Bug 599091
| Summary: | libvirt: qemu: increase dd block size to speed up domain save | |||
|---|---|---|---|---|
| Product: | [Community] Virtualization Tools | Reporter: | Cole Robinson <crobinso> | |
| Component: | libvirt | Assignee: | Laine Stump <laine> | |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | ||
| Severity: | medium | Docs Contact: | ||
| Priority: | low | |||
| Version: | unspecified | CC: | berrange, crobinso, eblake, laine, xen-maint | |
| Target Milestone: | --- | |||
| Target Release: | --- | |||
| Hardware: | All | |||
| OS: | Linux | |||
| Whiteboard: | ||||
| Fixed In Version: | libvirt-0.8.2 | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | ||
| Clone Of: | ||||
| : | 601775 (view as bug list) | Environment: | ||
| Last Closed: | 2010-07-21 16:48:55 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: | ||||
| Bug Blocks: | 601775 | |||
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Description
Cole Robinson
2010-06-02 16:38:36 UTC
commit 20206a4bc9f1293c69eca79290a55a5fa19976d5 in libvirt git changes the dd blocksize to 1M. This decreased the time required for a save of a suspended 512MB guest from 3min47sec to 56sec. An additional patch avoids the overhead of seeking to a 1M alignment: https://www.redhat.com/archives/libvir-list/2010-June/msg00239.html This is included in 0.8.2. In addition upstream QEMU has identified & fixed a flaw that had significant speed impact |