<snip> > > > Take Tivoli Storage Manager for instance... > > Please do take it -- as the play says: "God bless and keep the Tsar... far > away from us!" That's a good example of an inefficient and poorly > application on ANY platform. Funny thing, the CMS version wasn't nearly such > a pig...but I digress.
Interesting... That hasn't been my experience at all. I recently migrated from ADSM/VM to TSM on zLinux and didn't see a significant difference in MIPs consumption. I haven't had any problems keeping multiple STK 9940 tapes busy at 30-40 MB/sec each. I back up about 30 GB/night, on average. Morning housekeeping activities (expiration/migration/dbbackup) averages 30-50 MIPs for an hour or so. DB is 38 GB, 62% full, 38 million objects, 12 TB storage. Backups at night consume an average of less than 20 MIPs, with exception of one 40-50 MIP spike for an hour or so. I have seen initial backups of large clients run at 1.5+ TB/day. The only time I've seen high I/O rates to the DB was when I ran a GENERATE BACKUPSET of a 4 TB node. For brief periods I would see as many as 2500 IOs/sec and as much as 200 MIPs. I'm not saying this invalidates the experiences of others. Just adding my own to the collection. YMMV. Mark Wheeler, 3M Company
