Bug 2134431
| Summary: | [RFE] librbd compare-and-write fixes and vector C API | ||
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| Product: | [Red Hat Storage] Red Hat Ceph Storage | Reporter: | Ilya Dryomov <idryomov> |
| Component: | RBD | Assignee: | Ilya Dryomov <idryomov> |
| Status: | CLOSED ERRATA | QA Contact: | Preethi <pnataraj> |
| Severity: | high | Docs Contact: | Eliska <ekristov> |
| Priority: | unspecified | ||
| Version: | 6.0 | CC: | ceph-eng-bugs, cephqe-warriors, ekristov, pasik, vereddy |
| Target Milestone: | --- | Keywords: | FutureFeature |
| Target Release: | 6.0 | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | ceph-17.2.3-53.el9cp | Doc Type: | Enhancement |
| Doc Text: |
.The librbd compare-and-write operation is improved and new `rbd_aio_compare_and_writev` API method is introduced
* *The semantics of compare-and-write C++ API now match those of C API.*
+
Previously, the compare-and-write C++ API, that is `Image::compare_and_write` and `Image::aio_compare_and_write` methods, would compare up to the size of the compare buffer. This would cause breakage after straddling a stripe unit boundary.
+
With this release, the compare-and-write C++ API matches the semantics of C API and both compare and write steps operate only on `len` bytes even if the respective buffers are larger.
* *The compare-and-write operation is no longer limited to 512-byte sectors.*
+
With this release, the compare-and-write can operate on stripe units, if the access is aligned properly. The stripe units are 4 MB by default.
* *New `rbd_aio_compare_and_writev` API method is now available.*
+
With this release, the `rbd_aio_compare_and_writev` API method is included to support scatter/gather on both compare and write buffers, which complements existing `rbd_aio_readv` and `rbd_aio_writev` methods.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2023-03-20 18:58:58 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 9
Preethi
2022-11-15 03:55:09 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 |