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https://issues.apache.org/jira/browse/CLOUDSTACK-3776?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13718169#comment-13718169
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ASF subversion and git services commented on CLOUDSTACK-3776:
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Commit e6bad5c831b39171370bdb19180dbb1613a4b790 in branch refs/heads/master
from [~widodh]
[ https://git-wip-us.apache.org/repos/asf?p=cloudstack.git;h=e6bad5c ]
CLOUDSTACK-3776: Mount SSVM root filesystem with sync and noatime
> System VMs should mount their filesystem with noatime and sync
> --------------------------------------------------------------
>
> Key: CLOUDSTACK-3776
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-3776
> Project: CloudStack
> Issue Type: Improvement
> Security Level: Public(Anyone can view this level - this is the
> default.)
> Components: SystemVM
> Affects Versions: 4.1.0
> Reporter: Wido den Hollander
> Assignee: Wido den Hollander
> Fix For: 4.2.0
>
>
> Currently the System VMs mount their filesystem with the default mount
> options, which is rw,async.
> To improve their stability I recommend that we mount their root filesystem
> with: rw,sync,noatime
> This will bring their I/O performance down by a bit, but that doesn't matter
> that much. It will however make the FS more robust after a hypervisor crash.
> Noatime is just to prevent writes on reads and will improve performance by a
> fraction.
> I have seen a lot of ext3 filesystems go corrupt inside SSVMs under KVM and
> rebuilding them can take some time.
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