put rac database in archivelog mode

Putting Oracle clustered(RAC) database in archivelog is very easy,only step that differs from single instance is set cluster_database=false while running statement alter database archivelog

1. set init parameter cluster_database =false
2. shutdown the database
3. startup mount
4. alter database archivelog;
5. set init parameter cluster_database =true
6. satrtup open