Performance question...

[Michael J Barber]

Check out this PDF.  He explains the file system setups and modifications you 
can and should do(depending on your size).

http://www.web-cyradm.org/documentation/Postfix-cyrus-postgreSQL-web-
cyradm.pdf.gz

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Michael J Barber
SUNY Plattsburgh
CMS Computer Labs Technician
116D Feinberg Library
Plattsburgh, NY 12901
518.564.2319
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<


Quoting Cesar Lagarrigue <CLagarrigue at etek.cl>:

^^ How you did this ?
^^ 
^^ i have a cyrus for 450 users, but you say if not configure nothing in db, 
^^ you are your conf for make you did ?
^^ 
^^ You need:
^^ >   1. noatime
^^ how configure this ?
^^ 
^^ >   2. no "sync mounts" or "sync attributes" anywhere. Use a proper fs
^^ >    instead.
^^ i use ext3, how make this ?
^^ 
^^ >  3. A proper filesystem (ext2 and ext3 in default non-btree mode, 
^^ aren't.
^^ >     I doubt UFS is any better).
^^ any special configuration ? i did ext3.
^^ 
^^ >  4. A properly configured Berkeley DB environment (although for some
^^ >      reason, Cyrus seems to actually survive well without any config,
^^ >      maybe the CMU crew override the defaults with something sane in
^^ >      the bdb backend code. If you try the same with OpenLDAP, your 
^^ server
^^ >      will die an horrible death).
^^ 
^^ how configure this ? is a conf or compile something ? i have a default 
^^ cyrus with virtual users, and ldap with a backend 
^^ 
^^ #######################################################################
^^ # ldbm database definitions
^^ #######################################################################
^^ database        bdb
^^ 
^^ the produccion of server is the friday, please tell me a advise for best 
^^ performance for cyrus.
^^ 
^^ >   5. Use skiplist as the backend for the mailboxes and seen dbs.
^^ 
^^ how configure this ? is in the imapd.conf ?
^^ 
^^ p.d: :) thanks for any helps.
^^ 
^^ Regards,
^^ 
^^ Is you need send any conf please tell me.
^^ 
^^ 
^^ Cesar Lagarrigue V.
^^ Project Engineer
^^ clagarrigue at etek.cl
^^ 
^^ 
^^ 
^^ 
^^ Henrique de Moraes Holschuh <hmh at debian.org> 
^^ Sent by: owner-info-cyrus at lists.andrew.cmu.edu
^^ 25-02-2004 00:11
^^ 
^^ To
^^ Michael J Barber <mbarber at barbersweb.net>
^^ cc
^^ info-cyrus at lists.andrew.cmu.edu
^^ Subject
^^ Re: Performance question...
^^ 
^^ 
^^ 
^^ 
^^ 
^^ 
^^ On Tue, 24 Feb 2004, Michael J Barber wrote:
^^ > Cyrus after he thought it was too slow and could not configure it.  That
^^ 
^^ being
^^ 
^^ Hah, I bet he had Cyrus on a partition (or directories) operating in sync
^^ mode :)  (I assume he had a 2.x Cyrus install).
^^ 
^^ > Has anyone done similar things and noticed one server to be dramatically
^^ 
^^ faster
^^ > than the other?  He knows about noatime setting but I am not sure he did
^^ 
^^ it when
^^ > using the Cyrus server.  Has anyone ever seen any benchmarks for similar
^^ 
^^ setups?
^^ 
^^ You need:
^^   1. noatime
^^   2. no "sync mounts" or "sync attributes" anywhere. Use a proper fs
^^      instead.
^^   3. A proper filesystem (ext2 and ext3 in default non-btree mode, aren't.
^^      I doubt UFS is any better).
^^   4. A properly configured Berkeley DB environment (although for some
^^      reason, Cyrus seems to actually survive well without any config,
^^      maybe the CMU crew override the defaults with something sane in
^^      the bdb backend code. If you try the same with OpenLDAP, your server
^^      will die an horrible death).
^^   5. Use skiplist as the backend for the mailboxes and seen dbs.
^^ 
^^ -- 
^^   "One disk to rule them all, One disk to find them. One disk to bring
^^   them all and in the darkness grind them. In the Land of Redmond
^^   where the shadows lie." -- The Silicon Valley Tarot
^^   Henrique Holschuh
^^ ---
^^ Home Page: http://asg.web.cmu.edu/cyrus
^^ Wiki/FAQ: http://cyruswiki.andrew.cmu.edu
^^ List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
^^ 
^^ 
^^ 
^^ ---
^^ Home Page: http://asg.web.cmu.edu/cyrus
^^ Wiki/FAQ: http://cyruswiki.andrew.cmu.edu
^^ List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
^^ 

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