Bug 1505457

Summary:	degraded object calcuation is wrong/misleading
Product:	[Red Hat Storage] Red Hat Ceph Storage	Reporter:	Sage Weil <sweil>
Component:	RADOS	Assignee:	Josh Durgin <jdurgin>
Status:	CLOSED UPSTREAM	QA Contact:	ceph-qe-bugs <ceph-qe-bugs>
Severity:	medium	Docs Contact:	Erin Donnelly <edonnell>
Priority:	unspecified
Version:	3.0	CC:	ceph-eng-bugs, dzafman, edonnell, jdurgin, kchai, kdreyer, sweil
Target Milestone:	rc
Target Release:	3.*
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Known Issue
Doc Text:	.During a data rebalance of a Ceph cluster, the system might report degraded objects Under certain circumstances, such as when an OSD is marked out, the number of degraded objects reported during a data rebalance of a Ceph cluster can be too high, in some cases implying a problem where none exists.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-01-23 15:31:00 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:	1494421

Description Sage Weil 2017-10-23 15:47:50 UTC

Description of problem:

During a data rebalance (no failed OSDs), the system may report degraded objects.  This is alarming and misleading (redundancy is not in fact degraded).  Trivially reproducible on a cluster under any load.

How reproducible:

Easy

Steps to Reproduce:
1. ceph osd pool create foo 64
2. rados -p foo bench 30 write -b 4096 --no-cleanup
3. ceph osd out 0
4. rados -p foo bench 30 write -b 4096 --no-cleanup &
5. watch ceph -s

Actual results:

Shows degraded objects

Expected results:

Only misplaced objects should be shown.

Comment 3 Sage Weil 2017-10-23 15:56:32 UTC

upstream PR: https://github.com/ceph/ceph/pull/18297

Comment 9 Yaniv Kaul 2019-01-23 14:06:08 UTC

(In reply to Sage Weil from comment #3)
> upstream PR: https://github.com/ceph/ceph/pull/18297

This was merged ~1.5 years ago. Can we CLOSE-UPSTREAM this?

Comment 10 Red Hat Bugzilla 2023-09-15 00:04:43 UTC

The needinfo request[s] on this closed bug have been removed as they have been unresolved for 500 days