Re: [Xen-devel] how to see the data changing in a running domain?

[Mark Williamson <Mark.Williamson@xxxxxxxxxxxx>]

> OK, so I suppose that there is a (fixed) policy that determines when
> to "flush" the "dirty" data from the cache to the virtual disk? If I
> dont like to use NFS or other special filesystems, can I expect that
> after certain "timeout", I will see the updated data in domainU from
> domain0?

Dom0 will see the data but it'll likely just get confused if you're using a 
conventional filesystem.  Ext, Reiser, etc, all assume that they have total 
control of what gets written to the disk.  The filesystem driver in dom0 will 
therefore get very confused if it sees stuff changing on the disk that it 
didn't write itself - it'll just look like the hard disk corrupting on its 
own.

A network filesystem or a cluster filesystem is really the only way to do this 
sanely.

HTH,
Mark


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