[Bug 1945819] Re: Octopus: Performance issue with HybridAllocator

James Page 1945819 at bugs.launchpad.net
Fri Mar 18 16:07:05 UTC 2022


These fixes are included in 15.2.16 - see bug 1964802

** Changed in: ceph (Ubuntu)
       Status: New => Won't Fix

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https://bugs.launchpad.net/bugs/1945819

Title:
  Octopus: Performance issue with HybridAllocator

Status in ceph package in Ubuntu:
  Won't Fix

Bug description:
  Opening to track upstream issue https://tracker.ceph.com/issues/52804

  Issue is HybridAllocator tail latency observed in clusters with NVMe
  OSDs after upgrade to Octopus from Mimic.

  The allocator default was switched to "hybrid" from "bitmap" by
  upstream. Switching the OSDs back to the bitmap allocator removed the
  observed tail latency.

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