Re: Running 64 bit on P655

Bob.Kelley_at_BRINKSINC.COM
Date: 07/16/03

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Date:         Wed, 16 Jul 2003 16:35:54 -0500
To: aix-l@Princeton.EDU

NP
32bit would be my anwser...thts a good sized nfs box too

Bobby Kelley
Sr. AIX/UNIX Administrator

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Bob,

Thank you for that rundown.

So, if you had a couple P655, 4 processors each, 16 GB of memory each whos
only job was to be NFS servers of 6 TByte of data on EMC Clariion attached
via Fibre HBA to a couple hundred clients, would you run those NFS servers
in 32-bit or 64-bit mode? No JFS2 here.

Christopher M. Baker
Senior Technical Support Analyst
DSE/TCO
Goodyear Tire and Rubber Company

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                      Bob.Kelley@BRINK
                      SINC.COM To: aix-l@Princeton.EDU
                      Sent by: IBM AIX cc: (bcc: Chris
Baker/NA/GDYR)
                      Discussion List Subject: Re: Running 64 bit
on P655
                      <aix-l@Princeton
                      .EDU>

                      07/16/2003 02:41
                      PM
                      Please respond
                      to IBM AIX
                      Discussion List

Quick rundown for ya:

32-bit kernel on 64-bit HW will run 64-bit apps native
64bit kernel is installed by default on 64bit HW but is disabled
to enable/check kernel mode use smitty load64bit
basically, unless you need 96G mem support OR JFS2, I've learned that
32-bit and 64-bit kernel have comparable perf numbers and since 32-bit has
been around much longer, it might be best to run 32

Bobby Kelley
Sr. AIX/UNIX Administrator

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  | Subject: Running 64 bit on P655
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I am kind of new to AIX 5. I have 6 P655's. Four are running AIX 5.2, two
are running 5., for now.

All are running in 32-bit mode - as they were shipped to us.

What do I have to do to run in 64-bit mode?

Any problems running in 64-bit mode?

Thanks,

Christopher M. Baker
Senior Technical Support Analyst
DSE/TCO
Goodyear Tire and Rubber Company

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