EMC supports now IBM's (AIX) MPIO with usage of "defauly PCM for fibre
attached Symmetrix devices." "CLARiiON support is targeted in the near
future". (Readme on ODM entrys for AIX, EMC document).

Is Powerpath still needed when AIX MPIO is used on EMC stirage devices
(technical question, not a licensing one)? Or has Powerpath stil
technical added value in combination with IBM's AIX MPIO?

Bernard Dhooghe

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On 29 Jul 2004 00:17:25 -0700, nomen@attglobal.net (Bernard Dhooghe)
wrote:

>EMC supports now IBM's (AIX) MPIO with usage of "defauly PCM for fibre
>attached Symmetrix devices." "CLARiiON support is targeted in the near
>future". (Readme on ODM entrys for AIX, EMC document).

>Is Powerpath still needed when AIX MPIO is used on EMC stirage devices
>(technical question, not a licensing one)? Or has Powerpath stil
>technical added value in combination with IBM's AIX MPIO?
I'm not sure how MPIO exactly works, but the optimized policy for the
Symmetrix is pretty sophisticated. We tested the policies for
performance, sym_opt indeed works best for us (Random I/Os of
different sizes). YMMV.
I think the Problem with the Clariion is the LUN trespass from one SP
to the other, MPIO probably can't work with this feature.

Frank

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