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Backport #18095

jewel: Improve deep-scrub performance with many snapshots

Added by David Zafman about 3 years ago. Updated about 3 years ago.

Status:
Resolved
Priority:
Urgent
Assignee:
Target version:
Release:
jewel


Related issues

Copied from Ceph - Feature #17470: Improve deep-scrub performance with many snapshots Resolved 10/01/2016

History

#1 Updated by David Zafman about 3 years ago

  • Copied from Feature #17470: Improve deep-scrub performance with many snapshots added

#2 Updated by David Zafman about 3 years ago

  • Status changed from New to Resolved

16f9d95204f3eca6908ae241e5bacc48b006cb23

https://github.com/ceph/ceph/pull/11311

#3 Updated by Nathan Cutler about 3 years ago

  • Tracker changed from Feature to Backport
  • Description updated (diff)
  • Release set to jewel

original description

This is accomplished by improving the scrub boundary requirements, so that we don't have a scrub an entire hash value. Now we never need to exceed the osd_scrub_chunk_max value which was causing performance degradation.

Due to the transition to bitwise object sorting we have to handle converting the ScrubMap which was suing BitWise sorting even if NibbleWise is currently in use. Note that the hammer backport will not need this part of the change.

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