Date: Thu, 23 Dec 2004 11:41:06 -0800 From: darren david <darren@3x3x3.org> To: Mike Tancsa <mike@sentex.net> Cc: freebsd-stable@freebsd.org Subject: Re: Poor performance with 3Ware 7506LP RAID Message-ID: <41CB1F52.2010800@3x3x3.org> In-Reply-To: <6.2.0.14.0.20041223101407.1053a0e8@64.7.153.2> References: <41CAB1A9.9040903@speechpro.com> <6.2.0.14.0.20041223101407.1053a0e8@64.7.153.2>
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>> Hello, >> we have performance problem with 3Ware 7506LP RAID5. For example if we >> execute rsync for large array of data, then >> 'systat -vmstat' shows 100% load on twed0, and many other processes >> wait disk I/O. >> >> Also, which SATA RAID controller would you recomend for >> Samba/Courier-IMAP server for company with 80 users? > > > I think the 7xxx series is not so great for RAID5 speed wise. I know on > our 7810, its lucky to get 15MB/s on block writes on 6 160G > ST3160021A... I havent tested the 8xxx series in RAID5, but supposedly > they are faster as is the 9000. But I dont know about the stability of > the 9xxx series drivers (twe vs twa). If speed and reliability is what > you want, look at RAID10. Our one mail server on RAID10 sees about > 15-40 concurrent connections a second at peak times. With a lot of RAM > and Maildir format, there is hardly any blocking going on. I'm running a 9500 on 5.3-STABLE with 4x250 RAID 5, performance is solid and it's totally stable. Can't say the same for the 3dm2 software, tho. Still no luck getting that up and running. darren
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