Bug 1921927
| Summary: | Bluestore: user tunable KernelDevice buffer size | ||
|---|---|---|---|
| Product: | [Red Hat Storage] Red Hat Ceph Storage | Reporter: | Kyle Bader <kbader> |
| Component: | RADOS | Assignee: | Radoslaw Zarzynski <rzarzyns> |
| Status: | CLOSED ERRATA | QA Contact: | skanta |
| Severity: | high | Docs Contact: | Masauso Lungu <mlungu> |
| Priority: | unspecified | ||
| Version: | 4.1 | CC: | akupczyk, bhubbard, ceph-eng-bugs, ekristov, jdurgin, kdreyer, mbenjamin, mhackett, mlungu, nojha, rzarzyns, sseshasa, tserlin, vereddy, vumrao |
| Target Milestone: | --- | ||
| Target Release: | 6.0 | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | ceph-17.2.2-1.el9cp | Doc Type: | Enhancement |
| Doc Text: |
.User can now take advantage of a tunable KernelDevice buffer in BlueStore
With this release, users can now configure custom alignment for read buffers using `bdev_read_buffer_alignment` command in BlueStore.
This removes the limitations imposed by the default 4 KiB alignment space, when buffers are intended to be backed up by huge pages.
Additionally, BlueStore, through KernelDevice, gets a configurable pool with `bdev_read_preallocated_huge_buffer_num` parameter of MAP_HUGETLB-based read buffers for workloads with cache-unfriendly access patterns, which undergo recycling and are not cacheable.
Taken together, these features allow to shorten a scatter-gather list that is passed by the storage component to NICs, thereby improving the handling of huge page-based read buffers in BlueStore.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2023-03-20 18:55:33 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: | 2126050 | ||
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Comment 1
RHEL Program Management
2021-01-28 21:29:09 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 (Red Hat Ceph Storage 6.0 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/RHBA-2023:1360 |