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Feature #2685

Support QEMU migration with caching enabled

Added by Greg Farnum over 7 years ago. Updated over 7 years ago.

Status:
Rejected
Priority:
Normal
Assignee:
-
Target version:
% Done:

0%

Source:
Tags:
Backport:
Reviewed:
Affected Versions:
Pull request ID:

Description

See http://permalink.gmane.org/gmane.comp.file-systems.ceph.devel/7524

Apparently newer versions of QEMU refuse to live migrate if you're using caching, unless you force it with the unsafe command-line flag. We need to:
1) look into whether that really is unsafe for us (ie, does it do a cache flush or a sync).
2) Find out if we can make it work without making the user provide the unsafe option.

History

#1 Updated by Josh Durgin over 7 years ago

  • Status changed from New to Rejected

This is a libvirt problem, it's not related to qemu at all. I already looked into and tested whether qemu was doing flushes correctly (see #2467).

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