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Bug 1205301

Summary: crush straw bucket problems
Product: [Red Hat Storage] Red Hat Ceph Storage Reporter: Sage Weil <sweil>
Component: RADOSAssignee: Ken Dreyer (Red Hat) <kdreyer>
Status: CLOSED WONTFIX QA Contact: ceph-qe-bugs <ceph-qe-bugs>
Severity: urgent Docs Contact:
Priority: unspecified    
Version: 1.2.3CC: ceph-eng-bugs, dzafman, flucifre, icolle, kchai, kdreyer, nlevine, tmuthami
Target Milestone: rc   
Target Release: 1.2.4   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-11-30 16:47:17 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: 1271774    
Bug Blocks:    

Description Sage Weil 2015-03-24 16:21:07 UTC 
Description of problem:

straw buckets behave badly when weights are 0, or when weights are duplicated.

See upstream bugs
 http://tracker.ceph.com/issues/10214
 http://tracker.ceph.com/issues/9998

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


How reproducible:

100%

Steps to Reproduce:
1. bucket with mix of non-zero and zero weight items
2. change a 0 weight item to .001

Actual results:

lots of data moves

Expected results:

little data moves

Additional info:

fixed in upstream 0.80.9
Comment 1 Neil Levine 2015-03-24 16:33:41 UTC 
Needs to be shipped in an async errata ASAP.
Comment 2 Sage Weil 2015-03-25 17:47:19 UTC 
This does not need an async update.  It can go in 1.2.4 (whenever that may be).
Comment 3 Federico Lucifredi 2015-03-26 01:17:54 UTC 
Re-targeting at 1.3. Setting flags accordingly.
Comment 4 Neil Levine 2015-03-26 03:52:41 UTC 
This might be one of those tickets which doesn't need to be so explicit given we will be rebasing on Hammer and bringing this - and a bunch of other things - in en masse.
Comment 5 Ken Dreyer (Red Hat) 2015-04-11 00:49:25 UTC 
I'd like to keep this targeted at 1.2.4 for now. Neil's right; for the 1.3 version, Bug 1210037 ("rebase ceph to 0.94") will take care of this.
Comment 6 Ken Dreyer (Red Hat) 2015-10-19 19:14:35 UTC 
We'll take in in as part of the RHCS 1.2 rebase to Ceph v0.80.11 (bz 1271774)
Comment 7 Boris Ranto 2015-11-26 11:01:21 UTC 
@Ken: Since you'll do the rebase, I'm reassigning to you.
Comment 8 Ken Dreyer (Red Hat) 2015-11-30 16:47:17 UTC 
The fix is for users to upgrade to RHCeph 1.3.