The best you can do is to configure two backup channels, one to each node.  However, you still have to monitor the backup for errors / failures.

Hemant K Chitale

Hi

Refer this below documents

http://docs.oracle.com/cd/E11882_01/rac.112/e17264/racbureco.htm#TDPRC260

Try to use Multiple channel configuration for rac db instance

For example

One time configuration rman:

------------------------

Configure device type disk/tape parallelism 2;

configure channel ch1 connect 'sys/psswd@tns_inst1';

configure channel ch2 connect 'sys/psswd@tns_inst2';

one time configuration with service name

-------------------------------------

Configure device type disk/tape parallelism 2;

configure channel ch2 connect 'sys/psswd@service_name';

RUN {

ALLOCATE CHANNEL CH1 CONNECT 'SYS/PASSWD@TNS_INST1';

ALLOCATE CHANNEL CH2 CONNECT 'SYS/PASSWD@TNS_INST2';

BACKUP DATABASE PLUS ARCHIVELOG;

RELEASE CHANNEL CH1;

RELEASE CHANNEL CH2;

}

Hi

In RAC, we can allocate multiple channels from both the RAC instances so that we can utilize RAC servers for taking backup quickly.

Example : allocate channel c1 type disk connect 'sys/password@inst1';
                     allocate channel c2 type disk connect 'sys/password@inst2';

Thanks

LaserSoft

There is no need to include any other parameter except a valid value from service_name. Make sure this Service is configured to run on both nodes.

Hi Liang,

You can setup two identical backup scripts on both RAC nodes and use dbms_scheduler to run the backup as an external job.

> My concern is how to configure if node 1 fail during the backup..

Make sure to configure the job to retry after failure.

Regards,

Tycho

Hi,

From 11gR2 onwards, the controlfile backup happens without holding the controlfile enqueue. For non-RAC database, this doesn't change anything. But for RAC database, due to the changes made to the controlfile backup mechanism in 11gR2, any instance in the cluster may write to the snapshot controlfile. Due to this snapshot controlfile need to be visible to all instances. 

The snapshot controlfile MUST be accessible by all nodes of a RAC database, if the snapshot controlfile does not reside on a shared device error will be raised at the time of RMAN backup while taking snapshot of controlfile.

Thanks,

Renu