Bug 2227309

Summary:	RFE: change default value of "mds_bal_interval" to "0", aka false
Product:	[Red Hat Storage] Red Hat Ceph Storage	Reporter:	Manny <mcaldeir>
Component:	CephFS	Assignee:	Patrick Donnelly <pdonnell>
Status:	ASSIGNED ---	QA Contact:	Hemanth Kumar <hyelloji>
Severity:	high	Docs Contact:
Priority:	high
Version:	5.3	CC:	ceph-eng-bugs, cephqe-warriors, pdonnell
Target Milestone:	---	Keywords:	FutureFeature
Target Release:	7.1
Hardware:	Unspecified
OS:	Unspecified
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Description Manny 2023-07-28 16:42:52 UTC

Description of problem:  RFE: change default value of "mds_bal_interval" to "0", aka false

From case 03492882 and BZ (https://bugzilla.redhat.com/show_bug.cgi?id=2203258) we see that having "mds_bal_interval" enabled results in performance issue. Beyond the log evidence in BZ 2203258, the customer reports that Ceph FS latency has dropped by 75 percent and I/O in the cluster has doubled since "mds_bal_interval" was set to false on their system.

We'd like to see the change in 5.3z-whatever and 6.1z-whatever and beyond

See also KCS #7026124, (https://access.redhat.com/solutions/7026124)

This same customer commented if this feature hampers performance this much and there is no intention on fixing it, the default value should be changed.


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