[Bug 1871820] Re: luminous: bluestore rocksdb max_background_compactions regression in 12.2.13

[James Page]

xenial-queens/proposed

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Totals
======
Ran: 92 tests in 707.9748 sec.
 - Passed: 84
 - Skipped: 8
 - Expected Fail: 0
 - Unexpected Success: 0
 - Failed: 0
Sum of execute time for each test: 897.0776 sec.

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https://bugs.launchpad.net/bugs/1871820

Title:
  luminous: bluestore rocksdb max_background_compactions regression in
  12.2.13

Status in Ceph:
  Unknown
Status in ceph package in Ubuntu:
  Invalid
Status in ceph source package in Bionic:
  Fix Committed

Bug description:
  There is a potential regression in the rocksdb
  max_background_compactions change in the 12.2.13 point release that is
  in bionic-proposed.

  https://tracker.ceph.com/issues/44937 was raised as the rocksdb
  version in the bionic ceph source does not contain:

    https://github.com/facebook/rocksdb/pull/3926

  which ensures that any overlap between background compactions is
  detected and handled.

  We either need to revert to a single background compaction as the
  default setting, or pick the fix into the rocksdb source in
  src:ceph/bionic

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