A little RAID experiment

[Stan Hoeppner]

On 4/25/2012 11:23 AM, Stefan Ring wrote:
>> Result (seems reasonably consistent):
>>
>> Operations performed:  0 Read, 127458 Write, 0 Other = 127458 Total
>> Read 0b  Written 995.77Mb  Total transferred 995.77Mb  (66.337Mb/sec)
>>  8491.11 Requests/sec executed]
> 
> Holy moly, this is an entirely different game you're playing here! I
> suppose that you're using a battery backed write cache?

He's running a 20 data spindle RAID60, across two decent hardware RAID
cards each with 512MB write cache, so of course it's going to be much
faster than your 4 data spindle RAID6, even with slightly slower spindles.

Note that 8x 15K drives in RAID10 on your P410i should slightly surpass
Roger's RAID60 performance, ~70MB/s vs 66MB/s.  3x fewer drives for
roughly equal performance, but obviously less capacity.

-- 
Stan