Bug 1878559
| Summary: | [Intel RHCS Feat] Ceph: Replicated Write-back Cache support Optane PMem in librbd | ||
|---|---|---|---|
| Product: | [Red Hat Storage] Red Hat Ceph Storage | Reporter: | AA <anantha.adiga> |
| Component: | RBD | Assignee: | Ilya Dryomov <idryomov> |
| Status: | CLOSED ERRATA | QA Contact: | Harish Munjulur <hmunjulu> |
| Severity: | high | Docs Contact: | Ranjini M N <rmandyam> |
| Priority: | unspecified | ||
| Version: | 5.0 | CC: | bniver, brault, ceph-eng-bugs, hmunjulu, idryomov, kdreyer, madam, ocs-bugs, pragyansri.pathi, rmandyam, smerrow, sostapov, tserlin, vereddy |
| Target Milestone: | --- | Keywords: | FutureFeature |
| Target Release: | 5.0 | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | ceph-16.0.0-8633.el8cp | Doc Type: | Technology Preview |
| Doc Text: |
.librbd PMEM-based persistent write-back cache to reduce latency
With this release, the new `pwl_cache` librbd plugin provides a log-structured write-back cache targeted at PMEM devices thereby reducing the latency. The updates to the image are batched and flushed in-order, retaining the actual image in a crash-consistent state.
If the PMEM device is lost, the image is still accessible though it may appear outdated.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2021-08-30 08:26:43 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: | 1951982 | ||
| Bug Blocks: | 1878238, 1959686 | ||
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Comment 16
errata-xmlrpc
2021-08-30 08:26:43 UTC
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