Hello there!

I'm moving from NMO to NMDA and have been facing performance issues while allocating tape channels with RMAN.

Basically, my archive backup script is like this:

run {

allocate channel t1 type 'SBT_TAPE' parms 'ENV=(NSR_SERVER=servername,NSR_DATA_VOLUME_POOL=poolname,NSR_SAVESET_EXPIRATION=expiration)';

allocate channel t2 type 'SBT_TAPE' parms 'ENV=(NSR_SERVER=servername,NSR_DATA_VOLUME_POOL=poolname,NSR_SAVESET_EXPIRATION=expiration)';

allocate channel t3 type 'SBT_TAPE' parms 'ENV=(NSR_SERVER=servername,NSR_DATA_VOLUME_POOL=poolname,NSR_SAVESET_EXPIRATION=expiration)';

allocate channel t4 type 'SBT_TAPE' parms 'ENV=(NSR_SERVER=servername,NSR_DATA_VOLUME_POOL=poolname,NSR_SAVESET_EXPIRATION=expiration)';

# switch logfile before backing up archive logs

sql 'alter system archive log current';

# backup of all archive logs delete afterwards

backup filesperset 20

format 'LOG_%U'

(archivelog all delete input);

}

It is taking 10 minutes, only to allocate these 4 tape channels.

The same script, running with NMO allocate the same 4 channles in seconds !!!

I'm running Oracle Enterprise Edition 11.2.0.4 on a RHEL 6.4 64 bits

Have you seen this kind of problem before?

See ya,

Rafa