slow controlfile restore

[zmajcenic]

Hello,

I have a problem with performance of Oracle restore through TDP. Backup is made on one machine with RMAN + TDPO 5.5.1 + Storage agent 6.1 to tape. TSM is 6.1.3.4. RMAN makes autobackup of control file.
Restore on other machine basically works but it takes like 30-40 mins to recover controlfile. So pretty much when I start RMAN recover script is says he is looking for control file, there is a pause of 30-40 mins until he tracks it down and then restore works quite fast. DBF files are restored quickly.
Is this normal for controlfile tracking to take so long ?
When I look at TSM actlog during controlfile restore, TDPO opens a session every 5s and closes it immeadiately.

Any suggestions ?
Thanks

 

[moon-buddy]

there is a pause of 30-40 mins until he tracks it down and then restore works quite fast. DBF files are restored quickly.
Is this normal for controlfile tracking to take so long ?

Maybe normal and depends highly on how you do backups, and the type of tape technology you use.

If you mix your backup in one big pot, then the search can take longer.

What kind of tape technology (real or VTL?) do you use?