RE: %ASP Used

["Jones, John (US)" <John.Jones@xxxxxxxxxxxxxxxxxxxxxxx>]

Facetious.  When it came time to add disks, I went with the fastest I
could get.  BCC 15K RPM short-stroked drives.  Throughput of the
individual disks is not a problem.  

However, throughput of the SPD bus is.  It just is not fast enough
anymore.  Example:  We upgraded to 3580-H23 Ultrium2 tape drives.  On
the 730, SPD we get ~70GB an hour.  On our 830, I can get 200GB/hour.
That's a test result backing our production JDE database.  The tape
drives are very fast and I wouldn't hesitatie to recommend them to
anyone.  But to get their full performance capabilities, you'll need to
be on the PCI-X bus.

Anyway, I don't anticipate need more arms for the next year or two.

-----Original Message-----
From: Charly Jones [mailto:charly301@xxxxxxxxxxx] 
Sent: Wednesday, November 19, 2003 1:54 PM
To: midrange-l@xxxxxxxxxxxx
Subject: RE: %ASP Used





>From: "Jones, John (US)" <John.Jones@xxxxxxxxxxxxxxxxxxxxxxx>
>
>I'll always spec more disk if I'm starting to get over 75-85% on a 
>consistent basis, but over the past 3 or 4 years, the number of arms 
>and speed of the disks has been more relevant here and I've been 
>nowhere near the threshold.  So, my production machine is suffering at 
>about 33% used right now.  Yet I still go after the app guys for 
>cleanup as another concern is keeping the backup window under control.
>
>FWIW, the production machine is a 730 with 65 17.5GB drives, 2 ASPs, 
>and RAID5.
>

Your production machine is "suffering" because of too few arms or
because of 
disks
that aren't spinning fast enough?  Or were you being facetious???

--  Charly

Charly Jones
Gig Harbor WA
253 265-6244

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