Re: Domain saving and filesystem corruption

[Anthony Liguori <aliguori@us.ibm.com>]

Keir Fraser wrote:
>
> On 25 Jun 2006, at 01:32, Tracy R Reed wrote:
>
>> I mentioned this to someone on the IRC channel and they said "That is
>> documented behavior." Unfortunately that doesn't bring back my data. It
>> wasn't documented when I started using Xen and I can't possibly keep up
>> on everything written about Xen in the meantime.
>
> I'm not sure if the behaviour is documented, but it certainly isn't 
> new. Save/restore has always behaved like that -- a filesystem should 
> be considered 'locked down' by a guest except when the guest OS is 
> shut down cleanly. No interlock is enforced or metadata maintained for 
> this in open source tools.

You really ought to avoid save/restore/migrate when not using network or 
checkpointable storage.  You will almost certainly eventually get some 
sort of corruption.

I didn't realize xend actually tries to save domains on shutdown.  Seems 
like a bad idea to me.  Is this correct?  Is this only for domains 
started with /etc/init.d/xendomains?

Regards,

Anthony Liguori

>  -- Keir
>
>
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