Bug 1262985
| Summary: | Backport mon: add a cache layer over MonitorDBStore #5524 | ||
|---|---|---|---|
| Product: | [Red Hat Storage] Red Hat Ceph Storage | Reporter: | Neil Levine <nlevine> |
| Component: | RADOS | Assignee: | Ken Dreyer (Red Hat) <kdreyer> |
| Status: | CLOSED ERRATA | QA Contact: | ceph-qe-bugs <ceph-qe-bugs> |
| Severity: | high | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 1.2.3 | CC: | ceph-eng-bugs, ceph-qe-bugs, dzafman, flucifre, hnallurv, kchai, kdreyer, ksquizza, nlevine, vakulkar |
| Target Milestone: | rc | ||
| Target Release: | 1.3.0 | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | ceph-0.94.1-19.el7cp (RHEL) ceph v0.94.1.8 (Ubuntu) | Doc Type: | Bug Fix |
| Doc Text: |
Prior to this update, poor LevelDB performance in Ceph's monitors could cause spurious elections. This could lead to slow requests during re-balancing. With this update, Ceph now caches the osdmap to be sent to the monitor clients, and cluster performance is improved.
|
Story Points: | --- |
| Clone Of: | 1262460 | Environment: | |
| Last Closed: | 2015-10-08 18:59:49 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: | |||
|
Comment 2
Ken Dreyer (Red Hat)
2015-09-17 20:25:10 UTC
Good spot. Are you suggesting we apply this as an async on 1.3? Right, we'll put it into the 1.3.0 Ubuntu GA release, and then fix it as a 1.3.0 RHEL ASYNC update. Harish wrote the following in email today: > The plan to verify this bug is as follows: > > 1) On a build that is not having this fix, run the monstore-tool with leveldb > cache size set as 10 with IOs running from clients. > Expected: IO failures > > 2) On a build that is Having this fix, run the monstore-tool with leveldb > cache size set as 10 with IOs running from clients. > Expected: NO IO failures > > We need ceph-monstore-tool to run in both the cases above. Kefu, what exact versions of ceph-monstore-tool does QE need? In case #1 above, do we need to use ceph-test from v0.80.7? Or am I confusing things? for the usage of ceph-monstore-tool, see https://bugzilla.redhat.com/show_bug.cgi?id=1263608 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, 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-2015:1882 |