Re: [libvirt] [PATCH] set cache=off on -disk line in qemu driver if <shareable/> (but not <readonly/>) is set.

On Sat, Nov 01, 2008 at 06:20:27PM -0500, Charles Duffy wrote:

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As cache=off is necessary for clustering filesystems such as GFS (and such is the point of shareable, yes?), I believe this is correct behavior.

Comments?

Yes that sounds right, if shared over network we should not cache locally in the OS,

applied and commited,

thanks !

Daniel cache=off should be the default case (or the similar O_DSYNC case). cache=on should only be used for temporal usage and not really

Daniel Veillard wrote: production data. It's just unsafe to use caching if you data is important to you. It's a hot issue in the qemu mailing list. Cheers, Dor