RMAN configuration in ORACLE RAC database

Hi there,
We are using RMAN backup strategy for taking backups from one node(eg.node1).Database is RAC database, version 9.2.3. and OS is Solaris 5.10.
this is the configuration which we use, as follows:
Connecting to Prod.Database using catalog database.
rman catalog=rman/rman@CATDB target=sys/oracle@PRODDB(node 2).
RMAN> show all;
RMAN configuration parameters are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 30;
CONFIGURE BACKUP OPTIMIZATION ON;
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/rmanback/_%F';
CONFIGURE DEVICE TYPE DISK PARALLELISM 5;
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE CHANNEL DEVICE TYPE DISK FORMAT '/rmanback/CMWPROD_%s.bak';
CONFIGURE CHANNEL 2 DEVICE TYPE DISK CONNECT 'SYS/oracle@PRODDB(node2)';
CONFIGURE MAXSETSIZE TO 7 G;
CONFIGURE SNAPSHOT CONTROLFILE NAME TO '/oracle/9.2.3/dbs/snapcf_CMWPROD1.f';
As the above config shows RMAN is connecting to PROD DB (node 2). But we need to take backups (datafiles and as well as archive logs) from two nodes (i.e from node 1 and as well as node 2).
Is there any possibility for taking backups from two nodes?
Thanks,
Balu.

You will need to setup an NFS share such that both nodes can access each other's archived redo logs area. You also need to ensure your LOG_ARCHIVE_DEST_n parameter settings are properly set. Once setup correctly, either node will be able to run the backup and include each other's archived redo log files. Since this is RAC, the data files are shared by design and either node can already backup these files.
Multiple channels would allow 'simultaneous' backup of the archived redo logs.
I would highly recommend using a CFS (single shared file system where all nodes store their archived redo logs distinguished by thread) to store the archived redo logs, this reduces administration and configuration especially when you get ready to scale.
Hope this helps.

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    Khurram                                                                                                                                                                                                                               

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    ORA-205 signalled during: ALTER DATABASE MOUNT...
    Thu Apr 11 09:36:42 2013
    NOTE: initiating MARK startup
    raw devices:
    # ls -l /dev/sd*
    brw-rw-r-- 1 grid asmadmin 8, 16 Apr 11 09:04 /dev/sdb
    brw-rw-r-- 1 grid asmadmin 8, 17 Apr 11 09:51 /dev/sdb1
    brw-rw-r-- 1 grid asmadmin 8, 18 Apr 11 09:51 /dev/sdb2
    brw-rw-r-- 1 grid asmadmin 8, 19 Apr 11 09:51 /dev/sdb3
    brw-rw-r-- 1 grid asmadmin 8, 20 Apr 11 09:45 /dev/sdb4
    brw-rw-r-- 1 grid asmadmin 8, 32 Apr 11 09:04 /dev/sdc
    brw-rw-r-- 1 grid asmadmin 8, 33 Apr 11 09:30 /dev/sdc1
    brw-rw-r-- 1 grid asmadmin 8, 34 Apr 11 09:30 /dev/sdc2
    brw-rw-r-- 1 grid asmadmin 8, 35 Apr 11 09:30 /dev/sdc3
    brw-rw-r-- 1 grid asmadmin 8, 36 Apr 11 09:05 /dev/sdc4
    brw-rw-r-- 1 grid asmadmin 8, 48 Apr 11 09:04 /dev/sdd
    brw-rw-r-- 1 grid asmadmin 8, 49 Apr 11 09:51 /dev/sdd1
    brw-rw-r-- 1 grid asmadmin 8, 50 Apr 11 09:51 /dev/sdd2
    brw-rw-r-- 1 grid asmadmin 8, 51 Apr 11 09:51 /dev/sdd3
    brw-rw-r-- 1 grid asmadmin 8, 52 Apr 11 09:30 /dev/sdd4
    brw-rw-r-- 1 grid asmadmin 8, 64 Apr 11 09:04 /dev/sde
    brw-rw-r-- 1 grid asmadmin 8, 65 Apr 11 09:51 /dev/sde1
    brw-rw-r-- 1 grid asmadmin 8, 66 Apr 11 09:51 /dev/sde2
    brw-rw-r-- 1 grid asmadmin 8, 67 Apr 11 09:51 /dev/sde3
    brw-rw-r-- 1 grid asmadmin 8, 68 Apr 11 09:30 /dev/sde4
    brw-rw-r-- 1 grid asmadmin 8, 80 Apr 11 09:04 /dev/sdf
    brw-rw-r-- 1 grid asmadmin 8, 81 Apr 11 09:51 /dev/sdf1
    brw-rw-r-- 1 grid asmadmin 8, 82 Apr 11 09:51 /dev/sdf2
    brw-rw-r-- 1 grid asmadmin 8, 83 Apr 11 09:51 /dev/sdf3
    brw-rw-r-- 1 grid asmadmin 8, 84 Apr 11 09:30 /dev/sdf4
    brw-rw-r-- 1 grid asmadmin 8, 96 Apr 11 09:04 /dev/sdg
    brw-rw-r-- 1 grid asmadmin 8, 97 Apr 11 09:51 /dev/sdg1
    brw-rw-r-- 1 grid asmadmin 8, 98 Apr 11 09:51 /dev/sdg2
    brw-rw-r-- 1 grid asmadmin 8, 99 Apr 11 09:51 /dev/sdg3
    brw-rw-r-- 1 grid asmadmin 8, 100 Apr 11 09:30 /dev/sdg4
    brw-rw-r-- 1 grid asmadmin 8, 112 Apr 11 09:04 /dev/sdh
    brw-rw-r-- 1 grid asmadmin 8, 113 Apr 11 09:51 /dev/sdh1
    brw-rw-r-- 1 grid asmadmin 8, 114 Apr 11 09:51 /dev/sdh2
    brw-rw-r-- 1 grid asmadmin 8, 115 Apr 11 09:51 /dev/sdh3
    brw-rw-r-- 1 grid asmadmin 8, 116 Apr 11 09:30 /dev/sdh4
    asm disks:
    [09:52 AM [email protected] disks]# ll
    brw-rw-r-- 1 grid asmadmin 8, 65 Apr 11 09:05 ARCLOGDISK1
    brw-rw-r-- 1 grid asmadmin 8, 66 Apr 11 09:05 ARCLOGDISK2
    brw-rw-r-- 1 grid asmadmin 8, 67 Apr 11 09:05 ARCLOGDISK3
    brw-rw-r-- 1 grid asmadmin 8, 68 Apr 11 09:05 ARCLOGDISK4
    brw-rw-r-- 1 grid asmadmin 8, 49 Apr 11 09:05 CTRLDISK1
    brw-rw-r-- 1 grid asmadmin 8, 50 Apr 11 09:05 CTRLDISK2
    brw-rw-r-- 1 grid asmadmin 8, 51 Apr 11 09:05 CTRLDISK3
    brw-rw-r-- 1 grid asmadmin 8, 52 Apr 11 09:05 CTRLDISK4
    brw-rw-r-- 1 grid asmadmin 8, 33 Apr 11 09:05 DBFILEDISK1
    brw-rw-r-- 1 grid asmadmin 8, 34 Apr 11 09:05 DBFILEDISK2
    brw-rw-r-- 1 grid asmadmin 8, 35 Apr 11 09:05 DBFILEDISK3
    brw-rw-r-- 1 grid asmadmin 8, 36 Apr 11 09:05 DBFILEDISK4
    brw-rw-r-- 1 grid asmadmin 8, 113 Apr 11 09:05 FRADISK1
    brw-rw-r-- 1 grid asmadmin 8, 114 Apr 11 09:05 FRADISK2
    brw-rw-r-- 1 grid asmadmin 8, 115 Apr 11 09:05 FRADISK3
    brw-rw-r-- 1 grid asmadmin 8, 116 Apr 11 09:05 FRADISK4
    brw-rw-r-- 1 grid asmadmin 8, 81 Apr 11 09:05 REDODISK1
    brw-rw-r-- 1 grid asmadmin 8, 82 Apr 11 09:05 REDODISK2
    brw-rw-r-- 1 grid asmadmin 8, 83 Apr 11 09:05 REDODISK3
    brw-rw-r-- 1 grid asmadmin 8, 84 Apr 11 09:05 REDODISK4
    brw-rw-r-- 1 grid asmadmin 8, 97 Apr 11 09:05 REDODISK5
    brw-rw-r-- 1 grid asmadmin 8, 98 Apr 11 09:05 REDODISK6
    brw-rw-r-- 1 grid asmadmin 8, 99 Apr 11 09:05 REDODISK7
    brw-rw-r-- 1 grid asmadmin 8, 100 Apr 11 09:05 REDODISK8
    brw-rw-r-- 1 grid asmadmin 8, 17 Apr 11 09:05 VOTEDISK1
    brw-rw-r-- 1 grid asmadmin 8, 18 Apr 11 09:05 VOTEDISK2
    brw-rw-r-- 1 grid asmadmin 8, 19 Apr 11 09:05 VOTEDISK3
    brw-rw-r-- 1 grid asmadmin 8, 20 Apr 11 09:05 VOTEDISK4
    [09:53 AM [email protected] ~]# ls -l /rdbms1/app/oracle/product/11.2.0/db_home/bin/oracle
    -rwsr-s--x 1 oracle asmadmin 210824720 Apr 8 13:39 /rdbms1/app/oracle/product/11.2.0/db_home/bin/oracle
    I know this problem is coming for improper assiging of permissions, but i could not pin point. kindly clarify the same.
    one more thing i need to know.., whenever i rebooted nodes, both of raw devices and asm disks are come to default permission brw------, i have to change every time to brw-rw-r--. is there any way to make these disks and devices permissions make permenet.
    Thanks in advance.

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    I have one two node RAC setup on HP-UX itanium platform and I want to install oracle 10g grid agent on both the RAC nodes to monitor the RAC instances and databases and OMS repository server is ready and running. Only I have installed agents on both the nodes, but tns entry and hosts files on OMS server and both the nodes modified.
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    I have to install grid agent on both the nodes individually or it can be installed on single node and can be integrated with other node.
    Please help me out in this regard.......
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    Edited by: sukanta paul on Aug 18, 2009 10:16 PM

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