From: "Benoît Canet" <benoit.canet@irqsave.net>
To: Stefan Hajnoczi <stefanha@gmail.com>
Cc: kwolf@redhat.com, "Benoît Canet" <benoit.canet@gmail.com>,
stefanha@linux.vnet.ibm.com, qemu-devel@nongnu.org,
blauwirbel@gmail.com, anthony@codemonkey.ws, pbonzini@redhat.com,
eblake@redhat.com, afaerber@suse.de
Subject: Re: [Qemu-devel] [PATCH 00/10] Quorum disk image corruption resiliency
Date: Fri, 10 Aug 2012 19:45:51 +0200 [thread overview]
Message-ID: <20120810174550.GA2033@irqsave.net> (raw)
In-Reply-To: <CAJSP0QXYRO+4aUs1YOpVpLjU-ziQQNMwoQqFgTWONSEQYNCoWg@mail.gmail.com>
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.canet@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
>
prev parent reply other threads:[~2012-08-10 17:46 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-07 13:44 [Qemu-devel] [PATCH 00/10] Quorum disk image corruption resiliency Benoît Canet
2012-08-07 13:44 ` [Qemu-devel] [RFC V2 01/10] quorum: Create quorum.c, add QuorumSingleAIOCB and QuorumAIOCB Benoît Canet
2012-08-07 20:24 ` Blue Swirl
2012-08-07 13:44 ` [Qemu-devel] [RFC V2 02/10] quorum: Create BDRVQuorumState and BlkDriver and do init Benoît Canet
2012-08-07 13:44 ` [Qemu-devel] [RFC V2 03/10] quorum: Add quorum_open() Benoît Canet
2012-08-07 20:30 ` Blue Swirl
2012-08-07 20:40 ` Eric Blake
2012-08-10 17:48 ` Benoît Canet
2012-08-13 7:41 ` Kevin Wolf
2012-08-14 16:56 ` Benoît Canet
2012-08-15 10:40 ` Kevin Wolf
2012-08-08 15:04 ` Stefan Hajnoczi
2012-08-07 13:44 ` [Qemu-devel] [RFC V2 04/10] quorum: Add quorum_close() Benoît Canet
2012-08-07 20:30 ` Blue Swirl
2012-08-08 15:06 ` Stefan Hajnoczi
2012-08-07 13:44 ` [Qemu-devel] [RFC V2 05/10] quorum: Add quorum_getlength() Benoît Canet
2012-08-08 15:30 ` Stefan Hajnoczi
2012-08-09 9:07 ` Benoît Canet
2012-08-09 9:14 ` Stefan Hajnoczi
2012-08-07 13:44 ` [Qemu-devel] [RFC V2 06/10] quorum: Add quorum_aio_writev and its dependencies Benoît Canet
2012-08-08 15:37 ` Stefan Hajnoczi
2012-08-09 9:24 ` Benoît Canet
2012-08-09 9:35 ` Stefan Hajnoczi
2012-08-07 13:44 ` [Qemu-devel] [RFC V2 07/10] blkverify: Make blkverify_iovec_clone() and blkverify_iovec_compare() public Benoît Canet
2012-08-08 15:38 ` Stefan Hajnoczi
2012-08-07 13:44 ` [Qemu-devel] [RFC V2 08/10] quorum: Add quorum_co_flush() Benoît Canet
2012-08-07 13:44 ` [Qemu-devel] [RFC V2 09/10] quorum: Add quorum_aio_readv Benoît Canet
2012-08-08 15:44 ` Stefan Hajnoczi
2012-08-08 15:46 ` Stefan Hajnoczi
2012-08-07 13:44 ` [Qemu-devel] [RFC V2 10/10] quorum: Add quorum mechanism Benoît Canet
2012-08-08 15:54 ` Stefan Hajnoczi
2012-08-08 14:55 ` [Qemu-devel] [PATCH 00/10] Quorum disk image corruption resiliency Stefan Hajnoczi
2012-08-10 17:45 ` Benoît Canet [this message]
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