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Bug #18749

OSD: allow EC PGs to do recovery below min_size

Added by Greg Farnum over 2 years ago. Updated about 2 months ago.

Status:
Resolved
Priority:
High
Assignee:
-
Category:
EC Pools
Target version:
-
Start date:
01/31/2017
Due date:
% Done:

0%

Source:
Tags:
Backport:
Regression:
No
Severity:
3 - minor
Reviewed:
Affected Versions:
ceph-qa-suite:
Component(RADOS):
OSD
Pull request ID:

Description

PG::choose_acting has a stanza which prevents EC PGs from peering if they are below min_size because, at the time, Sam was worried about committing to an update without having min_size OSDs present.
He says we ought to be able to disable this now that recovery below min_size works at all, but of course it will need stringent testing.

History

#2 Updated by Chang Liu over 2 years ago

https://trello.com/c/5q8YSNtu

I am willing to solve this problem

#3 Updated by Greg Farnum about 2 years ago

  • Project changed from Ceph to RADOS
  • Category changed from OSD to EC Pools
  • Priority changed from Normal to High
  • Component(RADOS) OSD added

#4 Updated by Chang Liu almost 2 years ago

https://github.com/ceph/ceph/pull/17619

Greg Farnum, would you mind taking a look?

#5 Updated by Greg Farnum almost 2 years ago

  • Status changed from New to Need Test

I still owe teuthology tests on this...

#6 Updated by Sage Weil 8 months ago

/a/sage-2019-01-01_04:27:00-rados-wip-sage-testing-2018-12-31-1546-distro-basic-smithi/3410708

#7 Updated by Greg Farnum 3 months ago

  • Assignee deleted (Greg Farnum)

#8 Updated by Torben Hørup 2 months ago

I think it would make sense to create a note on this recovery limitation in the documentation http://docs.ceph.com/docs/master/rados/operations/erasure-code/ and have it backported to luminous+mimic+nautilus ?

#9 Updated by Kefu Chai about 2 months ago

  • Status changed from Need Test to Resolved

#10 Updated by Torben Hørup about 2 months ago

Will this be backported ?

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