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Feature #58550
closedFeature #58488: mds: avoid encoding srnode for each ancestor in an EMetaBlob log event
mds: add perf counter to track (relatively) larger log events
Status:
Resolved
Priority:
Normal
Assignee:
Category:
Administration/Usability
Target version:
% Done:
0%
Source:
Development
Backport:
Reviewed:
Affected Versions:
Component(FS):
MDS
Labels (FS):
Pull request ID:
Tags (freeform):
Merge Commit:
Fixed In:
v18.0.0-5280-gcd18c51548a
Released In:
v19.2.0~1891
Upkeep Timestamp:
2025-07-12T19:07:38+00:00
Description
Logging of large (in size) subtreemap over and over again in the log segment is a well know scalability limiting factor in the MDS. Its a bit hard to infer this though when a cluster starts experiencing slowness. Moreover, there might be other places where a large log event size could be making things worse. Adding a perf counter that increments whenever the log event size exceeds a certain threshold might help is inferring the extent of logging large log events over and over again.
Updated by Venky Shankar about 3 years ago
- Category set to Administration/Usability
- Assignee set to Patrick Donnelly
Updated by Patrick Donnelly about 3 years ago
- Status changed from New to In Progress
Updated by Patrick Donnelly about 3 years ago
- Status changed from In Progress to Fix Under Review
- Pull request ID set to 48732
Updated by Patrick Donnelly over 2 years ago
- Status changed from Fix Under Review to Resolved
- Target version changed from v18.0.0 to v19.0.0
- Source set to Development
- Backport deleted (
pacific,quincy)
Not planning to backport this the minor log segment PR.
Updated by Upkeep Bot 8 months ago
- Merge Commit set to cd18c51548ac1d3b84743ee73f5d15b31eb625ac
- Fixed In set to v18.0.0-5280-gcd18c51548a
- Released In set to v19.2.0~1891
- Upkeep Timestamp set to 2025-07-12T19:07:38+00:00
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