Bug 2151291

Description of problem (please be detailed as possible and provide log
snippests):
This BZ is subset of https://bugzilla.redhat.com/show_bug.cgi?id=2026144 for tracking the enhancement on IOPS, Throughput & Latency values to match with ODF Overview page and Overview Block & File page. 

During backport verification of BZ https://bugzilla.redhat.com/show_bug.cgi?id=2124282 observed Latency difference around ~2ms, after discussion with dev came to know about the comment from Arun https://bugzilla.redhat.com/show_bug.cgi?id=2026144#c20 on why this difference or mismatch.

Copying comments from BZ 2026144#c20

ODF Overview page graphs (IOPS, Throughput and Latency) shows the sum of Read+Writes of I/O when compared with the separate Read and Write graphs in StorageSystem's -> Overview Block & File page. So both set of graphs won't have a one to one correlation.

For,
IOPS
      ODF Overview page and StorageSystem Overview page has different time intervals.

Throughput
      Underlying queries are different with different collection interval.

Latency
     Again two totally different queries (where one taking an average and the other taking sum).

For IOPS we can correct the time interval and make it same and for the other two need to check/investigate a bit further on the queries.


Version of all relevant components (if applicable):


Does this issue impact your ability to continue to work with the product
(please explain in detail what is the user impact)?
NA

Is there any workaround available to the best of your knowledge?
NA

Rate from 1 - 5 the complexity of the scenario you performed that caused this
bug (1 - very simple, 5 - very complex)?
1

Can this issue reproducible?
Yes

Can this issue reproduce from the UI?
Yes

If this is a regression, please provide more details to justify this:


Steps to Reproduce:
Install odf operator
2. Create storagesystem
3. Navigate to ODF tab under Storage, on Overview page, check the values of IOPS, Throughput, Latency from Performance card and Used Capacity value from System Capacity card on this page.
4. Match these values against the values listed in Utilization card on Block and File tab. Click on ocs-storagecluster-storagesystem hyperlink from Performace card on Overview page to navigate to Block and File tab.

Actual results:
There is difference in values for IOPS, Throughput and Latency between ODF Overview page and Overview Block & File page

Expected results:
Values of IOPS, Throughput and Latency between ODF Overview page and Overview Block & File page should match.

Additional info:
NA