From: "Benoît Canet" <benoit.canet@irqsave.net>
To: Stefan Hajnoczi <stefanha@redhat.com>
Cc: "Benoît Canet" <benoit.canet@irqsave.net>,
kwolf@redhat.com, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [RFC V8 01/24] qcow2: Add journal specification.
Date: Wed, 3 Jul 2013 14:53:27 +0200 [thread overview]
Message-ID: <20130703125327.GC5482@irqsave.net> (raw)
In-Reply-To: <20130703081235.GD16585@stefanha-thinkpad.muc.redhat.com>
> 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.
>
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/fs/jbd2
> http://www.sqlite.org/cgi/src/dir?name=src
> http://blitiri.com.ar/p/libjio/
I will try to find a paper on journal design.
Benoît
next prev parent reply other threads:[~2013-07-03 12:51 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-20 14:26 [Qemu-devel] [RFC V8 00/24] QCOW2 deduplication core functionality Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 01/24] qcow2: Add journal specification Benoît Canet
2013-07-02 14:42 ` Stefan Hajnoczi
2013-07-02 14:54 ` Kevin Wolf
2013-07-02 21:26 ` Benoît Canet
2013-07-03 8:08 ` Kevin Wolf
2013-07-03 7:51 ` Stefan Hajnoczi
2013-07-02 21:23 ` Benoît Canet
2013-07-03 8:01 ` Stefan Hajnoczi
2013-07-03 12:35 ` Benoît Canet
2013-07-03 8:04 ` Kevin Wolf
2013-07-03 12:30 ` Benoît Canet
2013-07-03 8:12 ` Stefan Hajnoczi
2013-07-03 12:53 ` Benoît Canet [this message]
2013-07-04 7:13 ` Stefan Hajnoczi
2013-07-04 10:01 ` Benoît Canet
2013-07-16 22:45 ` Benoît Canet
2013-07-17 8:20 ` Kevin Wolf
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 02/24] qcow2: Add deduplication structures and fields Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 03/24] qcow2: Add journal Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 04/24] qcow2: Create the log store Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 05/24] qcow2: Add the hash store Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 06/24] qcow2: Add the deduplication store Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 07/24] qcow2: Add qcow2_dedup_read_missing_and_concatenate Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 08/24] qcow2: Create a way to link to l2 tables when deduplicating Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 09/24] qcow2: Make qcow2_update_cluster_refcount public Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 10/24] qcow2: Add qcow2_dedup and related functions Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 11/24] qcow2: Add qcow2_dedup_store_new_hashes Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 12/24] qcow2: Do allocate on rewrite on the dedup case Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 13/24] qcow2: Implement qcow2_compute_cluster_hash Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 14/24] qcow2: Load and save deduplication table header extension Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 15/24] qcow2: Extract qcow2_set_incompat_feature and qcow2_clear_incompat_feature Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 16/24] block: Add qcow2_dedup format and image creation code Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 17/24] qcow2: Drop hash for a given cluster when dedup makes refcount > 2^16/2 Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 18/24] qcow2: Remove hash when cluster is deleted Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 19/24] qcow2: Integrate deduplication in qcow2_co_writev loop Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 20/24] qcow2: Serialize write requests when deduplication is activated Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 21/24] qcow2: Integrate SKEIN hash algorithm in deduplication Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 22/24] qcow2: Add qcow2_dedup_init and qcow2_dedup_close Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 23/24] qcow2: Enable the deduplication feature Benoît Canet
2013-06-20 14:26 ` [Qemu-devel] [RFC V8 24/24] qcow2: Enable deduplication tests Benoît Canet
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