Re: Handling large volumes of data

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On Dienstag, 8. April 2008 Johann Spies wrote:
> I have got 8x720G disks in a hardware raid 5 setup. It is a Dell 2950
> server. I am using an XFS-filesystem. =A0I am not certain about the
> speed of the hard disk, but we bought the fastest we could get.

720G looks like SATA disks, probably with "only" 7.200rpm. The Western=20
Digital Raptor with 10.000rpm are about twice as fast on random access.=20
Also, RAID5/6 are very,very slow when it comes to small disk *writes*.=20
Which is exactly what a db makes. Retry with RAID-10, and you'll see=20
the difference.

We've had 6 WD Raptors in RAID-6 on an Areca RAID, and changed it to 8x=20
Raptor RAID-10, that improved things.

mfg zmi
=2D-=20
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