Bug #37784: Empty pg_temps are added to incremental map even if there're no changes in new epoch - Ceph - Ceph

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Bug #37784

closed

Empty pg_temps are added to incremental map even if there're no changes in new epoch

Added by Aleksei Zakharov over 5 years ago. Updated about 5 years ago.

Status:

Resolved

Priority:

Normal

Assignee:

Category:

Monitor

Target version:

% Done:

Source:

Tags:

Backport:

luminous,mimic

Regression:

Severity:

3 - minor

Reviewed:

Affected Versions:

v12.2.0, v12.2.1, v12.2.10, v12.2.11, v12.2.2, v12.2.3, v12.2.4, v12.2.5, v12.2.6, v12.2.7, v12.2.8, v12.2.9, v13.0.0, v13.2.0, v13.2.1, v13.2.2, v13.2.3, v14.0.0

ceph-qa-suite:

Pull request ID:

25780

Crash signature (v1):

Crash signature (v2):

Description

Due to commit ea723fbb88c69bd00fefd32a3ee94bf5ce53569c
pg_temp with clean acting set are added to inc map.
It happens even if up next up acting == next acting.
This results in huge amount of pg_temps and traffic (and cpu consumption) spikes
when epoch is incremented on a large cluster.

This behavior could be reproduced by reweighting osd
to it's actual weight.

This behavior was mentioned in ceph-users mailing list: https://www.spinics.net/lists/ceph-users/msg50138.html

Related issues 2 (0 open — 2 closed)