We're running ADSM on an RS/6000 model R30 (2 processors) with 768 MB
RAM.  We've got 2 SSA adapters and 1 full drawer (16) of 7133 4.5 GB SSA
disks for the recovery log (mirrored) and the disk storagepools.  Our
database (8 GB) resides on a full populated 7137-514 (?) disk array.
We're also using a 3494 library with 2 3590 drives, each on its own SCSI
adapter.   I was running the 2.1.5.x line of code (supports threads -
can take advantage of  multiple processors) but had to back off to the
2.1.0.x line of code because of some problems we were experiencing.  The
R30 uses the 601 processor and I expect the 604 processor upgrade we'll
be getting shortly will help us out (not sure what kind of processor the
C10 uses).  Couple of things to consider...

1) Do you need to run expiration processing daily ??  I've found that
running it just once a week on the weekends is sufficient.
2) Check your buffer pool sizes (i.e. cache hit ratios) and increase
them if necessary.  As with any database, ADSM likes to have memory
thrown at it :-)
3) I suspect having 1 SCSI port for you db/log/pools might be hurting
you... any way you can split at least the database onto a separate
adapter/set of drives ?  Another options would be to keep the db and log
on the EMC disks and take a look at IBM's SSA disks for the disk storage
pools.


Tim Pittson
tpittson AT himail.hcc DOT com

>----------
>From:  Jeff Reichard[SMTP:jtr AT LELAND.STANFORD DOT EDU]
>Sent:  Tuesday, September 03, 1996 4:20 PM
>To:    Multiple recipients of list ADSM-L
>Subject:       AIX Server Hardware
>
>We have a question for folks on the list using the AIX ADSM server on
>an
>RS-6000.  We're currently using an RS-6000 C10 with 128 MB RAM.  It's
>running AIX 4.1.3 and ADSM Server version 2.1.3.  Our disk storage
>pools,
>database, and log are on 8 4.5 GB EMC disks connected via one SCSI port
>to
>the server.  Our tape storage pools are on a 3494 Magstar tape library
>using
>two 3590 drives.
>
>Our current ADSM setup is as follows:
>ADSM Database: 4 GB mirrored
>ADSM Log:       756 MB mirrored
>Primary storage pools:  400 GB data used, 400 GB free
>Copy storage pools:     400 GB data used, 400 GB free
>Daily incremental backup volume:        12 GB
>
>We've noticed that our CPU use during many daily processes
>(reclamation,
>inventory expiration) seems to be creating a bottleneck.  The SAR -Q
>command, for example, shows our cpu queue frequently around 2.6, and
>sometimes up to 3.
>
>And now the question for those of you also using the AIX server: what
>hardware configurations are you using - especially what kind of
>RS-6000?
>The C10 seems underpowered in both processor and SCSI ports for our
>needs.
>Are the kind of CPU loads we're seeing normal for this product and
>platform?
>We're trying to figure out what, if anything, we'd gain by upgrading
>our
>server to a faster RS-6000.  Any advice folks here could offer would be
>appreciated,
>
>Jeff Reichard
>Ota Likar
>
>-----------------------------------------------------------------------
>Stanford Unix Systems Group
>