That seems terribly slow. 430 GB in 14 hours is only 8.7 MB/s aggregate throughput. Over four streams that's only 2 MB/s/stream. It has been my experience that the source hdisks are usually the bottleneck.
There are only two tunables for the switch adapter, rpoolsize and spoolsize. These can be changed, for example: chdev -l css0 -a spoolsize=14680064 chdev -l css0 -a rpoolsize=16777216 A couple of things that come to mind: - are you mixing machines with 32 and 64 bit kernels on the same SP Switch? - what version of AIX are you running? What version of PSSP? What tape drives do you have? - what are your vmtune settings? - where is the bottleneck? - is the switch performing well? - check the source disks - check the VMM >>> [EMAIL PROTECTED] 10-Sep-03 2:18:05 PM >>> ** High Priority ** Hi TSMers, I hope someone got experiance on same before . This is problem about db2(7.1) backups on high speed switch to TSM .Present we are taking 430Gb of data to tsm which is taking 14 hrs to finish.recently I have changed couple of paramters on 'css' and 'no' to improve performance based on IBM docs.Still my backups takes same time. no doubt I missed some parts on TSM/AIX/db2 to lubricate. Please can any one dump some ideas to fix this this and how long its taking in ur environment same setup. We are using four session on db2(7.1) and copying to tape pools directly. please send ur back times with same environments. please send me some tips to make my backups fast. please write if wants information. thanks and regards muthyam ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ This electronic mail transmission contains information from Joy Mining Machinery which is confidential, and is intended only for the use of the proper addressee. If you are not the intended recipient, please notify us immediately at the return address on this transmission, or by telephone at (724) 779-4500, and delete this message and any attachments from your system. Unauthorized use, copying, disclosing, distributing, or taking any action in reliance on the contents of this transmission is strictly prohibited and may be unlawful. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ <<privacy>>
