Re: asm on san
Date: Mon, 15 Dec 2008 21:45:27 GMT
Message-ID: <XdA1l.1806$c35.827@nwrddc02.gnilink.net>
"Robert Klemme" <shortcutter_at_googlemail.com> wrote in message
news:6qo0nrFdqgb7U2_at_mid.individual.net...
> On 14.12.2008 21:47, gym dot scuba dot kennedy at gmail wrote:
>
>> THe whole thing is a chain and one must understand the chain to identify
>> bottlenecks. For example, you could have data stripped across 1,000
>> disks and only have 1 CPU on the san, Your limitation is the CPU in that
>> example.
>
> Not necessarily: you can cripple performance even more by bad application
> design. :-)
>
> Cheers
>
> robert
Robert,
We are in agreement. Poor application design is a major cause of in the
toilet performance. Absolutely. The point I meant to make was that just
having a lot of disks stripped allows the disks to serve up a ton of
bandwidth, but if you don't have sufficient CPU or IO channels etc. then it
is meaningless.
But yes, it is paramount to start at the application level. Proper
application design allows you to run well on a much wider range of hardware.
Yes, that is vital, agreed.
Jim
Received on Mon Dec 15 2008 - 15:45:27 CST