From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On 
Behalf Of Galloway, Gary M
>COMMMethod is set to SHAREDMEM  and has been that way from the start.
>I'm got tracing turned on now so we will see if that reveals anything.
>Here is the summary of our archive from last night.  Network(FIBER)
>throughput seems to be ok but the Aggregate is abysmal.  Compression is
>also turned off since we aren't going over ethernet and HW compression
>is turned on at the tape drive.  We are backing up ~32000 file, some in
>the 50-60G range.
>
>Total number of objects inspected:  158,353
>Total number of objects archived:    31,927
>Total number of objects updated:          0
>Total number of objects rebound:          0
>Total number of objects deleted:          0
>Total number of objects expired:          0
>Total number of objects failed:           2
>Total number of bytes transferred:    459.45 GB
>Data transfer time:                  927.99 sec
>Network data transfer rate:        519,159.18 KB/sec
>Aggregate data transfer rate:      8,740.44 KB/sec
>Objects compressed by:                    0%
>Elapsed processing time:           15:18:40

I've got customers that would love to have 8MB/sec aggregates! 

Note your transfer time (930 seconds); this makes your throughput rate,
once data transfer starts, 495MB/sec.

You might be having a lot of retries; they run up your total backup time
without adding to the amount of data being transfered. See how many
retries you see in your dsmsched.log.

--
Mark Stapleton (stapleton AT berbee DOT com)
IBM Certified Advanced Deployment Professional
Tivoli Storage Management Solutions 2005
Office 262.521.5627