From: "Russ Cox" <rsc@plan9.bell-labs.com>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] compare-by-hash
Date: Sat, 31 May 2003 19:54:05 -0400 [thread overview]
Message-ID: <42a1ec9c5fef102e9c9ec920db53bccf@plan9.bell-labs.com> (raw)
In-Reply-To: <20030531234803.1028.qmail@infidel.telus.net>
The paper seems correct on most things, but is unfair to Venti.
Venti is closer to hashing than compare-by-hash.
Venti does look for SHA1 hash collisions -- once a block with a
particular SHA1 hash has been written, you can't write any
others. Therefore you can't possibly end up thinking there are
two different blocks stored on the same server and represented
by the same SHA1 hash -- the store of the second will fail!
Russ
next prev parent reply other threads:[~2003-05-31 23:54 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-31 23:48 Taj Khattra
2003-05-31 23:48 ` Charles Forsyth
2003-05-31 23:50 ` Charles Forsyth
2003-05-31 23:54 ` Russ Cox [this message]
2003-05-31 23:58 philw
2003-06-01 0:00 ` Russ Cox
2003-06-01 1:15 ` northern snowfall
2003-06-01 0:23 ` Russ Cox
2003-06-01 1:23 ` northern snowfall
2003-06-01 0:24 ` Dan Cross
2003-05-31 23:49 ` Skip Tavakkolian
2003-06-01 5:52 ` Dan Cross
2003-06-01 8:57 ` Charles Forsyth
2003-06-01 9:06 ` lucio
2003-06-01 9:25 ` lucio
2003-06-01 15:36 ` David Presotto
2003-06-01 16:24 ` David Presotto
2003-06-02 4:14 ` lucio
2003-06-02 4:03 ` lucio
2003-06-01 22:55 ` Geoff Collyer
2003-06-01 0:28 ` William Josephson
2003-06-01 1:46 ` northern snowfall
2003-06-01 1:38 ` William K. Josephson
2003-06-01 1:57 ` Scott Schwartz
2003-06-01 2:58 ` northern snowfall
2003-06-01 2:57 ` W. Josephson
2003-06-01 4:07 ` northern snowfall
2003-06-01 15:11 ` boyd, rounin
2003-06-02 11:37 ` Sam
2003-06-02 12:41 ` boyd, rounin
2003-07-31 17:24 Joel Salomon
2003-07-31 17:50 ` andrey mirtchovski
2003-07-31 17:51 ` Sape Mullender
2003-07-31 17:53 ` rog
2003-07-31 18:03 ` jmk
2003-08-01 2:45 ` Joel Salomon
2003-08-01 2:52 ` Geoff Collyer
2003-08-01 3:42 ` jmk
2003-08-01 4:12 ` Geoff Collyer
2003-08-01 15:23 ` Jack Johnson
2003-08-01 9:03 ` Anthony Mandic
2003-08-01 15:11 ` Jack Johnson
2003-08-01 9:02 ` Douglas A. Gwyn
2003-08-03 4:39 Andrew Simmons
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