UTI: Move constatns to a separate file

Change-Id: If3796b71d02bcf5a92612585dfa8867e5039f037
Signed-off-by: Tibor Frank <tifrank@cisco.com>

19 files changed, 493 insertions, 530 deletions

diff --git a/resources/tools/dash/app/pal/__init__.py b/resources/tools/dash/app/pal/__init__.py
index 9f80c5fcaa..0eb2a4e79e 100644
--- a/resources/tools/dash/app/pal/__init__.py
+++ b/resources/tools/dash/app/pal/__init__.py
@@ -19,21 +19,8 @@ import logging
 from flask import Flask
 from flask_assets import Environment
 
+from .utils.constants import Constants as C
 
-# Maximal value of TIME_PERIOD for Trending in days.
-# Do not change without a good reason.
-MAX_TIME_PERIOD = 180
-
-# It defines the time period for Trending in days from now back to the past from
-# which data is read to dataframes.
-# TIME_PERIOD = None means all data (max MAX_TIME_PERIOD days) is read.
-# TIME_PERIOD = MAX_TIME_PERIOD is the default value
-TIME_PERIOD = MAX_TIME_PERIOD  # [days]
-
-# List of releases used for iterative data processing.
-# The releases MUST be in the order from the current (newest) to the last
-# (oldest).
-RELEASES=["csit2206", "csit2202", ]
 
 def init_app():
     """Construct core Flask application with embedded Dash app.
@@ -58,10 +45,10 @@ def init_app():
         assets.init_app(app)
 
         # Set the time period for Trending
-        if TIME_PERIOD is None or TIME_PERIOD > MAX_TIME_PERIOD:
-            time_period = MAX_TIME_PERIOD
+        if C.TIME_PERIOD is None or C.TIME_PERIOD > C.MAX_TIME_PERIOD:
+            time_period = C.MAX_TIME_PERIOD
         else:
-            time_period = TIME_PERIOD
+            time_period = C.TIME_PERIOD
 
         # Import Dash applications.
         from .news.news import init_news
@@ -74,7 +61,7 @@ def init_app():
         app = init_trending(app, time_period=time_period)
 
         from .report.report import init_report
-        app = init_report(app, releases=RELEASES)
+        app = init_report(app, releases=C.RELEASES)
 
     return app
 
diff --git a/resources/tools/dash/app/pal/data/data.py b/resources/tools/dash/app/pal/data/data.py
index 296db024c0..0956333e34 100644
--- a/resources/tools/dash/app/pal/data/data.py
+++ b/resources/tools/dash/app/pal/data/data.py
@@ -15,15 +15,13 @@
 """
 
 import logging
+import awswrangler as wr
 
 from yaml import load, FullLoader, YAMLError
 from datetime import datetime, timedelta
 from time import time
 from pytz import UTC
 from pandas import DataFrame
-
-import awswrangler as wr
-
 from awswrangler.exceptions import EmptyDataFrame, NoFilesFound
 
 
diff --git a/resources/tools/dash/app/pal/news/layout.py b/resources/tools/dash/app/pal/news/layout.py
index 2f66ce5c81..c9f2808a14 100644
--- a/resources/tools/dash/app/pal/news/layout.py
+++ b/resources/tools/dash/app/pal/news/layout.py
@@ -27,7 +27,9 @@ from yaml import load, FullLoader, YAMLError
 from copy import deepcopy
 
 from ..data.data import Data
-from ..data.utils import classify_anomalies
+from ..utils.constants import Constants as C
+from ..utils.utils import classify_anomalies
+from ..data.data import Data
 from .tables import table_news
 
 
@@ -35,12 +37,6 @@ class Layout:
     """The layout of the dash app and the callbacks.
     """
 
-    # The default job displayed when the page is loaded first time.
-    DEFAULT_JOB = "csit-vpp-perf-mrr-daily-master-2n-icx"
-
-    # Time period for regressions and progressions.
-    TIME_PERIOD = 21  # [days]
-
     def __init__(self, app: Flask, html_layout_file: str, data_spec_file: str,
         tooltip_file: str) -> None:
         """Initialization:
@@ -73,7 +69,7 @@ class Layout:
         data_stats, data_mrr, data_ndrpdr = Data(
             data_spec_file=self._data_spec_file,
             debug=True
-        ).read_stats(days=self.TIME_PERIOD)
+        ).read_stats(days=C.NEWS_TIME_PERIOD)
 
         df_tst_info = pd.concat([data_mrr, data_ndrpdr], ignore_index=True)
 
@@ -95,7 +91,7 @@ class Layout:
             job_info["tbed"].append("-".join(lst_job[-2:]))
         self.df_job_info = pd.DataFrame.from_dict(job_info)
 
-        self._default = self._set_job_params(self.DEFAULT_JOB)
+        self._default = self._set_job_params(C.NEWS_DEFAULT_JOB)
 
         # Pre-process the data:
 
diff --git a/resources/tools/dash/app/pal/news/news.py b/resources/tools/dash/app/pal/news/news.py
index deb00c1810..5e65b62281 100644
--- a/resources/tools/dash/app/pal/news/news.py
+++ b/resources/tools/dash/app/pal/news/news.py
@@ -14,8 +14,8 @@
 """Instantiate the Statistics Dash applocation.
 """
 import dash
-import dash_bootstrap_components as dbc
 
+from ..utils.constants import Constants as C
 from .layout import Layout
 
 
@@ -30,15 +30,15 @@ def init_news(server):
 
     dash_app = dash.Dash(
         server=server,
-        routes_pathname_prefix=u"/news/",
-        external_stylesheets=[dbc.themes.LUX],
+        routes_pathname_prefix=C.NEWS_ROUTES_PATHNAME_PREFIX,
+        external_stylesheets=C.EXTERNAL_STYLESHEETS
     )
 
     layout = Layout(
         app=dash_app,
-        html_layout_file="pal/templates/news_layout.jinja2",
-        data_spec_file="pal/data/data.yaml",
-        tooltip_file="pal/data/tooltips.yaml",
+        html_layout_file=C.NEWS_HTML_LAYOUT_FILE,
+        data_spec_file=C.DATA_SPEC_FILE,
+        tooltip_file=C.TOOLTIP_FILE,
     )
     dash_app.index_string = layout.html_layout
     dash_app.layout = layout.add_content()
diff --git a/resources/tools/dash/app/pal/news/tables.py b/resources/tools/dash/app/pal/news/tables.py
index 53b24608d5..6272814165 100644
--- a/resources/tools/dash/app/pal/news/tables.py
+++ b/resources/tools/dash/app/pal/news/tables.py
@@ -17,9 +17,7 @@
 import pandas as pd
 import dash_bootstrap_components as dbc
 
-
-# Time period for regressions and progressions.
-TIME_PERIOD = 21  # [days]
+from ..utils.constants import Constants as C
 
 
 def table_news(data: pd.DataFrame, job: str) -> list:
@@ -57,7 +55,7 @@ def table_news(data: pd.DataFrame, job: str) -> list:
             class_name="p-0",
             size="lg",
             children=(
-                f"Regressions during the last {TIME_PERIOD} days "
+                f"Regressions during the last {C.NEWS_TIME_PERIOD} days "
                 f"({len(regressions['Test Name'])})"
             )
         ),
@@ -68,7 +66,7 @@ def table_news(data: pd.DataFrame, job: str) -> list:
             class_name="p-0",
             size="lg",
             children=(
-                f"Progressions during the last {TIME_PERIOD} days "
+                f"Progressions during the last {C.NEWS_TIME_PERIOD} days "
                 f"({len(progressions['Test Name'])})"
             )
         ),
diff --git a/resources/tools/dash/app/pal/report/graphs.py b/resources/tools/dash/app/pal/report/graphs.py
index 76aa8b7793..c5d8f8f2d7 100644
--- a/resources/tools/dash/app/pal/report/graphs.py
+++ b/resources/tools/dash/app/pal/report/graphs.py
@@ -20,75 +20,13 @@ import pandas as pd
 
 from copy import deepcopy
 
-import hdrh.histogram
-import hdrh.codec
-
-
-_NORM_FREQUENCY = 2.0  # [GHz]
-_FREQURENCY = {  # [GHz]
-    "2n-aws": 1.000,
-    "2n-dnv": 2.000,
-    "2n-clx": 2.300,
-    "2n-icx": 2.600,
-    "2n-skx": 2.500,
-    "2n-tx2": 2.500,
-    "2n-zn2": 2.900,
-    "3n-alt": 3.000,
-    "3n-aws": 1.000,
-    "3n-dnv": 2.000,
-    "3n-icx": 2.600,
-    "3n-skx": 2.500,
-    "3n-tsh": 2.200
-}
-
-_VALUE = {
-    "mrr": "result_receive_rate_rate_values",
-    "ndr": "result_ndr_lower_rate_value",
-    "pdr": "result_pdr_lower_rate_value",
-    "pdr-lat": "result_latency_forward_pdr_50_avg"
-}
-_UNIT = {
-    "mrr": "result_receive_rate_rate_unit",
-    "ndr": "result_ndr_lower_rate_unit",
-    "pdr": "result_pdr_lower_rate_unit",
-    "pdr-lat": "result_latency_forward_pdr_50_unit"
-}
-_LAT_HDRH = (  # Do not change the order
-    "result_latency_forward_pdr_0_hdrh",
-    "result_latency_reverse_pdr_0_hdrh",
-    "result_latency_forward_pdr_10_hdrh",
-    "result_latency_reverse_pdr_10_hdrh",
-    "result_latency_forward_pdr_50_hdrh",
-    "result_latency_reverse_pdr_50_hdrh",
-    "result_latency_forward_pdr_90_hdrh",
-    "result_latency_reverse_pdr_90_hdrh",
-)
-# This value depends on latency stream rate (9001 pps) and duration (5s).
-# Keep it slightly higher to ensure rounding errors to not remove tick mark.
-PERCENTILE_MAX = 99.999501
-
-_GRAPH_LAT_HDRH_DESC = {
-    "result_latency_forward_pdr_0_hdrh": "No-load.",
-    "result_latency_reverse_pdr_0_hdrh": "No-load.",
-    "result_latency_forward_pdr_10_hdrh": "Low-load, 10% PDR.",
-    "result_latency_reverse_pdr_10_hdrh": "Low-load, 10% PDR.",
-    "result_latency_forward_pdr_50_hdrh": "Mid-load, 50% PDR.",
-    "result_latency_reverse_pdr_50_hdrh": "Mid-load, 50% PDR.",
-    "result_latency_forward_pdr_90_hdrh": "High-load, 90% PDR.",
-    "result_latency_reverse_pdr_90_hdrh": "High-load, 90% PDR."
-}
+from ..utils.constants import Constants as C
 
 
 def _get_color(idx: int) -> str:
     """
     """
-    _COLORS = (
-        "#1A1110", "#DA2647", "#214FC6", "#01786F", "#BD8260", "#FFD12A",
-        "#A6E7FF", "#738276", "#C95A49", "#FC5A8D", "#CEC8EF", "#391285",
-        "#6F2DA8", "#FF878D", "#45A27D", "#FFD0B9", "#FD5240", "#DB91EF",
-        "#44D7A8", "#4F86F7", "#84DE02", "#FFCFF1", "#614051"
-    )
-    return _COLORS[idx % len(_COLORS)]
+    return C.PLOT_COLORS[idx % len(C.PLOT_COLORS)]
 
 
 def get_short_version(version: str, dut_type: str="vpp") -> str:
@@ -182,16 +120,16 @@ def graph_iterative(data: pd.DataFrame, sel:dict, layout: dict,
             continue
         phy = itm["phy"].split("-")
         topo_arch = f"{phy[0]}-{phy[1]}" if len(phy) == 4 else str()
-        norm_factor = (_NORM_FREQUENCY / _FREQURENCY[topo_arch]) \
+        norm_factor = (C.NORM_FREQUENCY / C.FREQUENCY[topo_arch]) \
             if normalize else 1.0
         if itm["testtype"] == "mrr":
-            y_data_raw = itm_data[_VALUE[itm["testtype"]]].to_list()[0]
+            y_data_raw = itm_data[C.VALUE_ITER[itm["testtype"]]].to_list()[0]
             y_data = [(y * norm_factor) for y in y_data_raw]
             if len(y_data) > 0:
                 y_tput_max = \
                     max(y_data) if max(y_data) > y_tput_max else y_tput_max
         else:
-            y_data_raw = itm_data[_VALUE[itm["testtype"]]].to_list()
+            y_data_raw = itm_data[C.VALUE_ITER[itm["testtype"]]].to_list()
             y_data = [(y * norm_factor) for y in y_data_raw]
             if y_data:
                 y_tput_max = \
@@ -214,7 +152,7 @@ def graph_iterative(data: pd.DataFrame, sel:dict, layout: dict,
         show_tput = True
 
         if itm["testtype"] == "pdr":
-            y_lat_row = itm_data[_VALUE["pdr-lat"]].to_list()
+            y_lat_row = itm_data[C.VALUE_ITER["pdr-lat"]].to_list()
             y_lat = [(y / norm_factor) for y in y_lat_row]
             if y_lat:
                 y_lat_max = max(y_lat) if max(y_lat) > y_lat_max else y_lat_max
@@ -302,73 +240,3 @@ def table_comparison(data: pd.DataFrame, sel:dict,
     )
 
     return pd.DataFrame()  #table
-
-
-def graph_hdrh_latency(data: dict, layout: dict) -> go.Figure:
-    """
-    """
-
-    fig = None
-
-    traces = list()
-    for idx, (lat_name, lat_hdrh) in enumerate(data.items()):
-        try:
-            decoded = hdrh.histogram.HdrHistogram.decode(lat_hdrh)
-        except (hdrh.codec.HdrLengthException, TypeError) as err:
-            continue
-        previous_x = 0.0
-        prev_perc = 0.0
-        xaxis = list()
-        yaxis = list()
-        hovertext = list()
-        for item in decoded.get_recorded_iterator():
-            # The real value is "percentile".
-            # For 100%, we cut that down to "x_perc" to avoid
-            # infinity.
-            percentile = item.percentile_level_iterated_to
-            x_perc = min(percentile, PERCENTILE_MAX)
-            xaxis.append(previous_x)
-            yaxis.append(item.value_iterated_to)
-            hovertext.append(
-                f"<b>{_GRAPH_LAT_HDRH_DESC[lat_name]}</b><br>"
-                f"Direction: {('W-E', 'E-W')[idx % 2]}<br>"
-                f"Percentile: {prev_perc:.5f}-{percentile:.5f}%<br>"
-                f"Latency: {item.value_iterated_to}uSec"
-            )
-            next_x = 100.0 / (100.0 - x_perc)
-            xaxis.append(next_x)
-            yaxis.append(item.value_iterated_to)
-            hovertext.append(
-                f"<b>{_GRAPH_LAT_HDRH_DESC[lat_name]}</b><br>"
-                f"Direction: {('W-E', 'E-W')[idx % 2]}<br>"
-                f"Percentile: {prev_perc:.5f}-{percentile:.5f}%<br>"
-                f"Latency: {item.value_iterated_to}uSec"
-            )
-            previous_x = next_x
-            prev_perc = percentile
-
-        traces.append(
-            go.Scatter(
-                x=xaxis,
-                y=yaxis,
-                name=_GRAPH_LAT_HDRH_DESC[lat_name],
-                mode="lines",
-                legendgroup=_GRAPH_LAT_HDRH_DESC[lat_name],
-                showlegend=bool(idx % 2),
-                line=dict(
-                    color=_get_color(int(idx/2)),
-                    dash="solid",
-                    width=1 if idx % 2 else 2
-                ),
-                hovertext=hovertext,
-                hoverinfo="text"
-            )
-        )
-    if traces:
-        fig = go.Figure()
-        fig.add_traces(traces)
-        layout_hdrh = layout.get("plot-hdrh-latency", None)
-        if lat_hdrh:
-            fig.update_layout(layout_hdrh)
-
-    return fig
diff --git a/resources/tools/dash/app/pal/report/layout.py b/resources/tools/dash/app/pal/report/layout.py
index e7c8db43ae..164f2d48d9 100644
--- a/resources/tools/dash/app/pal/report/layout.py
+++ b/resources/tools/dash/app/pal/report/layout.py
@@ -27,8 +27,9 @@ from yaml import load, FullLoader, YAMLError
 from copy import deepcopy
 from ast import literal_eval
 
+from ..utils.constants import Constants as C
+from ..utils.url_processing import url_decode, url_encode
 from ..data.data import Data
-from ..data.url_processing import url_decode, url_encode
 from .graphs import graph_iterative, table_comparison, get_short_version
 
 
@@ -36,51 +37,6 @@ class Layout:
     """
     """
 
-    # If True, clear all inputs in control panel when button "ADD SELECTED" is
-    # pressed.
-    CLEAR_ALL_INPUTS = False
-
-    STYLE_DISABLED = {"display": "none"}
-    STYLE_ENABLED = {"display": "inherit"}
-
-    CL_ALL_DISABLED = [{
-        "label": "All",
-        "value": "all",
-        "disabled": True
-    }]
-    CL_ALL_ENABLED = [{
-        "label": "All",
-        "value": "all",
-        "disabled": False
-    }]
-
-    PLACEHOLDER = html.Nobr("")
-
-    DRIVERS = ("avf", "af-xdp", "rdma", "dpdk")
-
-    LABELS = {
-        "dpdk": "DPDK",
-        "container_memif": "LXC/DRC Container Memif",
-        "crypto": "IPSec IPv4 Routing",
-        "ip4": "IPv4 Routing",
-        "ip6": "IPv6 Routing",
-        "ip4_tunnels": "IPv4 Tunnels",
-        "l2": "L2 Ethernet Switching",
-        "srv6": "SRv6 Routing",
-        "vm_vhost": "VMs vhost-user",
-        "nfv_density-dcr_memif-chain_ipsec": "CNF Service Chains Routing IPSec",
-        "nfv_density-vm_vhost-chain_dot1qip4vxlan":"VNF Service Chains Tunnels",
-        "nfv_density-vm_vhost-chain": "VNF Service Chains Routing",
-        "nfv_density-dcr_memif-pipeline": "CNF Service Pipelines Routing",
-        "nfv_density-dcr_memif-chain": "CNF Service Chains Routing",
-    }
-
-    URL_STYLE = {
-        "background-color": "#d2ebf5",
-        "border-color": "#bce1f1",
-        "color": "#135d7c"
-    }
-
     def __init__(self, app: Flask, releases: list, html_layout_file: str,
         graph_layout_file: str, data_spec_file: str, tooltip_file: str) -> None:
         """
@@ -125,7 +81,7 @@ class Layout:
                 replace("2n-", "")
             test = lst_test_id[-1]
             nic = suite.split("-")[0]
-            for drv in self.DRIVERS:
+            for drv in C.DRIVERS:
                 if drv in test:
                     driver = drv.replace("-", "_")
                     test = test.replace(f"{drv}-", "")
@@ -234,7 +190,7 @@ class Layout:
         return self._graph_layout
 
     def label(self, key: str) -> str:
-        return self.LABELS.get(key, key)
+        return C.LABELS.get(key, key)
 
     def _show_tooltip(self, id: str, title: str,
             clipboard_id: str=None) -> list:
@@ -359,9 +315,7 @@ class Layout:
                                     dbc.Row(  # Throughput
                                         id="row-graph-tput",
                                         class_name="g-0 p-2",
-                                        children=[
-                                            self.PLACEHOLDER
-                                        ]
+                                        children=[C.PLACEHOLDER, ]
                                     ),
                                     width=6
                                 ),
@@ -369,9 +323,7 @@ class Layout:
                                     dbc.Row(  # Latency
                                         id="row-graph-lat",
                                         class_name="g-0 p-2",
-                                        children=[
-                                            self.PLACEHOLDER
-                                        ]
+                                        children=[C.PLACEHOLDER, ]
                                     ),
                                     width=6
                                 )
@@ -380,16 +332,12 @@ class Layout:
                         dbc.Row(  # Tables
                             id="row-table",
                             class_name="g-0 p-2",
-                            children=[
-                                self.PLACEHOLDER
-                            ]
+                            children=[C.PLACEHOLDER, ]
                         ),
                         dbc.Row(  # Download
                             id="row-btn-download",
                             class_name="g-0 p-2",
-                            children=[
-                                self.PLACEHOLDER
-                            ]
+                            children=[C.PLACEHOLDER, ]
                         )
                     ]
                 )
@@ -548,7 +496,7 @@ class Layout:
                             children=[
                                 dbc.Checklist(
                                     id="cl-ctrl-framesize-all",
-                                    options=self.CL_ALL_DISABLED,
+                                    options=C.CL_ALL_DISABLED,
                                     inline=True,
                                     switch=False
                                 ),
@@ -579,7 +527,7 @@ class Layout:
                             children=[
                                 dbc.Checklist(
                                     id="cl-ctrl-core-all",
-                                    options=self.CL_ALL_DISABLED,
+                                    options=C.CL_ALL_DISABLED,
                                     inline=False,
                                     switch=False
                                 )
@@ -610,7 +558,7 @@ class Layout:
                             children=[
                                 dbc.Checklist(
                                     id="cl-ctrl-testtype-all",
-                                    options=self.CL_ALL_DISABLED,
+                                    options=C.CL_ALL_DISABLED,
                                     inline=True,
                                     switch=False
                                 ),
@@ -675,7 +623,7 @@ class Layout:
                 dbc.Row(
                     id="row-card-sel-tests",
                     class_name="gy-1",
-                    style=self.STYLE_DISABLED,
+                    style=C.STYLE_DISABLED,
                     children=[
                         dbc.Label(
                             "Selected tests",
@@ -692,7 +640,7 @@ class Layout:
                 ),
                 dbc.Row(
                     id="row-btns-sel-tests",
-                    style=self.STYLE_DISABLED,
+                    style=C.STYLE_DISABLED,
                     children=[
                         dbc.ButtonGroup(
                             class_name="gy-2",
@@ -722,12 +670,6 @@ class Layout:
     class ControlPanel:
         def __init__(self, panel: dict) -> None:
 
-            CL_ALL_DISABLED = [{
-                "label": "All",
-                "value": "all",
-                "disabled": True
-            }]
-
             # Defines also the order of keys
             self._defaults = {
                 "dd-rls-value": str(),
@@ -749,15 +691,15 @@ class Layout:
                 "cl-core-options": list(),
                 "cl-core-value": list(),
                 "cl-core-all-value": list(),
-                "cl-core-all-options": CL_ALL_DISABLED,
+                "cl-core-all-options": C.CL_ALL_DISABLED,
                 "cl-framesize-options": list(),
                 "cl-framesize-value": list(),
                 "cl-framesize-all-value": list(),
-                "cl-framesize-all-options": CL_ALL_DISABLED,
+                "cl-framesize-all-options": C.CL_ALL_DISABLED,
                 "cl-testtype-options": list(),
                 "cl-testtype-value": list(),
                 "cl-testtype-all-value": list(),
-                "cl-testtype-all-options": CL_ALL_DISABLED,
+                "cl-testtype-all-options": C.CL_ALL_DISABLED,
                 "btn-add-disabled": True,
                 "cl-normalize-value": list(),
                 "cl-selected-options": list()
@@ -818,10 +760,10 @@ class Layout:
 
             (fig_tput, fig_lat) = figs
 
-            row_fig_tput = self.PLACEHOLDER
-            row_fig_lat = self.PLACEHOLDER
-            row_table = self.PLACEHOLDER
-            row_btn_dwnld = self.PLACEHOLDER
+            row_fig_tput = C.PLACEHOLDER
+            row_fig_lat = C.PLACEHOLDER
+            row_table = C.PLACEHOLDER
+            row_btn_dwnld = C.PLACEHOLDER
 
             if fig_tput:
                 row_fig_tput = [
@@ -853,7 +795,7 @@ class Layout:
                                 class_name="me-1",
                                 children=[
                                     dbc.InputGroupText(
-                                        style=self.URL_STYLE,
+                                        style=C.URL_STYLE,
                                         children=self._show_tooltip(
                                             "help-url", "URL", "input-url")
                                     ),
@@ -861,7 +803,7 @@ class Layout:
                                         id="input-url",
                                         readonly=True,
                                         type="url",
-                                        style=self.URL_STYLE,
+                                        style=C.URL_STYLE,
                                         value=url
                                     )
                                 ]
@@ -1019,15 +961,15 @@ class Layout:
                     "cl-core-options": list(),
                     "cl-core-value": list(),
                     "cl-core-all-value": list(),
-                    "cl-core-all-options": self.CL_ALL_DISABLED,
+                    "cl-core-all-options": C.CL_ALL_DISABLED,
                     "cl-framesize-options": list(),
                     "cl-framesize-value": list(),
                     "cl-framesize-all-value": list(),
-                    "cl-framesize-all-options": self.CL_ALL_DISABLED,
+                    "cl-framesize-all-options": C.CL_ALL_DISABLED,
                     "cl-testtype-options": list(),
                     "cl-testtype-value": list(),
                     "cl-testtype-all-value": list(),
-                    "cl-testtype-all-options": self.CL_ALL_DISABLED
+                    "cl-testtype-all-options": C.CL_ALL_DISABLED
                 })
             elif trigger_id == "dd-ctrl-dut":
                 try:
@@ -1058,15 +1000,15 @@ class Layout:
                     "cl-core-options": list(),
                     "cl-core-value": list(),
                     "cl-core-all-value": list(),
-                    "cl-core-all-options": self.CL_ALL_DISABLED,
+                    "cl-core-all-options": C.CL_ALL_DISABLED,
                     "cl-framesize-options": list(),
                     "cl-framesize-value": list(),
                     "cl-framesize-all-value": list(),
-                    "cl-framesize-all-options": self.CL_ALL_DISABLED,
+                    "cl-framesize-all-options": C.CL_ALL_DISABLED,
                     "cl-testtype-options": list(),
                     "cl-testtype-value": list(),
                     "cl-testtype-all-value": list(),
-                    "cl-testtype-all-options": self.CL_ALL_DISABLED
+                    "cl-testtype-all-options": C.CL_ALL_DISABLED
                 })
             elif trigger_id == "dd-ctrl-dutver":
                 try:
@@ -1095,15 +1037,15 @@ class Layout:
                     "cl-core-options": list(),
                     "cl-core-value": list(),
                     "cl-core-all-value": list(),
-                    "cl-core-all-options": self.CL_ALL_DISABLED,
+                    "cl-core-all-options": C.CL_ALL_DISABLED,
                     "cl-framesize-options": list(),
                     "cl-framesize-value": list(),
                     "cl-framesize-all-value": list(),
-                    "cl-framesize-all-options": self.CL_ALL_DISABLED,
+                    "cl-framesize-all-options": C.CL_ALL_DISABLED,
                     "cl-testtype-options": list(),
                     "cl-testtype-value": list(),
                     "cl-testtype-all-value": list(),
-                    "cl-testtype-all-options": self.CL_ALL_DISABLED
+                    "cl-testtype-all-options": C.CL_ALL_DISABLED
                 })
             elif trigger_id == "dd-ctrl-phy":
                 try:
@@ -1131,15 +1073,15 @@ class Layout:
                     "cl-core-options": list(),
                     "cl-core-value": list(),
                     "cl-core-all-value": list(),
-                    "cl-core-all-options": self.CL_ALL_DISABLED,
+                    "cl-core-all-options": C.CL_ALL_DISABLED,
                     "cl-framesize-options": list(),
                     "cl-framesize-value": list(),
                     "cl-framesize-all-value": list(),
-                    "cl-framesize-all-options": self.CL_ALL_DISABLED,
+                    "cl-framesize-all-options": C.CL_ALL_DISABLED,
                     "cl-testtype-options": list(),
                     "cl-testtype-value": list(),
                     "cl-testtype-all-value": list(),
-                    "cl-testtype-all-options": self.CL_ALL_DISABLED
+                    "cl-testtype-all-options": C.CL_ALL_DISABLED
                 })
             elif trigger_id == "dd-ctrl-area":
                 try:
@@ -1164,15 +1106,15 @@ class Layout:
                     "cl-core-options": list(),
                     "cl-core-value": list(),
                     "cl-core-all-value": list(),
-                    "cl-core-all-options": self.CL_ALL_DISABLED,
+                    "cl-core-all-options": C.CL_ALL_DISABLED,
                     "cl-framesize-options": list(),
                     "cl-framesize-value": list(),
                     "cl-framesize-all-value": list(),
-                    "cl-framesize-all-options": self.CL_ALL_DISABLED,
+                    "cl-framesize-all-options": C.CL_ALL_DISABLED,
                     "cl-testtype-options": list(),
                     "cl-testtype-value": list(),
                     "cl-testtype-all-value": list(),
-                    "cl-testtype-all-options": self.CL_ALL_DISABLED
+                    "cl-testtype-all-options": C.CL_ALL_DISABLED
                 })
             elif trigger_id == "dd-ctrl-test":
                 rls = ctrl_panel.get("dd-rls-value")
@@ -1188,17 +1130,17 @@ class Layout:
                             for v in sorted(test["core"])],
                         "cl-core-value": list(),
                         "cl-core-all-value": list(),
-                        "cl-core-all-options": self.CL_ALL_ENABLED,
+                        "cl-core-all-options": C.CL_ALL_ENABLED,
                         "cl-framesize-options": [{"label": v, "value": v}
                             for v in sorted(test["frame-size"])],
                         "cl-framesize-value": list(),
                         "cl-framesize-all-value": list(),
-                        "cl-framesize-all-options": self.CL_ALL_ENABLED,
+                        "cl-framesize-all-options": C.CL_ALL_ENABLED,
                         "cl-testtype-options": [{"label": v, "value": v}
                             for v in sorted(test["test-type"])],
                         "cl-testtype-value": list(),
                         "cl-testtype-all-value": list(),
-                        "cl-testtype-all-options": self.CL_ALL_ENABLED,
+                        "cl-testtype-all-options": C.CL_ALL_ENABLED,
                     })
             elif trigger_id == "cl-ctrl-core":
                 val_sel, val_all = self._sync_checklists(
@@ -1305,21 +1247,21 @@ class Layout:
                                         "testtype": ttype.lower()
                                     })
                     store_sel = sorted(store_sel, key=lambda d: d["id"])
-                    row_card_sel_tests = self.STYLE_ENABLED
-                    row_btns_sel_tests = self.STYLE_ENABLED
-                    if self.CLEAR_ALL_INPUTS:
+                    row_card_sel_tests = C.STYLE_ENABLED
+                    row_btns_sel_tests = C.STYLE_ENABLED
+                    if C.CLEAR_ALL_INPUTS:
                         ctrl_panel.set(ctrl_panel.defaults)
                     ctrl_panel.set({
                         "cl-selected-options": self._list_tests(store_sel)
                     })
             elif trigger_id == "btn-sel-remove-all":
                 _ = btn_remove_all
-                row_fig_tput = self.PLACEHOLDER
-                row_fig_lat = self.PLACEHOLDER
-                row_table = self.PLACEHOLDER
-                row_btn_dwnld = self.PLACEHOLDER
-                row_card_sel_tests = self.STYLE_DISABLED
-                row_btns_sel_tests = self.STYLE_DISABLED
+                row_fig_tput = C.PLACEHOLDER
+                row_fig_lat = C.PLACEHOLDER
+                row_table = C.PLACEHOLDER
+                row_btn_dwnld = C.PLACEHOLDER
+                row_card_sel_tests = C.STYLE_DISABLED
+                row_btns_sel_tests = C.STYLE_DISABLED
                 store_sel = list()
                 ctrl_panel.set({"cl-selected-options": list()})
             elif trigger_id == "btn-sel-remove":
@@ -1337,8 +1279,8 @@ class Layout:
                     store_sel = literal_eval(
                         url_params.get("store_sel", list())[0])
                     if store_sel:
-                        row_card_sel_tests = self.STYLE_ENABLED
-                        row_btns_sel_tests = self.STYLE_ENABLED
+                        row_card_sel_tests = C.STYLE_ENABLED
+                        row_btns_sel_tests = C.STYLE_ENABLED
 
             if trigger_id in ("btn-ctrl-add", "url", "btn-sel-remove",
                     "cl-ctrl-normalize"):
@@ -1358,12 +1300,12 @@ class Layout:
                         "cl-selected-options": self._list_tests(store_sel)
                     })
                 else:
-                    row_fig_tput = self.PLACEHOLDER
-                    row_fig_lat = self.PLACEHOLDER
-                    row_table = self.PLACEHOLDER
-                    row_btn_dwnld = self.PLACEHOLDER
-                    row_card_sel_tests = self.STYLE_DISABLED
-                    row_btns_sel_tests = self.STYLE_DISABLED
+                    row_fig_tput = C.PLACEHOLDER
+                    row_fig_lat = C.PLACEHOLDER
+                    row_table = C.PLACEHOLDER
+                    row_btn_dwnld = C.PLACEHOLDER
+                    row_card_sel_tests = C.STYLE_DISABLED
+                    row_btns_sel_tests = C.STYLE_DISABLED
                     store_sel = list()
                     ctrl_panel.set({"cl-selected-options": list()})
 
diff --git a/resources/tools/dash/app/pal/report/report.py b/resources/tools/dash/app/pal/report/report.py
index c02b409973..c6008ca595 100644
--- a/resources/tools/dash/app/pal/report/report.py
+++ b/resources/tools/dash/app/pal/report/report.py
@@ -14,8 +14,8 @@
 """Instantiate the Report Dash applocation.
 """
 import dash
-import dash_bootstrap_components as dbc
 
+from ..utils.constants import Constants as C
 from .layout import Layout
 
 
@@ -30,17 +30,17 @@ def init_report(server, releases):
 
     dash_app = dash.Dash(
         server=server,
-        routes_pathname_prefix=u"/report/",
-        external_stylesheets=[dbc.themes.LUX],
+        routes_pathname_prefix=C.REPORT_ROUTES_PATHNAME_PREFIX,
+        external_stylesheets=C.EXTERNAL_STYLESHEETS
     )
 
     layout = Layout(
         app=dash_app,
         releases=releases,
-        html_layout_file="pal/templates/report_layout.jinja2",
-        graph_layout_file="pal/report/layout.yaml",
-        data_spec_file="pal/data/data.yaml",
-        tooltip_file="pal/data/tooltips.yaml"
+        html_layout_file=C.REPORT_HTML_LAYOUT_FILE,
+        graph_layout_file=C.REPORT_GRAPH_LAYOUT_FILE,
+        data_spec_file=C.DATA_SPEC_FILE,
+        tooltip_file=C.TOOLTIP_FILE,
     )
     dash_app.index_string = layout.html_layout
     dash_app.layout = layout.add_content()
diff --git a/resources/tools/dash/app/pal/routes.py b/resources/tools/dash/app/pal/routes.py
index d4cd88ffce..59af748168 100644
--- a/resources/tools/dash/app/pal/routes.py
+++ b/resources/tools/dash/app/pal/routes.py
@@ -17,14 +17,16 @@
 from flask import current_app as app
 from flask import render_template
 
+from .utils.constants import Constants as C
 
-@app.route("/")
+
+@app.route(C.APPLICATIN_ROOT)
 def home():
     """Landing page.
     """
     return render_template(
-        "index_layout.jinja2",
-        title="FD.io CSIT",
-        description="Performance Dashboard",
-        template="d-flex h-100 text-center text-white bg-dark"
+        C.MAIN_HTML_LAYOUT_FILE,
+        title=C.TITLE,
+        description=C.DESCRIPTION,
+        template=C.TEMPLATE
     )
diff --git a/resources/tools/dash/app/pal/stats/layout.py b/resources/tools/dash/app/pal/stats/layout.py
index 5c3758ba76..03707c0394 100644
--- a/resources/tools/dash/app/pal/stats/layout.py
+++ b/resources/tools/dash/app/pal/stats/layout.py
@@ -28,8 +28,9 @@ from yaml import load, FullLoader, YAMLError
 from datetime import datetime, timedelta
 from copy import deepcopy
 
+from ..utils.constants import Constants as C
+from ..utils.url_processing import url_decode, url_encode
 from ..data.data import Data
-from ..data.url_processing import url_decode, url_encode
 from .graphs import graph_statistics, select_data
 
 
@@ -37,14 +38,6 @@ class Layout:
     """
     """
 
-    DEFAULT_JOB = "csit-vpp-perf-mrr-daily-master-2n-icx"
-
-    URL_STYLE = {
-        "background-color": "#d2ebf5",
-        "border-color": "#bce1f1",
-        "color": "#135d7c"
-    }
-
     def __init__(self, app: Flask, html_layout_file: str,
         graph_layout_file: str, data_spec_file: str, tooltip_file: str,
         time_period: int=None) -> None:
@@ -95,7 +88,7 @@ class Layout:
             job_info["tbed"].append("-".join(lst_job[-2:]))
         self.df_job_info = pd.DataFrame.from_dict(job_info)
 
-        self._default = self._set_job_params(self.DEFAULT_JOB)
+        self._default = self._set_job_params(C.STATS_DEFAULT_JOB)
 
         tst_info = {
             "job": list(),
@@ -431,7 +424,7 @@ class Layout:
                                     class_name="me-1",
                                     children=[
                                         dbc.InputGroupText(
-                                            style=self.URL_STYLE,
+                                            style=C.URL_STYLE,
                                             children=self._show_tooltip(
                                                 "help-url", "URL", "input-url")
                                         ),
@@ -439,7 +432,7 @@ class Layout:
                                             id="input-url",
                                             readonly=True,
                                             type="url",
-                                            style=self.URL_STYLE,
+                                            style=C.URL_STYLE,
                                             value=""
                                         )
                                     ]
diff --git a/resources/tools/dash/app/pal/stats/stats.py b/resources/tools/dash/app/pal/stats/stats.py
index 3da742d61e..560ec53f14 100644
--- a/resources/tools/dash/app/pal/stats/stats.py
+++ b/resources/tools/dash/app/pal/stats/stats.py
@@ -14,8 +14,8 @@
 """Instantiate the Statistics Dash applocation.
 """
 import dash
-import dash_bootstrap_components as dbc
 
+from ..utils.constants import Constants as C
 from .layout import Layout
 
 
@@ -30,16 +30,16 @@ def init_stats(server, time_period=None):
 
     dash_app = dash.Dash(
         server=server,
-        routes_pathname_prefix=u"/stats/",
-        external_stylesheets=[dbc.themes.LUX],
+        routes_pathname_prefix=C.STATS_ROUTES_PATHNAME_PREFIX,
+        external_stylesheets=C.EXTERNAL_STYLESHEETS
     )
 
     layout = Layout(
         app=dash_app,
-        html_layout_file="pal/templates/stats_layout.jinja2",
-        graph_layout_file="pal/stats/layout.yaml",
-        data_spec_file="pal/data/data.yaml",
-        tooltip_file="pal/data/tooltips.yaml",
+        html_layout_file=C.STATS_HTML_LAYOUT_FILE,
+        graph_layout_file=C.STATS_GRAPH_LAYOUT_FILE,
+        data_spec_file=C.DATA_SPEC_FILE,
+        tooltip_file=C.TOOLTIP_FILE,
         time_period=time_period
     )
     dash_app.index_string = layout.html_layout
diff --git a/resources/tools/dash/app/pal/trending/graphs.py b/resources/tools/dash/app/pal/trending/graphs.py
index a63bebb818..0b4968082f 100644
--- a/resources/tools/dash/app/pal/trending/graphs.py
+++ b/resources/tools/dash/app/pal/trending/graphs.py
@@ -22,96 +22,14 @@ import hdrh.codec
 
 from datetime import datetime
 
-from ..data.utils import classify_anomalies
-
-_NORM_FREQUENCY = 2.0  # [GHz]
-_FREQURENCY = {  # [GHz]
-    "2n-aws": 1.000,
-    "2n-dnv": 2.000,
-    "2n-clx": 2.300,
-    "2n-icx": 2.600,
-    "2n-skx": 2.500,
-    "2n-tx2": 2.500,
-    "2n-zn2": 2.900,
-    "3n-alt": 3.000,
-    "3n-aws": 1.000,
-    "3n-dnv": 2.000,
-    "3n-icx": 2.600,
-    "3n-skx": 2.500,
-    "3n-tsh": 2.200
-}
-
-_ANOMALY_COLOR = {
-    "regression": 0.0,
-    "normal": 0.5,
-    "progression": 1.0
-}
-_COLORSCALE_TPUT = [
-    [0.00, "red"],
-    [0.33, "red"],
-    [0.33, "white"],
-    [0.66, "white"],
-    [0.66, "green"],
-    [1.00, "green"]
-]
-_TICK_TEXT_TPUT = ["Regression", "Normal", "Progression"]
-_COLORSCALE_LAT = [
-    [0.00, "green"],
-    [0.33, "green"],
-    [0.33, "white"],
-    [0.66, "white"],
-    [0.66, "red"],
-    [1.00, "red"]
-]
-_TICK_TEXT_LAT = ["Progression", "Normal", "Regression"]
-_VALUE = {
-    "mrr": "result_receive_rate_rate_avg",
-    "ndr": "result_ndr_lower_rate_value",
-    "pdr": "result_pdr_lower_rate_value",
-    "pdr-lat": "result_latency_forward_pdr_50_avg"
-}
-_UNIT = {
-    "mrr": "result_receive_rate_rate_unit",
-    "ndr": "result_ndr_lower_rate_unit",
-    "pdr": "result_pdr_lower_rate_unit",
-    "pdr-lat": "result_latency_forward_pdr_50_unit"
-}
-_LAT_HDRH = (  # Do not change the order
-    "result_latency_forward_pdr_0_hdrh",
-    "result_latency_reverse_pdr_0_hdrh",
-    "result_latency_forward_pdr_10_hdrh",
-    "result_latency_reverse_pdr_10_hdrh",
-    "result_latency_forward_pdr_50_hdrh",
-    "result_latency_reverse_pdr_50_hdrh",
-    "result_latency_forward_pdr_90_hdrh",
-    "result_latency_reverse_pdr_90_hdrh",
-)
-# This value depends on latency stream rate (9001 pps) and duration (5s).
-# Keep it slightly higher to ensure rounding errors to not remove tick mark.
-PERCENTILE_MAX = 99.999501
-
-_GRAPH_LAT_HDRH_DESC = {
-    "result_latency_forward_pdr_0_hdrh": "No-load.",
-    "result_latency_reverse_pdr_0_hdrh": "No-load.",
-    "result_latency_forward_pdr_10_hdrh": "Low-load, 10% PDR.",
-    "result_latency_reverse_pdr_10_hdrh": "Low-load, 10% PDR.",
-    "result_latency_forward_pdr_50_hdrh": "Mid-load, 50% PDR.",
-    "result_latency_reverse_pdr_50_hdrh": "Mid-load, 50% PDR.",
-    "result_latency_forward_pdr_90_hdrh": "High-load, 90% PDR.",
-    "result_latency_reverse_pdr_90_hdrh": "High-load, 90% PDR."
-}
+from ..utils.constants import Constants as C
+from ..utils.utils import classify_anomalies
 
 
 def _get_color(idx: int) -> str:
     """
     """
-    _COLORS = (
-        "#1A1110", "#DA2647", "#214FC6", "#01786F", "#BD8260", "#FFD12A",
-        "#A6E7FF", "#738276", "#C95A49", "#FC5A8D", "#CEC8EF", "#391285",
-        "#6F2DA8", "#FF878D", "#45A27D", "#FFD0B9", "#FD5240", "#DB91EF",
-        "#44D7A8", "#4F86F7", "#84DE02", "#FFCFF1", "#614051"
-    )
-    return _COLORS[idx % len(_COLORS)]
+    return C.PLOT_COLORS[idx % len(C.PLOT_COLORS)]
 
 
 def _get_hdrh_latencies(row: pd.Series, name: str) -> dict:
@@ -119,7 +37,7 @@ def _get_hdrh_latencies(row: pd.Series, name: str) -> dict:
     """
 
     latencies = {"name": name}
-    for key in _LAT_HDRH:
+    for key in C.LAT_HDRH:
         try:
             latencies[key] = row[key]
         except KeyError:
@@ -176,7 +94,7 @@ def _generate_trending_traces(ttype: str, name: str, df: pd.DataFrame,
     """
     """
 
-    df = df.dropna(subset=[_VALUE[ttype], ])
+    df = df.dropna(subset=[C.VALUE[ttype], ])
     if df.empty:
         return list()
     df = df.loc[((df["start_time"] >= start) & (df["start_time"] <= end))]
@@ -185,9 +103,9 @@ def _generate_trending_traces(ttype: str, name: str, df: pd.DataFrame,
 
     x_axis = df["start_time"].tolist()
     if ttype == "pdr-lat":
-        y_data = [(itm / norm_factor) for itm in df[_VALUE[ttype]].tolist()]
+        y_data = [(itm / norm_factor) for itm in df[C.VALUE[ttype]].tolist()]
     else:
-        y_data = [(itm * norm_factor) for itm in df[_VALUE[ttype]].tolist()]
+        y_data = [(itm * norm_factor) for itm in df[C.VALUE[ttype]].tolist()]
 
     anomalies, trend_avg, trend_stdev = classify_anomalies(
         {k: v for k, v in zip(x_axis, y_data)}
@@ -199,7 +117,7 @@ def _generate_trending_traces(ttype: str, name: str, df: pd.DataFrame,
         d_type = "trex" if row["dut_type"] == "none" else row["dut_type"]
         hover_itm = (
             f"date: {row['start_time'].strftime('%Y-%m-%d %H:%M:%S')}<br>"
-            f"<prop> [{row[_UNIT[ttype]]}]: {y_data[idx]:,.0f}<br>"
+            f"<prop> [{row[C.UNIT[ttype]]}]: {y_data[idx]:,.0f}<br>"
             f"<stdev>"
             f"{d_type}-ref: {row['dut_version']}<br>"
             f"csit-ref: {row['job']}/{row['build']}<br>"
@@ -277,7 +195,7 @@ def _generate_trending_traces(ttype: str, name: str, df: pd.DataFrame,
             if anomaly in ("regression", "progression"):
                 anomaly_x.append(x_axis[idx])
                 anomaly_y.append(trend_avg[idx])
-                anomaly_color.append(_ANOMALY_COLOR[anomaly])
+                anomaly_color.append(C.ANOMALY_COLOR[anomaly])
                 hover_itm = (
                     f"date: {x_axis[idx].strftime('%Y-%m-%d %H:%M:%S')}<br>"
                     f"trend [pps]: {trend_avg[idx]:,.0f}<br>"
@@ -301,8 +219,8 @@ def _generate_trending_traces(ttype: str, name: str, df: pd.DataFrame,
                     "size": 15,
                     "symbol": "circle-open",
                     "color": anomaly_color,
-                    "colorscale": _COLORSCALE_LAT \
-                        if ttype == "pdr-lat" else _COLORSCALE_TPUT,
+                    "colorscale": C.COLORSCALE_LAT \
+                        if ttype == "pdr-lat" else C.COLORSCALE_TPUT,
                     "showscale": True,
                     "line": {
                         "width": 2
@@ -314,8 +232,8 @@ def _generate_trending_traces(ttype: str, name: str, df: pd.DataFrame,
                         "titleside": "right",
                         "tickmode": "array",
                         "tickvals": [0.167, 0.500, 0.833],
-                        "ticktext": _TICK_TEXT_LAT \
-                            if ttype == "pdr-lat" else _TICK_TEXT_TPUT,
+                        "ticktext": C.TICK_TEXT_LAT \
+                            if ttype == "pdr-lat" else C.TICK_TEXT_TPUT,
                         "ticks": "",
                         "ticklen": 0,
                         "tickangle": -90,
@@ -349,7 +267,7 @@ def graph_trending(data: pd.DataFrame, sel:dict, layout: dict,
         if normalize:
             phy = itm["phy"].split("-")
             topo_arch = f"{phy[0]}-{phy[1]}" if len(phy) == 4 else str()
-            norm_factor = (_NORM_FREQUENCY / _FREQURENCY[topo_arch]) \
+            norm_factor = (C.NORM_FREQUENCY / C.FREQUENCY[topo_arch]) \
                 if topo_arch else 1.0
         else:
             norm_factor = 1.0
@@ -400,11 +318,11 @@ def graph_hdrh_latency(data: dict, layout: dict) -> go.Figure:
             # For 100%, we cut that down to "x_perc" to avoid
             # infinity.
             percentile = item.percentile_level_iterated_to
-            x_perc = min(percentile, PERCENTILE_MAX)
+            x_perc = min(percentile, C.PERCENTILE_MAX)
             xaxis.append(previous_x)
             yaxis.append(item.value_iterated_to)
             hovertext.append(
-                f"<b>{_GRAPH_LAT_HDRH_DESC[lat_name]}</b><br>"
+                f"<b>{C.GRAPH_LAT_HDRH_DESC[lat_name]}</b><br>"
                 f"Direction: {('W-E', 'E-W')[idx % 2]}<br>"
                 f"Percentile: {prev_perc:.5f}-{percentile:.5f}%<br>"
                 f"Latency: {item.value_iterated_to}uSec"
@@ -413,7 +331,7 @@ def graph_hdrh_latency(data: dict, layout: dict) -> go.Figure:
             xaxis.append(next_x)
             yaxis.append(item.value_iterated_to)
             hovertext.append(
-                f"<b>{_GRAPH_LAT_HDRH_DESC[lat_name]}</b><br>"
+                f"<b>{C.GRAPH_LAT_HDRH_DESC[lat_name]}</b><br>"
                 f"Direction: {('W-E', 'E-W')[idx % 2]}<br>"
                 f"Percentile: {prev_perc:.5f}-{percentile:.5f}%<br>"
                 f"Latency: {item.value_iterated_to}uSec"
@@ -425,9 +343,9 @@ def graph_hdrh_latency(data: dict, layout: dict) -> go.Figure:
             go.Scatter(
                 x=xaxis,
                 y=yaxis,
-                name=_GRAPH_LAT_HDRH_DESC[lat_name],
+                name=C.GRAPH_LAT_HDRH_DESC[lat_name],
                 mode="lines",
-                legendgroup=_GRAPH_LAT_HDRH_DESC[lat_name],
+                legendgroup=C.GRAPH_LAT_HDRH_DESC[lat_name],
                 showlegend=bool(idx % 2),
                 line=dict(
                     color=_get_color(int(idx/2)),
diff --git a/resources/tools/dash/app/pal/trending/layout.py b/resources/tools/dash/app/pal/trending/layout.py
index d632820b99..48a8e5481e 100644
--- a/resources/tools/dash/app/pal/trending/layout.py
+++ b/resources/tools/dash/app/pal/trending/layout.py
@@ -30,8 +30,9 @@ from copy import deepcopy
 from json import loads, JSONDecodeError
 from ast import literal_eval
 
+from ..utils.constants import Constants as C
+from ..utils.url_processing import url_decode, url_encode
 from ..data.data import Data
-from ..data.url_processing import url_decode, url_encode
 from .graphs import graph_trending, graph_hdrh_latency, \
     select_trending_data
 
@@ -40,51 +41,6 @@ class Layout:
     """
     """
 
-    # If True, clear all inputs in control panel when button "ADD SELECTED" is
-    # pressed.
-    CLEAR_ALL_INPUTS = False
-
-    STYLE_DISABLED = {"display": "none"}
-    STYLE_ENABLED = {"display": "inherit"}
-
-    CL_ALL_DISABLED = [{
-        "label": "All",
-        "value": "all",
-        "disabled": True
-    }]
-    CL_ALL_ENABLED = [{
-        "label": "All",
-        "value": "all",
-        "disabled": False
-    }]
-
-    PLACEHOLDER = html.Nobr("")
-
-    DRIVERS = ("avf", "af-xdp", "rdma", "dpdk")
-
-    LABELS = {
-        "dpdk": "DPDK",
-        "container_memif": "LXC/DRC Container Memif",
-        "crypto": "IPSec IPv4 Routing",
-        "ip4": "IPv4 Routing",
-        "ip6": "IPv6 Routing",
-        "ip4_tunnels": "IPv4 Tunnels",
-        "l2": "L2 Ethernet Switching",
-        "srv6": "SRv6 Routing",
-        "vm_vhost": "VMs vhost-user",
-        "nfv_density-dcr_memif-chain_ipsec": "CNF Service Chains Routing IPSec",
-        "nfv_density-vm_vhost-chain_dot1qip4vxlan":"VNF Service Chains Tunnels",
-        "nfv_density-vm_vhost-chain": "VNF Service Chains Routing",
-        "nfv_density-dcr_memif-pipeline": "CNF Service Pipelines Routing",
-        "nfv_density-dcr_memif-chain": "CNF Service Chains Routing",
-    }
-
-    URL_STYLE = {
-        "background-color": "#d2ebf5",
-        "border-color": "#bce1f1",
-        "color": "#135d7c"
-    }
-
     def __init__(self, app: Flask, html_layout_file: str,
         graph_layout_file: str, data_spec_file: str, tooltip_file: str,
         time_period: str=None) -> None:
@@ -135,7 +91,7 @@ class Layout:
                 replace("2n-", "")
             test = lst_test[-1]
             nic = suite.split("-")[0]
-            for drv in self.DRIVERS:
+            for drv in C.DRIVERS:
                 if drv in test:
                     if drv == "af-xdp":
                         driver = "af_xdp"
@@ -242,7 +198,7 @@ class Layout:
         return self._time_period
 
     def label(self, key: str) -> str:
-        return self.LABELS.get(key, key)
+        return C.LABELS.get(key, key)
 
     def _show_tooltip(self, id: str, title: str,
             clipboard_id: str=None) -> list:
@@ -364,21 +320,21 @@ class Layout:
                             id="row-graph-tput",
                             class_name="g-0 p-2",
                             children=[
-                                self.PLACEHOLDER
+                                C.PLACEHOLDER
                             ]
                         ),
                         dbc.Row(  # Latency
                             id="row-graph-lat",
                             class_name="g-0 p-2",
                             children=[
-                                self.PLACEHOLDER
+                                C.PLACEHOLDER
                             ]
                         ),
                         dbc.Row(  # Download
                             id="row-btn-download",
                             class_name="g-0 p-2",
                             children=[
-                                self.PLACEHOLDER
+                                C.PLACEHOLDER
                             ]
                         )
                     ]
@@ -497,7 +453,7 @@ class Layout:
                             children=[
                                 dbc.Checklist(
                                     id="cl-ctrl-framesize-all",
-                                    options=self.CL_ALL_DISABLED,
+                                    options=C.CL_ALL_DISABLED,
                                     inline=True,
                                     switch=False
                                 ),
@@ -528,7 +484,7 @@ class Layout:
                             children=[
                                 dbc.Checklist(
                                     id="cl-ctrl-core-all",
-                                    options=self.CL_ALL_DISABLED,
+                                    options=C.CL_ALL_DISABLED,
                                     inline=False,
                                     switch=False
                                 )
@@ -559,7 +515,7 @@ class Layout:
                             children=[
                                 dbc.Checklist(
                                     id="cl-ctrl-testtype-all",
-                                    options=self.CL_ALL_DISABLED,
+                                    options=C.CL_ALL_DISABLED,
                                     inline=True,
                                     switch=False
                                 ),
@@ -648,7 +604,7 @@ class Layout:
                 dbc.Row(
                     id="row-card-sel-tests",
                     class_name="gy-1",
-                    style=self.STYLE_DISABLED,
+                    style=C.STYLE_DISABLED,
                     children=[
                         dbc.Label(
                             "Selected tests",
@@ -665,7 +621,7 @@ class Layout:
                 ),
                 dbc.Row(
                     id="row-btns-sel-tests",
-                    style=self.STYLE_DISABLED,
+                    style=C.STYLE_DISABLED,
                     children=[
                         dbc.ButtonGroup(
                             class_name="gy-2",
@@ -695,12 +651,6 @@ class Layout:
     class ControlPanel:
         def __init__(self, panel: dict) -> None:
 
-            CL_ALL_DISABLED = [{
-                "label": "All",
-                "value": "all",
-                "disabled": True
-            }]
-
             # Defines also the order of keys
             self._defaults = {
                 "dd-ctrl-dut-value": str(),
@@ -716,15 +666,15 @@ class Layout:
                 "cl-ctrl-core-options": list(),
                 "cl-ctrl-core-value": list(),
                 "cl-ctrl-core-all-value": list(),
-                "cl-ctrl-core-all-options": CL_ALL_DISABLED,
+                "cl-ctrl-core-all-options": C.CL_ALL_DISABLED,
                 "cl-ctrl-framesize-options": list(),
                 "cl-ctrl-framesize-value": list(),
                 "cl-ctrl-framesize-all-value": list(),
-                "cl-ctrl-framesize-all-options": CL_ALL_DISABLED,
+                "cl-ctrl-framesize-all-options": C.CL_ALL_DISABLED,
                 "cl-ctrl-testtype-options": list(),
                 "cl-ctrl-testtype-value": list(),
                 "cl-ctrl-testtype-all-value": list(),
-                "cl-ctrl-testtype-all-options": CL_ALL_DISABLED,
+                "cl-ctrl-testtype-all-options": C.CL_ALL_DISABLED,
                 "btn-ctrl-add-disabled": True,
                 "cl-normalize-value": list(),
                 "cl-selected-options": list(),
@@ -788,9 +738,9 @@ class Layout:
 
             (fig_tput, fig_lat) = figs
 
-            row_fig_tput = self.PLACEHOLDER
-            row_fig_lat = self.PLACEHOLDER
-            row_btn_dwnld = self.PLACEHOLDER
+            row_fig_tput = C.PLACEHOLDER
+            row_fig_lat = C.PLACEHOLDER
+            row_btn_dwnld = C.PLACEHOLDER
 
             if fig_tput:
                 row_fig_tput = [
@@ -822,7 +772,7 @@ class Layout:
                                 class_name="me-1",
                                 children=[
                                     dbc.InputGroupText(
-                                        style=self.URL_STYLE,
+                                        style=C.URL_STYLE,
                                         children=self._show_tooltip(
                                             "help-url", "URL", "input-url")
                                     ),
@@ -830,7 +780,7 @@ class Layout:
                                         id="input-url",
                                         readonly=True,
                                         type="url",
-                                        style=self.URL_STYLE,
+                                        style=C.URL_STYLE,
                                         value=url
                                     )
                                 ]
@@ -971,15 +921,15 @@ class Layout:
                     "cl-ctrl-core-options": list(),
                     "cl-ctrl-core-value": list(),
                     "cl-ctrl-core-all-value": list(),
-                    "cl-ctrl-core-all-options": self.CL_ALL_DISABLED,
+                    "cl-ctrl-core-all-options": C.CL_ALL_DISABLED,
                     "cl-ctrl-framesize-options": list(),
                     "cl-ctrl-framesize-value": list(),
                     "cl-ctrl-framesize-all-value": list(),
-                    "cl-ctrl-framesize-all-options": self.CL_ALL_DISABLED,
+                    "cl-ctrl-framesize-all-options": C.CL_ALL_DISABLED,
                     "cl-ctrl-testtype-options": list(),
                     "cl-ctrl-testtype-value": list(),
                     "cl-ctrl-testtype-all-value": list(),
-                    "cl-ctrl-testtype-all-options": self.CL_ALL_DISABLED,
+                    "cl-ctrl-testtype-all-options": C.CL_ALL_DISABLED,
                 })
             elif trigger_id == "dd-ctrl-phy":
                 try:
@@ -1005,15 +955,15 @@ class Layout:
                     "cl-ctrl-core-options": list(),
                     "cl-ctrl-core-value": list(),
                     "cl-ctrl-core-all-value": list(),
-                    "cl-ctrl-core-all-options": self.CL_ALL_DISABLED,
+                    "cl-ctrl-core-all-options": C.CL_ALL_DISABLED,
                     "cl-ctrl-framesize-options": list(),
                     "cl-ctrl-framesize-value": list(),
                     "cl-ctrl-framesize-all-value": list(),
-                    "cl-ctrl-framesize-all-options": self.CL_ALL_DISABLED,
+                    "cl-ctrl-framesize-all-options": C.CL_ALL_DISABLED,
                     "cl-ctrl-testtype-options": list(),
                     "cl-ctrl-testtype-value": list(),
                     "cl-ctrl-testtype-all-value": list(),
-                    "cl-ctrl-testtype-all-options": self.CL_ALL_DISABLED,
+                    "cl-ctrl-testtype-all-options": C.CL_ALL_DISABLED,
                 })
             elif trigger_id == "dd-ctrl-area":
                 try:
@@ -1036,15 +986,15 @@ class Layout:
                     "cl-ctrl-core-options": list(),
                     "cl-ctrl-core-value": list(),
                     "cl-ctrl-core-all-value": list(),
-                    "cl-ctrl-core-all-options": self.CL_ALL_DISABLED,
+                    "cl-ctrl-core-all-options": C.CL_ALL_DISABLED,
                     "cl-ctrl-framesize-options": list(),
                     "cl-ctrl-framesize-value": list(),
                     "cl-ctrl-framesize-all-value": list(),
-                    "cl-ctrl-framesize-all-options": self.CL_ALL_DISABLED,
+                    "cl-ctrl-framesize-all-options": C.CL_ALL_DISABLED,
                     "cl-ctrl-testtype-options": list(),
                     "cl-ctrl-testtype-value": list(),
                     "cl-ctrl-testtype-all-value": list(),
-                    "cl-ctrl-testtype-all-options": self.CL_ALL_DISABLED,
+                    "cl-ctrl-testtype-all-options": C.CL_ALL_DISABLED,
                 })
             elif trigger_id == "dd-ctrl-test":
                 core_opts = list()
@@ -1069,15 +1019,15 @@ class Layout:
                         "cl-ctrl-core-options": core_opts,
                         "cl-ctrl-core-value": list(),
                         "cl-ctrl-core-all-value": list(),
-                        "cl-ctrl-core-all-options": self.CL_ALL_ENABLED,
+                        "cl-ctrl-core-all-options": C.CL_ALL_ENABLED,
                         "cl-ctrl-framesize-options": framesize_opts,
                         "cl-ctrl-framesize-value": list(),
                         "cl-ctrl-framesize-all-value": list(),
-                        "cl-ctrl-framesize-all-options": self.CL_ALL_ENABLED,
+                        "cl-ctrl-framesize-all-options": C.CL_ALL_ENABLED,
                         "cl-ctrl-testtype-options": testtype_opts,
                         "cl-ctrl-testtype-value": list(),
                         "cl-ctrl-testtype-all-value": list(),
-                        "cl-ctrl-testtype-all-options": self.CL_ALL_ENABLED,
+                        "cl-ctrl-testtype-all-options": C.CL_ALL_ENABLED,
                     })
             elif trigger_id == "cl-ctrl-core":
                 val_sel, val_all = self._sync_checklists(
@@ -1180,17 +1130,17 @@ class Layout:
                                         "testtype": ttype.lower()
                                     })
                     store_sel = sorted(store_sel, key=lambda d: d["id"])
-                    row_card_sel_tests = self.STYLE_ENABLED
-                    row_btns_sel_tests = self.STYLE_ENABLED
-                    if self.CLEAR_ALL_INPUTS:
+                    row_card_sel_tests = C.STYLE_ENABLED
+                    row_btns_sel_tests = C.STYLE_ENABLED
+                    if C.CLEAR_ALL_INPUTS:
                         ctrl_panel.set(ctrl_panel.defaults)
             elif trigger_id == "btn-sel-remove-all":
                 _ = btn_remove_all
-                row_fig_tput = self.PLACEHOLDER
-                row_fig_lat = self.PLACEHOLDER
-                row_btn_dwnld = self.PLACEHOLDER
-                row_card_sel_tests = self.STYLE_DISABLED
-                row_btns_sel_tests = self.STYLE_DISABLED
+                row_fig_tput = C.PLACEHOLDER
+                row_fig_lat = C.PLACEHOLDER
+                row_btn_dwnld = C.PLACEHOLDER
+                row_card_sel_tests = C.STYLE_DISABLED
+                row_btns_sel_tests = C.STYLE_DISABLED
                 store_sel = list()
                 ctrl_panel.set({"cl-selected-options": list()})
             elif trigger_id == "btn-sel-remove":
@@ -1210,8 +1160,8 @@ class Layout:
                     d_start = self._get_date(url_params.get("start", list())[0])
                     d_end = self._get_date(url_params.get("end", list())[0])
                     if store_sel:
-                        row_card_sel_tests = self.STYLE_ENABLED
-                        row_btns_sel_tests = self.STYLE_ENABLED
+                        row_card_sel_tests = C.STYLE_ENABLED
+                        row_btns_sel_tests = C.STYLE_ENABLED
 
             if trigger_id in ("btn-ctrl-add", "url", "dpr-period",
                     "btn-sel-remove", "cl-ctrl-normalize"):
@@ -1226,11 +1176,11 @@ class Layout:
                         "cl-selected-options": self._list_tests(store_sel)
                     })
                 else:
-                    row_fig_tput = self.PLACEHOLDER
-                    row_fig_lat = self.PLACEHOLDER
-                    row_btn_dwnld = self.PLACEHOLDER
-                    row_card_sel_tests = self.STYLE_DISABLED
-                    row_btns_sel_tests = self.STYLE_DISABLED
+                    row_fig_tput = C.PLACEHOLDER
+                    row_fig_lat = C.PLACEHOLDER
+                    row_btn_dwnld = C.PLACEHOLDER
+                    row_card_sel_tests = C.STYLE_DISABLED
+                    row_btns_sel_tests = C.STYLE_DISABLED
                     store_sel = list()
                     ctrl_panel.set({"cl-selected-options": list()})
 
diff --git a/resources/tools/dash/app/pal/trending/trending.py b/resources/tools/dash/app/pal/trending/trending.py
index 1c64677eea..3697f7150f 100644
--- a/resources/tools/dash/app/pal/trending/trending.py
+++ b/resources/tools/dash/app/pal/trending/trending.py
@@ -14,8 +14,8 @@
 """Instantiate the Trending Dash applocation.
 """
 import dash
-import dash_bootstrap_components as dbc
 
+from ..utils.constants import Constants as C
 from .layout import Layout
 
 
@@ -30,16 +30,16 @@ def init_trending(server, time_period=None):
 
     dash_app = dash.Dash(
         server=server,
-        routes_pathname_prefix=u"/trending/",
-        external_stylesheets=[dbc.themes.LUX],
+        routes_pathname_prefix=C.TREND_ROUTES_PATHNAME_PREFIX,
+        external_stylesheets=C.EXTERNAL_STYLESHEETS
     )
 
     layout = Layout(
         app=dash_app,
-        html_layout_file="pal/templates/trending_layout.jinja2",
-        graph_layout_file="pal/trending/layout.yaml",
-        data_spec_file="pal/data/data.yaml",
-        tooltip_file="pal/data/tooltips.yaml",
+        html_layout_file=C.TREND_HTML_LAYOUT_FILE,
+        graph_layout_file=C.TREND_GRAPH_LAYOUT_FILE,
+        data_spec_file=C.DATA_SPEC_FILE,
+        tooltip_file=C.TOOLTIP_FILE,
         time_period=time_period
     )
     dash_app.index_string = layout.html_layout
diff --git a/resources/tools/dash/app/pal/utils/__init__.py b/resources/tools/dash/app/pal/utils/__init__.py
new file mode 100644
index 0000000000..5692432123
--- /dev/null
+++ b/resources/tools/dash/app/pal/utils/__init__.py
@@ -0,0 +1,12 @@
+# Copyright (c) 2022 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/resources/tools/dash/app/pal/utils/constants.py b/resources/tools/dash/app/pal/utils/constants.py
new file mode 100644
index 0000000000..1c84ba14a6
--- /dev/null
+++ b/resources/tools/dash/app/pal/utils/constants.py
@@ -0,0 +1,299 @@
+# Copyright (c) 2022 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Constants used in Dash PAL.
+
+"Constant" means a value that keeps its value since initialization. The value
+does not need to be hard coded here, but can be read from environment variables.
+"""
+
+
+import dash_bootstrap_components as dbc
+
+from dash import html
+
+
+class Constants:
+    """Constants used in Dash PAL.
+    """
+
+    ############################################################################
+    # General, application wide constants.
+
+    # The application title.
+    TITLE = "FD.io CSIT"
+
+    # The application description.
+    DESCRIPTION = "Performance Dashboard"
+
+    # External stylesheets.
+    EXTERNAL_STYLESHEETS = [dbc.themes.LUX, ]
+
+    # Top level template for all pages.
+    TEMPLATE = "d-flex h-100 text-center text-white bg-dark"
+
+    # Path and name of the file specifying the HTML layout of the dash
+    # application.
+    MAIN_HTML_LAYOUT_FILE = "index_layout.jinja2"
+
+    # Application root.
+    APPLICATIN_ROOT = "/"
+
+    # Data to be downloaded from the parquets specification file.
+    DATA_SPEC_FILE = "pal/data/data.yaml"
+
+    # The file with tooltips.
+    TOOLTIP_FILE = "pal/utils/tooltips.yaml"
+
+    # Maximal value of TIME_PERIOD for data read from the parquets in days.
+    # Do not change without a good reason.
+    MAX_TIME_PERIOD = 180
+
+    # It defines the time period for data read from the parquets in days from
+    # now back to the past.
+    # TIME_PERIOD = None - means all data (max MAX_TIME_PERIOD days) is read.
+    # TIME_PERIOD = MAX_TIME_PERIOD - is the default value
+    TIME_PERIOD = MAX_TIME_PERIOD  # [days]
+
+    # List of releases used for iterative data processing.
+    # The releases MUST be in the order from the current (newest) to the last
+    # (oldest).
+    RELEASES = ["csit2206", "csit2202", ]
+
+    ############################################################################
+    # General, application wide, layout affecting constants.
+
+    # If True, clear all inputs in control panel when button "ADD SELECTED" is
+    # pressed.
+    CLEAR_ALL_INPUTS = False
+
+    # The element is disabled.
+    STYLE_DISABLED = {"display": "none"}
+
+    # The element is enabled and visible.
+    STYLE_ENABLED = {"display": "inherit"}
+
+    # Checklist "All" is disabled.
+    CL_ALL_DISABLED = [
+        {
+            "label": "All",
+            "value": "all",
+            "disabled": True
+        }
+    ]
+
+    # Checklist "All" is enable, visible and unchecked.
+    CL_ALL_ENABLED = [
+        {
+            "label": "All",
+            "value": "all",
+            "disabled": False
+        }
+    ]
+
+    # Placeholder for any element in the layout.
+    PLACEHOLDER = html.Nobr("")
+
+    # List of drivers used in CSIT.
+    DRIVERS = ("avf", "af-xdp", "rdma", "dpdk")
+
+    # Labels for input elements (dropdowns, ...).
+    LABELS = {
+        "dpdk": "DPDK",
+        "container_memif": "LXC/DRC Container Memif",
+        "crypto": "IPSec IPv4 Routing",
+        "ip4": "IPv4 Routing",
+        "ip6": "IPv6 Routing",
+        "ip4_tunnels": "IPv4 Tunnels",
+        "l2": "L2 Ethernet Switching",
+        "srv6": "SRv6 Routing",
+        "vm_vhost": "VMs vhost-user",
+        "nfv_density-dcr_memif-chain_ipsec": "CNF Service Chains Routing IPSec",
+        "nfv_density-vm_vhost-chain_dot1qip4vxlan":"VNF Service Chains Tunnels",
+        "nfv_density-vm_vhost-chain": "VNF Service Chains Routing",
+        "nfv_density-dcr_memif-pipeline": "CNF Service Pipelines Routing",
+        "nfv_density-dcr_memif-chain": "CNF Service Chains Routing",
+    }
+
+    # URL style.
+    URL_STYLE = {
+        "background-color": "#d2ebf5",
+        "border-color": "#bce1f1",
+        "color": "#135d7c"
+    }
+
+    ############################################################################
+    # General, normalization constants.
+
+    NORM_FREQUENCY = 2.0  # [GHz]
+    FREQUENCY = {  # [GHz]
+        "2n-aws": 1.000,
+        "2n-dnv": 2.000,
+        "2n-clx": 2.300,
+        "2n-icx": 2.600,
+        "2n-skx": 2.500,
+        "2n-tx2": 2.500,
+        "2n-zn2": 2.900,
+        "3n-alt": 3.000,
+        "3n-aws": 1.000,
+        "3n-dnv": 2.000,
+        "3n-icx": 2.600,
+        "3n-skx": 2.500,
+        "3n-tsh": 2.200
+    }
+
+    ############################################################################
+    # General, plots constants.
+
+    PLOT_COLORS = (
+        "#1A1110", "#DA2647", "#214FC6", "#01786F", "#BD8260", "#FFD12A",
+        "#A6E7FF", "#738276", "#C95A49", "#FC5A8D", "#CEC8EF", "#391285",
+        "#6F2DA8", "#FF878D", "#45A27D", "#FFD0B9", "#FD5240", "#DB91EF",
+        "#44D7A8", "#4F86F7", "#84DE02", "#FFCFF1", "#614051"
+    )
+
+    # Trending, anomalies.
+    ANOMALY_COLOR = {
+        "regression": 0.0,
+        "normal": 0.5,
+        "progression": 1.0
+    }
+
+    COLORSCALE_TPUT = [
+        [0.00, "red"],
+        [0.33, "red"],
+        [0.33, "white"],
+        [0.66, "white"],
+        [0.66, "green"],
+        [1.00, "green"]
+    ]
+
+    TICK_TEXT_TPUT = ["Regression", "Normal", "Progression"]
+
+    COLORSCALE_LAT = [
+        [0.00, "green"],
+        [0.33, "green"],
+        [0.33, "white"],
+        [0.66, "white"],
+        [0.66, "red"],
+        [1.00, "red"]
+    ]
+
+    TICK_TEXT_LAT = ["Progression", "Normal", "Regression"]
+
+    # Access to the results.
+    VALUE = {
+        "mrr": "result_receive_rate_rate_avg",
+        "ndr": "result_ndr_lower_rate_value",
+        "pdr": "result_pdr_lower_rate_value",
+        "pdr-lat": "result_latency_forward_pdr_50_avg"
+    }
+
+    VALUE_ITER = {
+        "mrr": "result_receive_rate_rate_values",
+        "ndr": "result_ndr_lower_rate_value",
+        "pdr": "result_pdr_lower_rate_value",
+        "pdr-lat": "result_latency_forward_pdr_50_avg"
+    }
+
+    UNIT = {
+        "mrr": "result_receive_rate_rate_unit",
+        "ndr": "result_ndr_lower_rate_unit",
+        "pdr": "result_pdr_lower_rate_unit",
+        "pdr-lat": "result_latency_forward_pdr_50_unit"
+    }
+
+    # Latencies.
+    LAT_HDRH = (  # Do not change the order
+        "result_latency_forward_pdr_0_hdrh",
+        "result_latency_reverse_pdr_0_hdrh",
+        "result_latency_forward_pdr_10_hdrh",
+        "result_latency_reverse_pdr_10_hdrh",
+        "result_latency_forward_pdr_50_hdrh",
+        "result_latency_reverse_pdr_50_hdrh",
+        "result_latency_forward_pdr_90_hdrh",
+        "result_latency_reverse_pdr_90_hdrh",
+    )
+
+    # This value depends on latency stream rate (9001 pps) and duration (5s).
+    # Keep it slightly higher to ensure rounding errors to not remove tick mark.
+    PERCENTILE_MAX = 99.999501
+
+    GRAPH_LAT_HDRH_DESC = {
+        "result_latency_forward_pdr_0_hdrh": "No-load.",
+        "result_latency_reverse_pdr_0_hdrh": "No-load.",
+        "result_latency_forward_pdr_10_hdrh": "Low-load, 10% PDR.",
+        "result_latency_reverse_pdr_10_hdrh": "Low-load, 10% PDR.",
+        "result_latency_forward_pdr_50_hdrh": "Mid-load, 50% PDR.",
+        "result_latency_reverse_pdr_50_hdrh": "Mid-load, 50% PDR.",
+        "result_latency_forward_pdr_90_hdrh": "High-load, 90% PDR.",
+        "result_latency_reverse_pdr_90_hdrh": "High-load, 90% PDR."
+    }
+
+    ############################################################################
+    # News.
+
+    # The pathname prefix for the application.
+    NEWS_ROUTES_PATHNAME_PREFIX = "/news/"
+
+    # Path and name of the file specifying the HTML layout of the dash
+    # application.
+    NEWS_HTML_LAYOUT_FILE = "pal/templates/news_layout.jinja2"
+
+    # The default job displayed when the page is loaded first time.
+    NEWS_DEFAULT_JOB = "csit-vpp-perf-mrr-daily-master-2n-icx"
+
+    # Time period for regressions and progressions.
+    NEWS_TIME_PERIOD = 21  # [days]
+
+    ############################################################################
+    # Report.
+
+    # The pathname prefix for the application.
+    REPORT_ROUTES_PATHNAME_PREFIX = "/report/"
+
+    # Path and name of the file specifying the HTML layout of the dash
+    # application.
+    REPORT_HTML_LAYOUT_FILE = "pal/templates/report_layout.jinja2"
+
+    # Layout of plot.ly graphs.
+    REPORT_GRAPH_LAYOUT_FILE = "pal/report/layout.yaml"
+
+    ############################################################################
+    # Statistics.
+
+    # The pathname prefix for the application.
+    STATS_ROUTES_PATHNAME_PREFIX = "/stats/"
+
+    # Path and name of the file specifying the HTML layout of the dash
+    # application.
+    STATS_HTML_LAYOUT_FILE = "pal/templates/stats_layout.jinja2"
+
+    # Layout of plot.ly graphs.
+    STATS_GRAPH_LAYOUT_FILE = "pal/stats/layout.yaml"
+
+    # The default job displayed when the page is loaded first time.
+    STATS_DEFAULT_JOB = "csit-vpp-perf-mrr-daily-master-2n-icx"
+
+    ############################################################################
+    # Trending.
+
+    # The pathname prefix for the application.
+    TREND_ROUTES_PATHNAME_PREFIX = "/trending/"
+
+    # Path and name of the file specifying the HTML layout of the dash
+    # application.
+    TREND_HTML_LAYOUT_FILE = "pal/templates/trending_layout.jinja2"
+
+    # Layout of plot.ly graphs.
+    TREND_GRAPH_LAYOUT_FILE = "pal/trending/layout.yaml"
diff --git a/resources/tools/dash/app/pal/data/tooltips.yaml b/resources/tools/dash/app/pal/utils/tooltips.yaml
index 2086b575a9..2086b575a9 100644
--- a/resources/tools/dash/app/pal/data/tooltips.yaml
+++ b/resources/tools/dash/app/pal/utils/tooltips.yaml
diff --git a/resources/tools/dash/app/pal/data/url_processing.py b/resources/tools/dash/app/pal/utils/url_processing.py
index 9307015d0d..9307015d0d 100644
--- a/resources/tools/dash/app/pal/data/url_processing.py
+++ b/resources/tools/dash/app/pal/utils/url_processing.py
diff --git a/resources/tools/dash/app/pal/data/utils.py b/resources/tools/dash/app/pal/utils/utils.py
index 63c9c1aaa4..63c9c1aaa4 100644
--- a/resources/tools/dash/app/pal/data/utils.py
+++ b/resources/tools/dash/app/pal/utils/utils.py