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https://issues.apache.org/jira/browse/VCL-1084?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16850015#comment-16850015
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ASF subversion and git services commented on VCL-1084:
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Commit 9912242b77e3128bdc66af3a7763533c4d29d6ae in vcl's branch
refs/heads/develop from Josh Thompson
[ https://gitbox.apache.org/repos/asf?p=vcl.git;h=9912242 ]
VCL-1084 - set cache mode for libvirt VMs
libvirt.pm: modified generate_domain_xml: added check for vmpath being on local
disk and if so, set flag to set disk cache to none; after creation of
$xml_hashref, if flag set for disk cache, add disk cache none to xml_hashref
> set cache mode for libvirt VMs
> ------------------------------
>
> Key: VCL-1084
> URL: https://issues.apache.org/jira/browse/VCL-1084
> Project: VCL
> Issue Type: Improvement
> Components: vcld (backend)
> Reporter: Josh Thompson
> Priority: Major
> Fix For: 2.5.1
>
>
> The recommend cache mode for VMs depends on the storage type being used. If
> the qcow2 file is on an NFS mount, the cache mode should be none. If it is on
> a local filesystem, it should be writethrough or writeback. Additionally,
> when trying to perform a live migration with a shared NFS mount, it fails if
> the cache mode is not none because data corruption could result.
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