Date: Thu, 11 Jun 1998 14:09:19 +0200 From: "IBS / Andre Oppermann" <andre@pipeline.ch> To: "Andras Tudos - Computronic, C3" <andras.tudos@computronic.hu> Cc: isp@FreeBSD.ORG, marci@c3.hu Subject: Re: file system performance Message-ID: <357FC8EF.C5B5CD8F@pipeline.ch> References: <3.0.5.32.19980611000210.00a868b0@computronic.hu> <3.0.5.32.19980611124654.00aad210@computronic.hu> <3.0.5.32.19980611135125.00a36240@computronic.hu>
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Andras Tudos - Computronic, C3 wrote: > > At 13:17 98.06.11 +0200, you wrote: > > > >What type of RAID do you have (I assume RAID 5)? > >Is the CMD5440 an external RAID controller or internal? > > > RAID5. External. (Backend PC has an Adaptec UW SCSI controller connected to > the CMD RAID controller with 16Mb of cache, it has 3 UW channels each with > 2x 9Gb IBM UW 7200 drives.) Check out if the CMD controller does write-through (for security reasons, power failure). RAID5 is in general slower on writes than reads. -snip- > >What sits in the queue? Incoming mail? > > > Yes. The local deliveries cannot keep up with the smtp-accept rate at peak > periods. There are lists with hundreds of subscribers from our system and > they generate a huge amount of mail traffic. The problems occur on the > current single server system, but we want the new system to have at least > ten times more performance than the current overloaded server to have > spares for the continuosly increasing traffic (and we would like to develop > other projects instead of having to upgrade our system each month :). Yea ;-) -- Andre Oppermann CEO / Geschaeftsfuehrer Internet Business Solutions Ltd. (AG) Hardstrasse 235, 8005 Zurich, Switzerland Fon +41 1 277 75 75 / Fax +41 1 277 75 77 http://www.pipeline.ch ibs@pipeline.ch To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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