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 <benoit.ca...@gmail.com> 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 >
