[aclug-L] Re: MTAs & maildir vs mbox (was Re: Virtual POP3 and IMAP server)

["Ryan Hunt" <rhunt@xxxxxxxxxxx>]

Mailservers harddrives must be verry durrable,
I would put some SCSI harddrives in there, they dont have to be realy fast
but they handle large loads of reading/writing much better than IDE, I would
also go with a Journaling File system for faster performance and much faster
boot times, I use ReiserFS but QMail needs to be patched
 http://www.reiserfs.com/faq.html#qmail ) to prevent file corruption..

-Ryan

----- Original Message -----
From: "Dale W Hodge" <dwh@xxxxxxxxxxxxxxxx>
To: <discussion@xxxxxxxxx>
Sent: Friday, October 19, 2001 1:43 PM
Subject: [aclug-L] Re: MTAs & maildir vs mbox (was Re: Virtual POP3 and IMAP
server)


>
> > -----Original Message-----
> > From: discussion-bounce@xxxxxxxxx [mailto:discussion-bounce@xxxxxxxxx]On
> > Behalf Of Jonathan Hall
> > Sent: Friday, October 19, 2001 1:29 PM
> > To: discussion@xxxxxxxxx
> > Subject: [aclug-L] Re: MTAs & maildir vs mbox (was Re: Virtual POP3 and
> > IMAP server)
> >
> >
> >
> > I know sometimes what seems like common sense doesn't necissarily pan
out in
> > the real world...
> >
> > But isn't it faster to read (and then delete) a single large file rather
> > than reading then deleting a number of small files?
> >
> > I put together a quick 'n dirty bash script to test this theory... altho
I
> > realize this isn't the same as a real-world MTA/POP3 style test...  here
are
> > my results:
> >
> > (Test platform, if it matters to anyone, is Debian/Linux on a P133 w/
64mb
> > RAM and 6gb IDE HD)
> > Real User Sys
> > Creating 1000 10kb files (with dd): 14.725 7.330 7.200
> > Deleting 1000 10kb files: 10.733 5.230 5.410
> > Creating 1 10,000kb file (with dd): 0.893 0.080 0.740
> > Deleting 1 10,000kb file: 0.102 0.050 0.050
> > Creating 10,000kb file, 10kb at a time: 12.567 6.600 5.830
> > Deleting 10,000kb file, 10kb at a time: After 14m51s I aborted this test
> >
> > The last test (deleting a partial file) is obviously where mbox suffers
the
> > greatest performance hit.
>
> Actually, I don't think the mbox truely does an partial delete. I think it
> merely copies the messages to a new file, skipping those parts marked for
> deletion and then deletes the old file.  I can regularly purge a couple
hundred
> messages out of 1000 in less than 10 seconds.
>
>
> --dwh
>
> ---
> Dale W Hodge - dwh@xxxxxxxxxxxxxxxx
> Secretary & Website Maintainer - info@xxxxxxxxx
> Air Capital Linux User's Group  (ACLUG)
> ---
>
>
> -- This is the discussion@xxxxxxxxx list.  To unsubscribe,
> visit http://tmp2.complete.org/cgi-bin/listargate-aclug.cgi
>

-- This is the discussion@xxxxxxxxx list.  To unsubscribe,
visit http://tmp2.complete.org/cgi-bin/listargate-aclug.cgi