Bug 2223388 - [RFE][Bluestore] add perf counters for bluefs allocation size strategy change [NEEDINFO]
Summary: [RFE][Bluestore] add perf counters for bluefs allocation size strategy change
Keywords:
Status: NEW
Alias: None
Product: Red Hat Ceph Storage
Classification: Red Hat Storage
Component: RADOS
Version: 6.1
Hardware: Unspecified
OS: Unspecified
unspecified
medium
Target Milestone: ---
: 6.1z2
Assignee: Radoslaw Zarzynski
QA Contact: Pawan
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2023-07-17 14:49 UTC by Tomas Petr
Modified: 2023-07-20 07:20 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: Enhancement
Doc Text:
Clone Of:
Environment:
Last Closed:
Embargoed:
akupczyk: needinfo? (tpetr)


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System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHCEPH-7019 0 None None None 2023-07-17 14:49:44 UTC

Description Tomas Petr 2023-07-17 14:49:18 UTC
Description of problem:
BlueFS can automatically change allocation size from 64K to 4K 
due to possible performance impact or in general for being able to check without increased debug logging enabled, we would like to have easy option to see what BlueFS allocation strategy is being used by the OSD at this moment, or if it has been used in the past

The way to achieve it could be to add OSD perf counters with values like:
 - counter how many times allocation strategy changed
 - current allocation strategy (or something like 4K_alloc_size_strategy = true/false or 1/0 for current strategy)
 - last timestamp of the strategy change 
 

Version-Release number of selected component (if applicable):
RHCS 6.1+

How reproducible:


Steps to Reproduce:
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Actual results:


Expected results:


Additional info:

Comment 1 Scott Ostapovicz 2023-07-17 14:51:51 UTC
incorrectly targeted at 6.1 z1, retargeting to 6.1 z2.


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