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From: =?iso-8859-1?Q?Beno=EEt?= Canet <benoit.canet@irqsave.net>
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Subject: Re: [Qemu-devel] [RFC V8 01/24] qcow2: Add journal specification.
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To: Stefan Hajnoczi <stefanha@redhat.com>
Cc: =?iso-8859-1?Q?Beno=EEt?= Canet <benoit.canet@irqsave.net>, kwolf@redhat.com, qemu-devel@nongnu.org

> By the way, I don't know much about journalling techniques.  So I'm
> asking you these questions so that either you can answer them straight
> away or because they might warrant a look at existing journal
> implementations like:

I tried to so something simple and performing for the deduplication usage=
.

That explain that there is no concept of transaction and that the journal=
's
block are flushed asynchronously in order to have an high insertion rate.

I agree with your previous comment is more a log than a journal.

>=20
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/fs=
/jbd2
> http://www.sqlite.org/cgi/src/dir?name=3Dsrc
> http://blitiri.com.ar/p/libjio/

I will try to find a paper on journal design.

Beno=EEt