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Re: [Monotone-devel] Re: zlib vs gzip

From: Markus Schiltknecht
Subject: Re: [Monotone-devel] Re: zlib vs gzip
Date: Tue, 30 Oct 2007 09:08:48 +0100
User-agent: Mozilla-Thunderbird (X11/20071008)


Jack Lloyd wrote:
Or: no compression, for people who have plenty of cheap disk and would
prefer Monotone not bother compressing anything going to a local DB
since it just slows things down, and are perfectly willing to trade a
penny or two of platter space for even slightly faster interactive
response from a tool they use a lot. (Raises hand)

If this would really affect disk space only, I'd agree. But monotone has to load the data very often. Thus it either needs disk throughput or it eats memory (when already cached).

Especially disk throughput is growing very slow compared to CPU-power (i.e. compression-throughput). From that point of view I don't necessarily think that compression slows down anything, rather quite the opposite (given a desktop system with a single spindle, not a server with a beefy disk subsystem).

And then there's netsync, which certainly needs compression. So we need to compress anyway at some point in time.



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