From: jassduec@gmail.com
To: linux-admin@vger.kernel.org, linux-config@vger.kernel.org,
linux-scsi@vger.kernel.org
Subject: RAID 5 throughputs
Date: Sat, 19 Aug 2006 11:46:08 -0600 [thread overview]
Message-ID: <3a1eedb70608191046o7dd207bfp15f02e90b297b1a9@mail.gmail.com> (raw)
Hi All,
I have a storage system with 12 Maxtor 7200 rpm 250GB hard drives in
RAID 5 configuration with one hot spare. Maxtor claims that each drive
is capable of providing 56 MB/s sustained throughput. My host system
is connected to it using 64bit ultra320 Adaptec SCSI card. The host
system has 3.0 GHz pentium 4 (with HT) processor and 4 GB of RAM
running linux kernel 2.6.9. I was wondering what order of "maximum"
sequential read/write, random read/write throughput should i expect
using them. I am using some of the benchmarking tools like Bonnie,
Bonnie++, tiobench, dd, iometer etc. However the results from them
have been very depressing. Theoretically i should be able to achieve a
read sequential throughput close to min(10*56 = 560, 320) = 320 MB/s.
However my results are no way close to it. I was wondering if anybody
can give me some insight of what order of practical throughputs i
should expect using linux and what other factors may be creating
bottlenecks.
TIA
next reply other threads:[~2006-08-19 17:46 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-19 17:46 jassduec [this message]
2006-08-19 18:00 ` RAID 5 throughputs Justin Piszcz
2006-08-20 2:58 ` jassduec
2006-08-20 8:37 ` Justin Piszcz
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