We are experiencing and interesting problem on our TDP for R3 restores.
We have an old E4000 being used as a development system. We are at Solaris 8
patch 17. TIVsmCapi - 4.2.1 TIVsmCba - 4.2.1 and TDP/R3ora64 - 3.2.0.11. We
back up fine. On restore, things start out good. We use netstat to monitor
the number of packets moving into the E4000 from the TSM server. Runs along
moving 8-10,000 packets every 5 seconds. Then it just drops off to 400
packets every 5 seconds. It stays there.
We have found that if we disable 5 of the six processors using the psradm
command, it will kick the process back up. We then put the processors back
on line and continues at 8-10,0000 packets again. Maybe 15 minutes later we
have to repeat the process again because it drops back to 400.
Paul Seay had a similar  problem about a year ago, he stated that:
"What we have been able to determine is that the tape drives run so fast on
the restore they apparently overrun the TCP/IP buffers used to transfer data
from the tapes to the multiple threads necessary to support the restore. The
restore fails every time unless the number of drives and sessions are set to
1 during the restore. "
Paul if your listening how do you know that the TCP/IP buffers are being
saturated? I would like to check that as well.
Thanks.


Bruce E. Lowrie
Sr. Systems Analyst
Information Technology Services
Storage, Output, Legacy
*E-Mail: b.e.lowrie AT dowcorning DOT com
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