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In the new box:
4gig of Ram 
27 - 35gig disk units - 15k rpm
2780 controller
RAID5

>>> John.Jones@xxxxxxxxxx 7/20/05 11:58 AM >>>
Huge?  :)

Well, actually it depends:
- Does the new box have the appropriate amount of RAM?  You're
tripling
the theoretical max CPWs but max throughput cannot be achieved without
sufficient RAM.
- Is the number of disk arms sufficient?  It can be less than your old
box, as Rob has commented on in the past, but too few can still create
a
choke-point.
- 10K or 15K disks?
- 2780 or other disk controller?  Mirroring or RAID5?

We are looking to make the same jump - 820-1523 (370cpw) to 520-7459
(1000cpw). What kind of performance improvement should we expect,
especially in batch, if all else stays the same? We would be going to
new dasd as well.

Dave


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