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Bug 2376164

Summary:	[8.1z Backport] [IBM_Support] File splitting and file moves on cephfs subvolume are slow
Product:	[Red Hat Storage] Red Hat Ceph Storage	Reporter:	Bipin Kunal <bkunal>
Component:	CephFS	Assignee:	Venky Shankar <vshankar>
Status:	CLOSED DUPLICATE	QA Contact:	Manimaran M <manim>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	7.1	CC:	ceph-eng-bugs, cephqe-warriors, lithomas, ngangadh, vereddy
Target Milestone:	---
Target Release:	8.1z2
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2025-07-24 13:54:39 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2371495
Bug Blocks:

Description Bipin Kunal 2025-07-03 14:16:19 UTC

This bug was initially created as a copy of Bug #2371495

I am copying this bug because: 



Description of problem:
Customer is experiencing a significant degraded performance when executing a file split/move operation (1 million line file is split into 50,000 files) and files are moved to different directories

Version-Release number of selected component (if applicable):
ceph 18.2.1-298 (7.1z3)
odf  4.14.17

How reproducible:
Always at the customer site.  This is occurring in 3 of the 4 clusters.

Steps to Reproduce:
1. Receive 4 1 million line files from mainframe
2. Execute a split/move operation to break up 1 of the million line file into 50,000 files and move files to different directories.


Actual results:
File splits and moves are significantly slower than they were prior to the upgrade.

Expected results:
File splits and moves should produce similar performance as on the older version. 

Additional info:
The cluster which does not experience the issue is running older version of ceph/odf/ocp version (4.12)

Comment 1 Storage PM bot 2025-07-03 14:16:30 UTC

Please specify the severity of this bug. Severity is defined here:
https://bugzilla.redhat.com/page.cgi?id=fields.html#bug_severity.