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Re: [Qemu-devel] [RFC V3 01/24] qcow2: Add deduplication to the qcow2 sp
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From: |
Stefan Hajnoczi |
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Subject: |
Re: [Qemu-devel] [RFC V3 01/24] qcow2: Add deduplication to the qcow2 specification. |
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Date: |
Tue, 11 Dec 2012 12:32:34 +0100 |
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User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Mon, Nov 26, 2012 at 02:05:00PM +0100, Benoît Canet wrote:
> +== Deduplication table ==
> +
> +The deduplication table contains 64 bits offsets to the level 2 deduplication
> +table clusters.
> +Each entry of these clusters contains a 32 bytes SHA256 hash followed by the
> +64 bits logical offset of the first encountered block having this hash.
Can you foresee the need to use a different hash algorithm in the future
and should we add a hash_algo enum field to the dedup QCOW2 header
extension?
Stefan