Re: [Iscsitarget-devel] .30 r/w performance

[Ming Z. <mi...@el...>]

On Wed, 2004-08-25 at 08:50, Ming Zhang wrote:
> On Wed, 2004-08-25 at 04:03, Libor Vanek wrote:
> > > Hi, I tested .30 r/w performance today.
> > > 
> > > Initiator:
> > > 2 dell pc with P4 2.6G 1GRAM, Intel Pro1000T. but due to the 32 bit PCI
> > > slot, it can only achieve 500Mb/s. 1 run windows xp sp1, 1 run windows
> > > 2003. windows 2000 get very similar results with windows 2003. usually
> > > no difference or 1mb/s slower.
> > > 
> > > Target:
> > > Dell poweredge 2600, dual 2.4ghz, 1G ram. 1 intel pro1000t nic.
> > > 1 15k rpm scsi disk. and 1 hardware sata raid.
> > > 
> > 
> > Good job! One small comment about setup - my experiences with SATA RAIDs (and I've built 10s of them!) are that if you use 3Ware card (there is no other one with good Linux drivers and >= 8 SATA ports) it's faster (20-50%!!!) to use SW RAID 5 instead of HW RAID 5. If you were using RAID1/RAID0 then it doesn't matter. And oh - you have to use reasonable number of disks (6 or more - the more the better). Can you provide some info about disk number, speed (rpm) and controller?
> this is an external sata raid we bought from somewhere i do not know. we
> connect it with system using a aic7xxx ultra 160 card. most disk i use
> are seagate 7200rpm 120GB or 160GB.
> 
> i have a 3ware 95xx card with raid0. similar disks. i will test some
> data now.
i use this 3ware card, hardware raid0, 6 disks. get 40MB/s write while
still 40MB/s read. but my 3ware raid should be much faster than this
number.

> 
> > 
> > Thanks,
> > Libor
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