That's a very good point. Especially the larger AIX SMP boxes (my favorite
of course, S70 & Co.) have more bus power and can easily drive high speed
networking cards, SSA disks AND a bunch of SCSI chains for tape drives.

Mit freundlichem Gruss/Best Regards

Michael Abel
IBM Certified Advanced Technical Expert - RS/6000 AIX
IBM Certified Specialist - ADSM
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Richard Sims <rbs AT BU DOT EDU> on 02.11.98 19:08:15

Please respond to "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>

To:   ADSM-L AT VM.MARIST DOT EDU
cc:    (bcc: Michael Abel/resnova)

Subject:  Re: ADSM and n-way RS/6000's




>So multiple CPUS would be better than a faster one?

Our experience with RS/6000 R3U systems is that the concurrency you get
with multiple processors is much better than having a single processor,
even if in our case the individual PPC 604 processors are individually
somewhat slower than a single Power2 system would be.  Stuff an MP with
memory to correlate with the number of processors, and caching will do
nicely.  The limiting factor will be I/O speed: MP systems tend to have
multiple I/O planar boards to help out in that respect such that the
system bus is not tied up by one processor at a time.
    Richard Sims, BU