Bug 2299482
| Summary: | [Workload-DFG][mClock] Inconsistent client throughput during recovery with mClock balanced profile | ||
|---|---|---|---|
| Product: | [Red Hat Storage] Red Hat Ceph Storage | Reporter: | Vikhyat Umrao <vumrao> |
| Component: | RADOS | Assignee: | Sridhar Seshasayee <sseshasa> |
| Status: | CLOSED ERRATA | QA Contact: | skanta |
| Severity: | high | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 7.1 | CC: | bhubbard, ceph-eng-bugs, cephqe-warriors, hakumar, kbader, mcaldeir, ngangadh, nojha, pdhange, pdhiran, racpatel, rpollack, rzarzyns, sseshasa, tpetr, tserlin, vumrao |
| Target Milestone: | --- | Flags: | sseshasa:
needinfo-
pdhange: needinfo- |
| Target Release: | 6.1z9 | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | ceph-17.2.6-264.el9cp | Doc Type: | Bug Fix |
| Doc Text: |
.New shard and multiple worker threads configuration now yields significant results in terms of consistency of client
Previously, scheduling with mClock was not optimal with multiple OSD shards on a HDD based Ceph cluster. Hence, the client throughput was found to be inconsistent across test runs coupled with multiple reported slow requests during recovery and backfill operations.
With this fix, HDD OSD shard configuration is updated as follows:
- osd_op_num_shards_hdd = 1 (was 5)
- osd_op_num_threads_per_shard_hdd = 5 (was 1)
Now, the new shard and multiple worker threads configuration yields significant results in terms of consistency of client and recovery throughput across multiple test runs.
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Story Points: | --- |
| Clone Of: | 2294594 | Environment: | |
| Last Closed: | 2025-04-28 05:29:53 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: | 2294594 | ||
| Bug Blocks: | 2299480 | ||
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Description
Vikhyat Umrao
2024-07-23 14:57:38 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 (Important: Red Hat Ceph Storage 6.1 bug fix 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-2025:4238 |