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+Date: Mon, 24 Jul 2017 20:20:43 +0300
+From: Lars Wirzenius <liw@liw.fi>
+To: "Laurence Perkins (OE)" <lperkins@openeye.net>
+Message-ID: <20170724172043.s2ykrfwcusyzdcgd@liw.fi>
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+Subject: Re: Variable Chunksize
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+
+On Mon, Jul 24, 2017 at 05:12:15PM +0000, Laurence Perkins (OE) wrote:
+> Smaller chunk size makes deduplication more precise regardless of the
+> type of splitting, but it should generate some pretty big savings on
+> similar data without reducing the chunk size because it will be better
+> at finding identical chunks of data since it's not relying on them
+> being at fixed offsets.
+
+If you have actual measurements of this, please report them. Some
+years ago when this idea first came up in the Obnam context, using
+the proposed type of chunking without reducing chunk size
+significatnly didn't much help in de-duplication. Only when the
+average chunk size became much smaller, did de-deuplication get a lot
+better, but then the number of chunks became a problem.
+
+Guessing isn't helpful here. Even if it were, now is not a good time
+for me to spend any time on this, and I don't want to even consider a
+patch for this until green albatross is in shape.
+
+--=20
+I want to build worthwhile things that might last. --joeyh
+
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