check RAC Option in Oracle Binary

It's a simple thing for someone to check RAC is linked in the Oracle Binary.

when we need to convert Single database to RAC database... we may find Error

ORA-00439: feature not enabled: Real Application Clusters

and then we may resolve it by relink library (rac_on)

By the way, we can check Oracle binary before;)

cd $ORACLE_HOME/rdbms/lib

nm -r libknlopt.a | grep -c kcsm.o

returns 0, then RAC is not linked.

returns more than 0, then RAC is linked.

Example:

$ cd $ORACLE_HOME/rdbms/lib

$ nm -r libknlopt.a | grep -c kcsm.o

1

RAC is linked in the Oracle Binary

$ cd $ORACLE_HOME/rdbms/lib

$ nm -r libknlopt.a | grep -c kcsm.o

0

RAC is not linked in the Oracle Binary

shell script (one line)->

if [ -f $ORACLE_HOME/rdbms/lib/libknlopt.a ]; then C=`nm -r $ORACLE_HOME/rdbms/lib/libknlopt.a | grep -c kcsm.o` ; if [ $C -gt 0 ] ; then echo 'RAC is linked in $ORACLE' ; else echo 'RAC is not linked in $ORACLE' ;fi fi

That's step to check...