[CentOS] Software versus hardware RAID performance.
feizhou at graffiti.net
Fri Sep 22 03:00:51 UTC 2006
> Ok, the two 72GB drives are set up RAID1, and the four 146GB drives are set up
> striped, RAID0. The two 72's are on channel 1, and the four 146's are on
> channel 2. Under CentOS 4 with the hardware RAID running, the four 146's
> (hardware RAID0) have a raw read performance of abut 150MB/s, which I thought
> was pretty good.
> Now, the box has dual 3GHz Xeons (it needs them for the pulsar dedispersion
> algorithm's FFT's, particularly when we refine it to do dedispersion in
> real-time). With FC5 installed, and the four 146's running software RAID0, I
> am getting nearly 240MB/s throughput (with other processes running). The box
> feels significantly more responsive; the GNUradio build with the PERC running
> in hardware RAID mode took about thirty minutes; with it running in LSI MPT
> SCSI mode it's taking half that time to build and install.
> Just thought I drop this data point in.
/me wonders whether that Dell RAID system was using Intel i960 cpus :P
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