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Fix #58023
openmds: do not evict clients if OSDs are laggy
Status:
Pending Backport
Priority:
High
Assignee:
Category:
Correctness/Safety
Target version:
% Done:
0%
Source:
Development
Tags:
backport_processed
Backport:
reef,quincy,pacific
Reviewed:
Affected Versions:
ceph-qa-suite:
Description
Monitoring perf dumps from the MDS can sometimes show that OSDs are laggy, "objecter.op_laggy" and "objecter.osd_laggy". This can indicate the cause for laggy clients (cannot flush dirty data for cap revokes).
In Server::find_idle_sessions, if the MDS detects laggy OSDs, defer evicting/removing "laggy" client sessions until OSDs are no longer laggy. Log a warning to the cluster indicating the situation.
Updated by Venky Shankar over 1 year ago
- Category set to Correctness/Safety
- Assignee set to Dhairya Parmar
Updated by Dhairya Parmar about 1 year ago
- Status changed from New to In Progress
- Pull request ID set to 49971
Updated by Dhairya Parmar 11 months ago
- Status changed from In Progress to Fix Under Review
Updated by Venky Shankar 10 months ago
- Status changed from Fix Under Review to Pending Backport
- Target version changed from v18.0.0 to v19.0.0
- Backport changed from quincy,pacific to reef,quincy,pacific
Updated by Backport Bot 10 months ago
- Copied to Backport #61840: quincy: mds: do not evict clients if OSDs are laggy added
Updated by Backport Bot 10 months ago
- Copied to Backport #61841: pacific: mds: do not evict clients if OSDs are laggy added
Updated by Backport Bot 10 months ago
- Copied to Backport #61842: reef: mds: do not evict clients if OSDs are laggy added
Updated by Venky Shankar about 1 month ago
- Related to Bug #64563: mds: enhance laggy clients detections due to laggy OSDs added
Updated by Venky Shankar about 1 month ago
- Related to Bug #64685: mds: disable defer_client_eviction_on_laggy_osds by default added
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