Re: "big" machines running Debian?
On Sat, Feb 28, 2009 at 09:39:07AM +0000, Ian McDonald wrote:
> Erm, not on anything other than a sequential read (and even then, I've
> never seen a single disk that would actually sustain that across it's
> whole capacity).
>
> Even raid-5s of significant numbers of disks aren't enormously fast,
> especially under multiple access. hdparm informs me that the SATA 28+2
> spare raid-5 I have will read 170M a second. That would rapidly diminish
> under any sort of load.
Probably a bus limitation rather than the disks. I have no problem
getting 100MB/s on a 4 disk raid5 with SATA.
> The only thing we've found that'll stand up to real multiuser load (like
> a mail spool) is raid-10, and enough spindles.
>
> We're beginning to see the requirement for 10GE on busy machines.
Sure. All depends on the load after all.
--
Len Sorensen
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