On Mon, 2 Nov 2009, Terry Gliedt wrote:
> Brian A. Seklecki wrote:
>>
>> 1) The PERC6 performance is really poor. It's really slow to
>> write on any RAID level. In RAID5, it averages writes ~30-50
>> MBps where as Areca cards average 300-400 MBps
>
> This does not chive with our most recent performance test.
Indeed, it does not 'jibe' with ours, either (-:
> On an R900 with a PERC6E using RAID6 we measured write performance at
> 400MB/sec. All RAID values use the default for the card. Array is a Sun
> J4400.
When I read the intial post (interesting and useful as it was) it sounded
like the larger cache in the Areca was the only thing getting hit in the
tests while the PERC6 with its smaller cache was being asked to make
requests from the array itself.
I'd be interested in some benchmarks of larger, previously uncached data
transactions (sustained reads and writes for >4GB of data) from both cards,
in the same chassis, with the same OS setup.
Ben
--
Unix Support, MISD, University of Cambridge, England
Plugger of wire, typer of keyboard, imparter of Clue
Life Is Short. It's All Good.
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