From: erik quanstrom <quanstro@quanstro.net>
To: 9fans@9fans.net
Subject: [9fans] nupas imap4d
Date: Tue, 19 May 2009 09:52:51 -0400 [thread overview]
Message-ID: <3e8423c203b29c87d66749e716edb223@quanstro.net> (raw)
On Tue May 19 08:25:47 EDT 2009, kokamoto@hera.eonet.ne.jp wrote:
> What is the most important difference between the two?
> Would you please post it to 9fans?
i sent a more complete answer off list (which i've lost).
the main difference is that with nupas you don't have to
load the entire mailbox into ram if you use mdirs. at
coraid we have >3gb of mboxes opened multiple
times on a 2gb machine. the largest active mbox is
598mb. also using mdirs has reduced the size of the
dump due to mailboxes by 95%. i'm pretty sure there
would be very little block sharing in venti, due to
how messages move around wrt venti blocks, so the venti
savings would be similar.
the paper is http://www.quanstro.net/plan9/nupas.pdf.
- erik
next reply other threads:[~2009-05-19 13:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-19 13:52 erik quanstrom [this message]
-- strict thread matches above, loose matches on Subject: below --
2009-05-19 2:04 erik quanstrom
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