On Fri, 2010-01-22 at 23:12 +0200, Timo Sirainen wrote: > I don't have any evidence, but my logic goes like: Mail is written to > disk once. Most users use a single client, which downloads the message > once. Or maybe they're using webmail, and they read the same message > approximately once (or maybe max. 1.1 times). In both cases read:write > is about 1:1.
Also if message is read close to after it was read, it's already in cache and won't have to be read from disk. In those cases read:write might be close to 0:1..
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