Re: [Qemu-devel] [PATCH V19 00/12] Quorum block filter

[Eric Blake <eblake@redhat.com>]

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On 02/21/2014 02:21 PM, Benoît Canet wrote:
> Hi this is the latest version of the quorum block filter.
> 
> This version fix the qmp events and a small rebase conflict.
> 
> tested:
> 
> tested that json qmp string are correct and parse well with python
> 
> Ran qemu-iotest including 081 ok
> 
> quorum command line ok
> quorum command line snapshot transaction ok
> quorum QMP by reference ok
> quorum QMP by reference and snapshot transaction ok
> quorum QMP at once ok
> quorum QMP at once and snapshot transaction ok

Generic question:

When the quorum detects mismatch but there was still a majority, is
there a way to request that the quorum correct the odd man out?  That
is, if I have a 2/3 quorum, and files A and B read '1' while C reads
'2', can the mere act of reading that sector be used to write '1' into C?

Obviously, this should be an optional mode, not enabled by default; but
I could envision creating a self-healing redundant array via this method.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org


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