Bug 1959178

Summary:	[RFE] Enhance "Image cache state" section of "rbd status" (persistent writeback cache)
Product:	[Red Hat Storage] Red Hat Ceph Storage	Reporter:	Ilya Dryomov <idryomov>
Component:	RBD	Assignee:	Ilya Dryomov <idryomov>
Status:	CLOSED ERRATA	QA Contact:	Preethi <pnataraj>
Severity:	high	Docs Contact:	Mary Frances Hull <mhull>
Priority:	unspecified
Version:	5.0	CC:	ceph-eng-bugs, flucifre, gpatta, mmurthy, owasserm, rmandyam, sostapov, tserlin, vereddy
Target Milestone:	---	Keywords:	FutureFeature
Target Release:	5.1z1
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	ceph-16.2.7-104.el8cp	Doc Type:	Enhancement
Doc Text:	.Users can now view more details in the `Persistent cache state` section With this release, the `rbd status` command provides more details in the `Persistent cache state` section such as whether the cache is present, and other metrics such as the number of bytes used, hits, and misses.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-05-18 10:38:15 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2085458

Comment 1 RHEL Program Management 2021-05-10 20:17:14 UTC

Please specify the severity of this bug. Severity is defined here:
https://bugzilla.redhat.com/page.cgi?id=fields.html#bug_severity.

Comment 3 Ilya Dryomov 2022-03-22 18:12:26 UTC

*** Bug 2066770 has been marked as a duplicate of this bug. ***

Comment 4 Federico Lucifredi 2022-03-29 02:52:06 UTC

let's target 5.1z1 or the async that has been under discussion for April. Assuming, that is, that we have a fix quickly enough to.

Comment 11 Preethi 2022-04-19 09:56:27 UTC

Thanks IIya. was able to get the values for cache misses as below when read is performed when cache is flushed to the OSD. 

    misses: 108
    miss_bytes: 3.4 MiB

Comment 17 errata-xmlrpc 2022-05-18 10:38:15 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Red Hat Ceph Storage 5.1 Bug Fix update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2022:4622