[sheepdog] [PATCH V2 4/4] collie: introduce '-o, --oid' option to 'collie vdi read' command

[MORITA Kazutaka]

At Fri, 24 Aug 2012 00:34:24 +0800,
Yunkai Zhang wrote:
> 
> On Thu, Aug 23, 2012 at 10:20 PM, MORITA Kazutaka
> <morita.kazutaka at lab.ntt.co.jp> wrote:
> > At Thu, 23 Aug 2012 21:46:55 +0800,
> > Yunkai Zhang wrote:
> >>
> >> When inconsistency happens, in the worst case, we just need to make
> >> replicas with the same value but needn't to care about which replica
> >> is correct.
> >>
> >> But in the best case, only several objects were polluted, then this
> >> patch can give us a chance to verify them, This patch is used to work
> >> with 'collie vdi check' command, that is my original intention when
> >> developed it.
> >
> > Well, replica inconsistency happens only when the VM terminates
> > unexpectedly.  If the vm image needs a fix, the guest os filesystem
> > should fix it.  What sheepdog should do is only keeping consistency so
> 
> Can you explain how the guest os files system fix it?

I meant fsck.

I don't fully understand yet what situation you want to avoid.  What
kinds of problem happens to you if you fix consistency with wrong
objects?

Thanks,

Kazutaka