I want to thank everyone who responded to my question(s). It seems that
*EVERYONE* goes faster than us, some by a big margin.
I just finished upgrading the OS/390 server from ADSM 3.1.2.50 to TSM
4.1.3. I was hoping the DB backup would be faster. Unfortunately, there is
"no joy in Mudville".
The first full DB backup performed after the upgrade took 4h 43m.
I am still looking for suggestions on how to improve these numbers.
Changing the backup to 3590 drives/tapes only shaved about 20 minutes off
the time. That mostly accounts for rewind and mount times (1-3590 vs
9-3490).
I have bumped the BUFPOOLSIZE value to 80M but still cant achieve the
elusive 98+% "Cache Hit Pct.".
I've thought about trying SELFTUNEBUFPOOLSIZE but am a little concerned
since we are currently somewhat real-storage constrained and TSM is
currently at over 120M WSS, already.
Anyone have any experience with this new option ? Any suggestions/tips to
improve the DB backup performance ?
f adsm,q db f=d
ANR5965I Console command: Q DB F=D
Available Space (MB): 17,496
Assigned Capacity (MB): 17,496
Maximum Extension (MB): 0
Maximum Reduction (MB): 3,020
Page Size (bytes): 4,096
Total Usable Pages: 4,478,976
Used Pages: 3,700,667
Pct Util: 82.6
Max. Pct Util: 82.6
Physical Volumes: 8
Buffer Pool Pages: 20,480
Total Buffer Requests: 63,986,411
Cache Hit Pct.: 95.31
Cache Wait Pct.: 0.00
Backup in Progress?: No
Type of Backup In Progress:
Incrementals Since Last Full: 0
Changed Since Last Backup (MB): 376.67