I'm very dissapointed with the performance of our TSM environment, and I was curious what kinds of numbers some of you with similar environments have experienced. I've worked extensively with IBM to try and tune things, but apparently we've got everything adjusted correctly. We are in the process of cleaning up System Object stuff, so I'm wondering if I should expect things to improve dramatically once we trim all that fat.
I apologize for the lenght of the post, but I want to include as much info as possible. I'm in dire need of a solution. Our basic setup: IBM 6H1 - 6 Processors / 4GB RAM TSM 4.2.3 on AIX 4.3.3-09 LTO 3584 Tape Library with 10 drives Fiber-arbitrated loop going through McData ES-1000 switches and McData 6064 Directors 500GB Non-Collocated Disk Pool on ESS 250GB Collocated Disk Pool on ESS 37GB TSM database Approximately 200 Clients (mixture of AIX and WinNT/2K) running at various client versions 200GB total / night backed up on average. Daily Processing is slow, slow, slow. Here are the steps for our daily processing (its all scheduled, but I'm just showing you what runs when): 1) 7:00:00 - Daily processing starts backup stg nocodisk copypool maxproc=4 wait=yes backup stg colodisk copypool maxproc=4 wait=yes 2) Once that is finished the migrations start (I have the maxproc on both pools set to 5) update stg nocodisk hi=0 lo=0 update stg colodisk hi=0 lo=0 3) Once Migration is finished update stg nocodisk hi=90 lo=70 update stg colodisk hi=90 lo=70 backup stg nocotape copypool maxproc=3 wait=yes backup stg colotape copypool maxproc=3 wait=yes 4) Once that is finished expire inventory 5) Once that is finished backup db devclass=ltotape type=full 6) Then backup volhist backup devconfig prepare So, the big disappointment is on steps 1 and 2. Our disk to tape performance averages about 20GB/hour per tape drive. If I reduce the number of mount points, that number goes down even more. Are LTO's really this slow? IBM says these suckers will do 50-100GB/hour. With 10 drives, we were told we could handle about 1-2 TB/day, and we're only dealing with 200GB and the entire daily processing takes more than 6 Hours!!! At one time we were using disk caching, and I was told that slowed down disk to tape performance, so we turned it off. I saw a slight improvement, but nothing major. The Noncollocated disk pool still has data in it that has not expired yet since I turned off caching. Could that still be slowing things down if the pool isn't completely flushed? What can I really expect to get as far as performance? How long should daily processing really take for only 200GB worth of data? Any help is greatly, greatly appreciated! Thanks! -Kevin This E-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended only for the use of the Individual(s) named above. If you are not the intended recipient of this E-mail, or the employee or agent responsible for delivering it to the intended recipient, you are hereby notified that any dissemination or copying of this E-mail is strictly prohibited. If you have received this E-mail in error, please immediately notify us at (865) 374-4900 or notify us by E-mail at [EMAIL PROTECTED]
