I would be suspicious of having the db on XIV. Do you have any FC or SAS Disk 
you could try putting the DB on?  I know XIV has lots of CPU & cache, but 
underneath it all is still SATA. I've heard Marketing types rave about how fast 
XIV is, even with SATA, because I/O can be spread across many spindles, but I'm 
not entirely convinced it's as good as 15k FC or SAS. 

..Paul


On Oct 8, 2010, at 12:27 PM, "Andrew Carlson" <naclosagc AT GMAIL DOT COM> 
wrote:

> Hi all
> 
> I am running TSM 6.2.1.1 on AIX V615 in a LPAR on a P770.  The LPAR
> has 6 shared CPU's, 12 virtual CPU;s, and 64GB of memory.  There are 2
> VIO servers with 4 fiber channel connections to XIV storage for the DB
> and LOG, and 2 10Gbit Ethernet in each VIO in an Etherchannel
> configuration.  The storage pool is on Data Domain DD880's, 2 per AIX,
> 1 per instance.
> 
> I am seeing consistenly poor performance from this setup.  I have
> tested network from VIO to cloud, and LPAR to VIO, which seems fine.
> I tested LPAR to Data Domain, and things seem fine.  But, when backups
> are running (and I only have a few nodes there yet, this is a new
> setup), TSM doesn't seem to want to go over 20 to 30MB/s throughput.
> I tried backing up the TSM server over lo, and that was a little
> better at 50MB/s, but not screaming.  I tried using chunk of SAN as a
> disk pool ahead of the Data Domain, no change.  I am at my whit's end.
> 
> If anyone has any ideas, please let me know.  Thanks.
> 
> --
> Andy Carlson
> ---------------------------------------------------------------------------
> Gamecube:$150,PSO:$50,Broadband Adapter: $35, Hunters License: $8.95/month,
> The feeling of seeing the red box with the item you want in it:Priceless.