[Bug 2013960] [NEW] Recovery operation takes high priority than client I/O with mclock scheduler

[Ponnuvel Palaniyappan]

Public bug reported:

Starting with Quincy, the mclock_scheduler is used as default. However,
the default recovery settings are very high that it the impact on client
I/O can be really high depending on the amount of recovery operations
needed to be done.

Affects Quincy only.

There's no upstream Quincy release with this fix yet.
17.2.6 will have this fix which is undergoing QA at the moment.

Upstream bug: https://tracker.ceph.com/issues/57529
Upstream fix: https://github.com/ceph/ceph/pull/48226

** Affects: ceph (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: sts

** Tags added: sts

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https://bugs.launchpad.net/bugs/2013960

Title:
  Recovery operation takes high priority than client I/O with mclock
  scheduler

Status in ceph package in Ubuntu:
  New

Bug description:
  Starting with Quincy, the mclock_scheduler is used as default.
  However, the default recovery settings are very high that it the
  impact on client I/O can be really high depending on the amount of
  recovery operations needed to be done.

  Affects Quincy only.

  There's no upstream Quincy release with this fix yet.
  17.2.6 will have this fix which is undergoing QA at the moment.

  Upstream bug: https://tracker.ceph.com/issues/57529
  Upstream fix: https://github.com/ceph/ceph/pull/48226

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