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Bug #12946

Heavy memory shuffling in rados bench

Added by Piotr Dalek over 7 years ago. Updated almost 7 years ago.

Status:
Resolved
Priority:
Normal
Assignee:
Category:
common
Target version:
-
% Done:

0%

Source:
Community (dev)
Tags:
Backport:
hammer
Regression:
No
Severity:
3 - minor
Reviewed:
Affected Versions:
ceph-qa-suite:
Pull request ID:
Crash signature (v1):
Crash signature (v2):

Description

"rados bench"'s max performance is capped by memory buffer shuffling, and it is particularly bad on fast SSDs/ramdisks.
Reuse existing buffer instead of constantly deleting and recreating it, so the performance is no longer capped by rados.

Fixed in master/infernalis (https://github.com/ceph/ceph/pull/4690).
NOTE: this fix will trigger bug in obj_bencher.ccc (fixed in https://github.com/ceph/ceph/pull/5152).


Related issues

Related to Ceph - Fix #12947: Race condition in rados bench Resolved 09/04/2015
Copied to Ceph - Backport #12948: Heavy memory shuffling in rados bench Resolved

History

#2 Updated by Loïc Dachary over 7 years ago

  • Status changed from New to Pending Backport

#3 Updated by Loïc Dachary over 7 years ago

  • Assignee set to Piotr Dalek

#4 Updated by Loïc Dachary almost 7 years ago

  • Status changed from Pending Backport to Resolved

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