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

[Jonathan Hall <jonhall@xxxxxxxxxxxx>]

What's your experience/knowledge/opinion of ext3 as opposed to reiserfs?


On Fri, Oct 19, 2001 at 01:53:28PM -0500, Ryan Hunt wrote:
> 
> 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
> >
> 
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--
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