Daily database backup runnig on RAC 10.2.0.3 with two Solaris nodes & ASM

Question

Hello,
I'm confused about making daily incremental RMAN backup of a database runnig on Oracle RAC 10.2.0.3 on two Solaris nodes and ASM.
Databases cannot be stopped for backup and point in time recovery is needed.
Please correct me if I am doing wrong:
1) Backup must be Weekly database Level 0 and Daily database Level 1 is appropriate.
2) Is best to use a Flash Recovery Area (FRA) - I've setup one on a separate ASM volume. I have enough space to do the backup on FRA.
3) I am confused about the number channels I need to use. Do I need to use separate RMAN backup channels for each node or I can just leave the default:
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default
4) Below are the RMAN scripts I plan to use for
- Weekly database backup Level 0:
#!/usr/bin/ksh
echo BACKUP FULL: $ORACLE_HOME/bin/rman target / nocatalog log ${LOGFILE} append
$ORACLE_HOME/bin/rman target / nocatalog log ${LOGFILE} append << eof
run {
backup incremental level 0 database TAG bkp_level0_200906010;
SQL 'alter system archive log current';
backup archivelog all;
delete noprompt obsolete;
exit;
eof
- Daily database backup Level 1:
#!/usr/bin/ksh
echo BACKUP INCREMENTAL: $ORACLE_HOME/bin/rman target / nocatalog log ${LOGFILE} append
$ORACLE_HOME/bin/rman target / nocatalog log ${LOGFILE} append << eof
run {
backup incremental level 1 database TAG bkp_level1_20090611;
SQL 'alter system archive log current';
backup archivelog all;
delete noprompt obsolete;
exit;
eof
I'm I doing things wrong?

Answer 1

Show also the parameter I have set for RMAN:
node1:oracle$ rman target /
Recovery Manager: Release 10.2.0.3.0 - Production on Tue Jun 9 23:46:05 2009
connected to target database: ORCL (DBID=1198388159)
RMAN> show all;
RMAN configuration parameters are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 7;
CONFIGURE BACKUP OPTIMIZATION ON;
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '%F'; # default
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
CONFIGURE SNAPSHOT CONTROLFILE NAME TO '/u01/oracle/product/10gr2/db/dbs/snapcf_orcl1.f'; # default
Showing some instance parameters on node1:
SQL> show parameter recovery;
NAME                                 TYPE        VALUE
db_recovery_file_dest                string      DGFRA+
db_recovery_file_dest_size           big integer 300G
recovery_parallelism                 integer     0
SQL> show parameter archive;
NAME                                 TYPE        VALUE
archive_lag_target                   integer     0
log_archive_config                   string
log_archive_dest                     string
log_archive_dest_1                   string
log_archive_dest_10                  string      location=use_db_recovery_file_
dest
log_archive_dest_2                   string
log_archive_dest_3                   string
log_archive_dest_4                   string
log_archive_dest_5                   string
log_archive_dest_6                   string
NAME                                 TYPE        VALUE
log_archive_dest_7                   string
log_archive_dest_8                   string
log_archive_dest_9                   string
log_archive_dest_state_1             string      enable
log_archive_dest_state_10            string      enable
log_archive_dest_state_2             string      enable
log_archive_dest_state_3             string      enable
log_archive_dest_state_4             string      enable
log_archive_dest_state_5             string      enable
log_archive_dest_state_6             string      enable
log_archive_dest_state_7             string      enable
NAME                                 TYPE        VALUE
log_archive_dest_state_8             string      enable
log_archive_dest_state_9             string      enable
log_archive_duplex_dest              string
log_archive_format                   string      %t_%s_%r.dbf
log_archive_local_first              boolean     TRUE
log_archive_max_processes            integer     2
log_archive_min_succeed_dest         integer     1
log_archive_start                    boolean     FALSE
log_archive_trace                    integer     0
remote_archive_enable                string      true
standby_archive_dest                 string      ?/dbs/arch