Quoting <Pine.LNX.4.21.0006160055550.5791-100000 at fogarty.jakma.org>
by Paul Jakma <paul at clubi.ie>:
> On Thu, 15 Jun 2000, David Murphy wrote:
>> > You can have something that's relatively (fast, safe, cheap), pick any
> > two. RAID5 is relatively safe and cheap. It's not relatively fast.
>> ok... here's a benchmark:
>> -------Sequential Output-------- ---Sequential Input-- --Random--
> -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
> Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
> 400 1798 87.1 5384 11.0 3188 15.9 1582 85.2 14076 25.0 181.2 4.1
>> this is on a 200MHz K6 machine, 128MB RAM, old DAC960-PDU controller
> (25MHz i960CF, 4MB RAM, 3x NCR 53c870 embedded uw scsi controller -
> ie one of of the early UW controllers). 64KB stripe, 8KB chunks,
How does that prove RAID5 is relatively fast, if you don't post RAID1
results on the same hardware?
When asked if it is true that he uses his wheelchair as a weapon he will reply:
"That's a malicious rumour. I'll run over anyone who repeats it."
Stephen Hawking - [http://www.smh.com.au/news/0001/07/features/features1.html]
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