[jira] [Resolved] (CLOUDSTACK-3776) System VMs should mount their filesystem with noatime and sync

["Wido den Hollander (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CLOUDSTACK-3776?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wido den Hollander resolved CLOUDSTACK-3776.
--------------------------------------------

    Resolution: Fixed

Fixed in both master and 4.2 branch

Root filesystem will now be mounted with both "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.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira