Bug #37784
Empty pg_temps are added to incremental map even if there're no changes in new epoch
Status:
Resolved
Priority:
Normal
Assignee:
-
Category:
Monitor
Target version:
-
% Done:
0%
Source:
Tags:
Backport:
luminous,mimic
Regression:
No
Severity:
3 - minor
Reviewed:
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
History
#1 Updated by xie xingguo about 5 years ago
- Backport changed from luminous to luminous,mimic
#2 Updated by xie xingguo about 5 years ago
- Pull request ID set to 25780
#3 Updated by xie xingguo about 5 years ago
- Status changed from New to Pending Backport
#4 Updated by Nathan Cutler about 5 years ago
- Copied to Backport #37810: mimic: Empty pg_temps are added to incremental map even if there're no changes in new epoch added
#5 Updated by Nathan Cutler about 5 years ago
- Copied to Backport #37811: luminous: Empty pg_temps are added to incremental map even if there're no changes in new epoch added
#6 Updated by Nathan Cutler about 5 years ago
- Status changed from Pending Backport to Resolved