From: Raj Atwal (tatwal@YAHOO.COM)
Date: Wed Jul 03 2002 - 14:09:29 EDT
I guessed you did RTFM, but thought it was worth
having a look for my own curiosity. ;)
And I agree, if you looking to fully utilize the FWC,
you are gonna have to cough up the money for the
SDRAM.
Good luck.
--- "Green, Simon" <SGreen@KRAFTEUROPE.COM> wrote:
> Thanks; I did what I should have done in the first
> place: RTFM.
>
> Apparently, in a cluster situation if you don't have
> the 128MB DRAM you
> can't take full advantage of the Fast-Write cache
> and it'll only use 16MB
> instead of the full 32MB. Since what we really want
> is the FWC, we better
> cough up the money for the SDRAM as well.
>
> Simon Green
> Philip Morris ITSC Europe
>
> AIX-L Archive at
> http://marc.theaimsgroup.com/?l=aix-l&r=1&w=2
> AIX FAQ at http://www.faqs.org/faqs/aix-faq/
>
> N.B. Unsolicited email from vendors will seldom be
> appreciated.
>
> > -----Original Message-----
> > From: Raj Atwal [mailto:tatwal@YAHOO.COM]
> > Sent: 03 July 2002 18:29
> > To: aix-l@Princeton.EDU
> > Subject: Re: IBM 6230 SSA Adapter DRAM
> >
> >
> > According to the technical reference guide for
> that
> > adapter, increasing the DRAM from 64MB to 128MB on
> a
> > RS/6000 or SP makes available "support for full
> 32mb
> > write cache in a 2-way cluster".
> >
> > So I guess you should see some performance gain,
> > although how much I am unsure.
> >
> >
> >
> > --- "Green, Simon" <SGreen@KRAFTEUROPE.COM> wrote:
> > > What is the effect of increasing DRAM on the
> 6230
> > > from 64 to 128MB?
> > >
> > > This will be in an HACMP cluster with six
> adapters
> > > in each server and twelve
> > > separate loops, (so one adapter from each server
> in
> > > each loop).
> > >
> > > We'll also be getting fast-write cache.
=====
Raj Atwal
Senior Systems Consultant
Braegen Group Inc.
67 Yonge Street
Toronto
Ontario
(416) 366 6363
__________________________________________________
Do You Yahoo!?
Sign up for SBC Yahoo! Dial - First Month Free
http://sbc.yahoo.com
This archive was generated by hypermail 2.1.7 : Wed Apr 09 2008 - 22:16:02 EDT