Bug 2239433

Summary: [RHCS 5.3][Slower bucket listing in RHCS 5.3z1 after resharding]
Product: [Red Hat Storage] Red Hat Ceph Storage Reporter: nravinas
Component: RGWAssignee: J. Eric Ivancich <ivancich>
Status: CLOSED ERRATA QA Contact: Madhavi Kasturi <mkasturi>
Severity: high Docs Contact: Ranjini M N <rmandyam>
Priority: unspecified    
Version: 5.3CC: ceph-eng-bugs, cephqe-warriors, ckulal, ivancich, kdreyer, mkasturi, rmandyam, tserlin
Target Milestone: ---   
Target Release: 5.3z6   
Hardware: Unspecified   
OS: Linux   
Whiteboard:
Fixed In Version: ceph-16.2.10-218.el8cp Doc Type: Enhancement
Doc Text:
.Enhanced ordered bucket listing Previously, in some cases, buckets with larger number of shards and several pseudo-subdirectories would take an unnecessarily long time to complete. With this enhancement, such buckets perform an ordered bucket listing more quickly.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2024-02-08 16:55:19 UTC Type: Bug
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:    
Bug Blocks: 2258797    

Description nravinas 2023-09-18 11:31:52 UTC 
Description of problem:

Slower bucket listing in RHCS buckets after resharding, compared to RHCS 4:

- RHCS 4: 11 shards, bucket with 4.1M objects - listing takes 5 seconds.
- RHCS 5: 97 shards, bucket with 3.8M objects - listing takes 20 seconds.

The bucket contents are very similar between both Ceph versions, as the bucket in RHCS 5 was initially migrated from the cluster running RHCS 4. The RHCS 5 cluster runs on servers with more memory, CPU, and networking resources, so the hardware configuration doesn't explain this difference. 

Version-Release number of selected component (if applicable):

RHCS 5.3z1

How reproducible:

At the customer's site. 

Actual results:

Bucket listing is slower in RHCS 5 than in RHCS 4 after resharding. 

Expected results:

Bucket listing should be faster in RHCS 5. 

Additional info:

Please see the complete description of this issue and the tests done in the following comments.
Comment 32 errata-xmlrpc 2024-02-08 16:55:19 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Moderate: Red Hat Ceph Storage 5.3 Security update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2024:0745