[Sheepdog] Power supply interruption crashes data stored in sheepdog

MORITA Kazutaka morita.kazutaka at lab.ntt.co.jp
Fri Aug 5 01:12:32 CEST 2011

At Thu, 4 Aug 2011 16:28:50 -0300,
Rubens Matos wrote:
> Hi everyone,
> I am testing sheepdog and everything was working, but after an interruption
> in power supply, that affected all nodes, the cluster was damaged so that
> the nodes didn't join again, and I can't recover the data that was stored in
> a VDI.
> Have you already noticed a similar behavior? Is sheepdog protected against
> such kind of failure, in which all nodes are abruptly disconnected?

Sheepdog should handle the total node failure, but I think some bugs
still exist in it.  The error handling has not been tested enough.

If you have not cleaned the damaged cluster yet, can you give me the
outputs of "collie cluster info" on all the nodes?  Those info would
be helpful to find the error reason.

I'm implementing a "collie cluster check" command, which works like
fsck for Sheepdog.  This command would be helpful for recovering the
damaged cluster.



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