Re: Reliability recommendations

[Mark Kirkwood <markir@xxxxxxxxxxxxxxx>]

Dan Gorman wrote:
> All,
>
> Was that sequential reads? If so, yeah you'll get 110MB/s? How big  was 
> the datafile size? 8MB? Yeah, you'll get 110MB/s. 2GB? No, they  can't 
> sustain that. There are so many details missing from this test  that 
> it's hard to have any context around it :)

Actually they can. Datafile size was 8G, machine had 2G RAM (i.e. 
datafile 4 times memory). The test was for a sequential read with 8K 
blocks. I believe this is precisely the type of test that the previous 
posters were referring to - while clearly, its not a real-world measure, 
we are comparing like to like, and as such terrible results on such a 
simple test are indicative of something 'not right'.

regards

Mark

P.s. FWIW - I'm quoting a test from a few years ago - the (same) machine 
now has 4 RAID0 ata disks and does 175MB/s on the same test....