Re: [Qemu-devel] [PATCH 00/10] Quorum disk image corruption resiliency

[Benoît Canet]

Le Wednesday 08 Aug 2012 à 15:55:58 (+0100), Stefan Hajnoczi a écrit :
> On Tue, Aug 7, 2012 at 2:44 PM, Benoît Canet <address@hidden> wrote:
> > This patchset create a block driver implementing a quorum using three qemu 
> > disk
> > images. Writes are mirrored on the three files.
> > For the reading part the three files are read at the same time and a vote is
> > done to determine which is the majority qiov version. It then return this
> > majority version to the upper layers.
> > When three differents versions of the data are returned by the lower layer 
> > the
> > quorum is broken and the read return -EIO.
> 
> If you make the quorum setting configurable, then this can replace
> blkverify.  n=2 is blkverify, n=3 is your current patch series, n/m is
> also possible where n=number of mirrors and m=threshold needed to
> achieve quorum.

I am working on making the quorum settings configurable.
I will post the new patchset next week.

Benoît

> 
> Stefan
>