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Changing Instance Name ( No DB_NAME)

Posted on 11-Jun-2007 By Admin No Comments on Changing Instance Name ( No DB_NAME)

Note

Instance name : represented by $ORACLE_SID

database name : represented by DB_NAME init.ora parameter.

You can change instance name to any name with following requirements:

Here we are chaning instance name from AWRTEST1 to PARESH.

Exising setup:

ORACLE_SID=AWRTEST1

Step1:

$ export ORACLE_SID=PARESH;

Step2:

Create password file for new instance PARESH.

$ cd $ORACLE_HOME/dbs

$ orapwd file=orapwPARESH entries=10 password=oracle

Step3:

Start New instance. You must specify parameter file as PFILE or need to create pfile link

in $ORACLE_HOME/dbs for this new instance.

$ sqlplus “/ as sysdba”

SQL> startup pfile=’/db1/home/oracle/app/oracle/admin/AWRTEST1/pfile/initAWRTEST1.ora’

Then insance will be started with new name. All backgraound processes have instance name specific postfix.

12:53:21 @PARESH:-> !ps -ef | grep PARESH

oracle 9550 1 1 12:53:11 ? 0:02 ora_mmon_PARESH

oracle 9481 1 0 12:49:58 ? 0:00 ora_s000_PARESH

oracle 9477 1 0 12:49:58 ? 0:01 ora_cjq0_PARESH

oracle 9465 1 0 12:49:57 ? 0:00 ora_dbw0_PARESH

oracle 9467 1 0 12:49:57 ? 0:00 ora_dbw1_PARESH

and so onnnnnnn………….

12:52:44 @PARESH:-> select * from v$database;

DBID NAME CREATED RESETLOGS_CHANGE# RESETLOGS PRIOR_RESETLOGS_CHANGE# PRIOR_RES LOG_MODE

——— ——— ——— —————– ——— ———————– ——— ————

CHECKPOINT_CHANGE# ARCHIVE_CHANGE# CONTROL CONTROLFI CONTROLFILE_SEQUENCE# CONTROLFILE_CHANGE# CONTROLFI OPEN_RESETL

—————— ————— ——- ——— ——————— ——————- ——— ———–

VERSION_T OPEN_MODE PROTECTION_MODE PROTECTION_LEVEL REMOTE_A ACTIVATION# SWITCHOVER# DATABASE_ROLE

——— ———- ——————– ——————– ——– ———– ———– —————-

ARCHIVELOG_CHANGE# ARCHIVEL SWITCHOVER_STATUS DATAGUAR GUARD_S SUPPLEME SUP SUP FOR PLATFORM_ID

—————— ——– ——————– ——– ——- ——– — — — ———–

PLATFORM_NAME

—————————————————————————————————–

RECOVERY_TARGET_INCARNATION# LAST_OPEN_INCARNATION# CURRENT_SCN FLA SUP SUP DB_UNIQUE_NAME

—————————- ———————- ———– — — — ——————————

STANDBY_BECAME_PRIMARY_SCN

————————–

1.870E+09 AWRTEST1 24-MAY-06 11766618 24-MAY-06 2352360 07-NOV-05 NOARCHIVELOG

26714265 26694297 CURRENT 24-MAY-06 18247 26708945 11-JUN-07 NOT ALLOWED

24-MAY-06 MOUNTED MAXIMUM PERFORMANCE UNPROTECTED ENABLED 2.368E+09 2.368E+09 PRIMARY

0 DISABLED NOT ALLOWED DISABLED NONE NO NO NO NO 2

Solaris[tm] OE (64-bit)

2 2 0 NO NO NO AWRTEST

12:53:12 @PARESH:-> select * from v$instance;

INSTANCE_NUMBER INSTANCE_NAME HOST_NAME VERSION

————— —————- —————————————————————- —————–

STARTUP_T STATUS PAR THREAD# ARCHIVE LOG_SWITCH_ LOGINS SHU DATABASE_STATUS INSTANCE_ROLE ACTIVE_ST

——— ———— — ——— ——- ———– ———- — —————– —————— ———

1 PARESH tuningdb21 10.1.0.4.0

11-JUN-07 OPEN NO 1 STOPPED ALLOWED NO ACTIVE PRIMARY_INSTANCE NORMAL

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