Feature #51213: [ceph osd set noautoscale] Global on/off flag for PG autoscale feature - RADOS - Ceph

Feature #51213

[ceph osd set noautoscale] Global on/off flag for PG autoscale feature

Added by Vikhyat Umrao about 2 years ago. Updated over 1 year ago.

Status:

Resolved

Priority:

Normal

Assignee:

Kamoltat (Junior) Sirivadhna

Category:

Target version:

% Done:

Source:

Tags:

Backport:

pacific

Reviewed:

Affected Versions:

Component(RADOS):

Pull request ID:

43716

Description

For now, we do not have a global flag, like `ceph osd set noout` for the pg autoscale feature. We have pool flags¹ for making this feature on and off.
It would be good to have a flag² that could be a global flag and it should not touch or override pool level configuration like on/off status or any custom tuning.

This global flag will help during upgrades when we are bouncing the OSD's or any kind of cluster maintenance/OSD maintenance. Because during these activities we do not want the pg-autoscale feature to cause peering/recovery/backfills etc. We can simply set the flag before these activities and once the activity will complete just unset it.

[1] https://docs.ceph.com/en/latest/rados/operations/placement-groups/#autoscaling-placement-groups
[2] `ceph osd set noautoscale` and `ceph osd unset noautoscale`

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