Connecting to RMAN

Step 1: Set the following environment variables

ORACLE_SID
ORACLE_HOME
NLS_DATE_FORMAT

Step 2: Access to privileged OS account or user with Sysdba privilege. Only users with Sysdba privilege can connect to RMAN. Hence no need to specify as sysdba while connecting to RMAN.

$ cd $ORACLE_HOME/bin
$ rman target /

Recovery Manager: Release 10.2.0.1.0 - Production on Wed Jan 20 03:19:22 2010
Copyright (c) 1982, 2005, Oracle. All rights reserved.
connected to target database: IRIS (DBID=1460454352)

If you are using password file, then specify the username and password

$ rman target sys/syspassword

If you are accessing the target database via oracle net then use connection string as follows

$ rman target sys/syspassword@

You can also connect to RMAN in two steps first by invoking the rman

$ rman

The RMAN prompt appears

RMAN>

To connect to the target datbase..

RMAN> Connect target /
RMAN> Connect target sys/syspassword
RMAN> Connect target sys/syspassword@

Once you have connected to RMAN, you can start entering the commands. The commands can be typed in single line or in multiple lines and ends with a semicolon.

RMAN> Backup
2 database;

To add comments use the # symbol. Text after the # symbol in a line is interpreted as comments

RMAN> # Backup database
Backup database # this command will backup the database
include current controlfile; # backup control file along with database

Thanks

Remote_login_passwordfile

The password file is used to authenticate the users connecting to the database as Sysdba or Sysoper. The password file is created with the orapwd utility as follows,

$ cd $ORACLE_HOME/dbs
$ orapwd file=orapw password= entries=

Where,
file = the filename where the password is stored.
password = the password for sys user
entries = the number of users that can connect as sys user at a time. This parameter is optional.

Once the password file is created you need to set the init parameter remote_login_passwordfile for the database to use it.

The possible values for the parameter is

EXCLUSIVE - Only one database can use the password file. Multiple users can exist in the password file.

SHARED - More than one database can use the password file. However only Sys users allowed to have sysdba privilege. You will receive ORA-01999 error when you grant sysdba privilege to other users.

NONE - The password file is not used.

Thanks

ASM Views

The following V$views are used for managing ASM.

View Name	Description	Instance
V$ASM_DISKGROUP	Diskgroups discovered by ASM	DB
V$ASM_DISK	Disks discovered by ASM including disks that are not part of any Diskgroup.	DB
V$ASM_FILE	ASM files mounted by ASM instance	ASM
V$ASM_ALIAS	Filename alias of the ASM Files	ASM
V$ASM_OPERATION	Long running ASM operations	ASM
V$ASM_TEMPLATE	Template present in diskgroup	DB
V$ASM_CLIENT	Lists one row per each ASM instance for which the database instance has any open ASM files	DB

Thanks