XFS and XEN

[Michael Monnerie]

On Mittwoch 25 Februar 2009 Michael Monnerie wrote:
> Q: Which settings are best with virtualization like VMware, XEN,
> qemu?
>
> The biggest problem is that those products seem to also virtualize
> disk writes in a way that even barriers don't work anymore, which
> means even a fsync is not reliable. Tests confirm that unplugging the
> power from such a system even with RAID controller with battery
> backed cache and hard disk cache turned off (which is save on a
> normal host) you can destroy a database within the virtual machine
> (client, domU whatever you call it).
>
> In qemu you can specify cache=off on the line specifying the virtual
> disk. For others I have no information what to do.

In as question 26 now
http://xfs.org/index.php/XFS_FAQ

mfg zmi
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