Could someone explain what the sbtbackup function does
in relation to NBU Oracle RMAN backups.

sbtbackup is part of the libobk library and is called
for Oracle RMAN backups.

We have found that under moderate system load this function
is taking over 15 minutes to complete even on small databases (< 500MB).
If it takes longer than 15 minutes Netbackup aborts as it only waits
for CLIENT_READ_TIMEOUT seconds (which is 15 minutes by default) for
this function to return. This results in status code 6 failures.

Raising the CLIENT_READ_TIMEOUT alleviates the affect however
the problem does not exhibit itself when backing up to disk
versus tape (sbt_tape).

So I would like to know what sbtbackup is actually doing and what
we could do (change the rcv?) to reduce the time this function takes
to complete.

Regards
Peter Marelas