ORACLE RAC DATABASE SERVER REBOOT PROCESS
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Current RAC 4 node Setup
• FOR EASYDB (4-NODE RAC DATABASE on ASM) with four Node Standby Database
➢ DOWN PROCESS:
1) Check log sequence number of all four nodes and make sure it is in sync (DC & DR).
SQL> SELECT MAX(SEQUENCE#),THREAD# FROM V$LOGHIST GROUP BY THREAD#; (both DC & DR).
2) DEFER dataguard (DC side).
SQL> ALTER SYSTEM SET log_archive_dest_state_2='DEFER' SID='*';
3) Stop MRP process (DR side).
SQL> alter database recover managed standby database cancel;
4) Down all Instances.
Login with ‘oracle’ session on master node i.e., EASYNODE1:
EASYNODE1:/home/oracle#srvctl stop database –d EASYDB (both DC & DR).
5) Dismount diskgroups such as EASYDBDATA_DG1, EASYDBDATA_DG2,
EASYDBFRA_DGNEW, EASYDBREDO_DGNEW, and EASYDBTEMP_DGNEW.
Login with ‘orarac’ session and connect to ‘sqlplus / as sysasm’:
SQL> alter diskgroup EASYDBDATA_DG1 dismount;
SQL> alter diskgroup EASYDBDATA_DG2 dismount;
SQL> alter diskgroup EASYDBFRA_DGNEW dismount;
SQL> alter diskgroup EASYDBREDO_DGNEW dismount;
SQL> alter diskgroup EASYDBTEMP_DGNEW dismount;
6) Stop ASM service.
Login with ‘orarac’ session on master node i.e., EASYNODE1:
EASYNODE1:/home/orarac#srvctl stop asm
7) Stop cluster service and handover to UNIX team for reboot the nodes.
Login with ‘orarac’ session on master node i.e., EASYNODE1:
EASYNODE1:/home/orarac#srvctl stop asm
EASYNODE1:/home/orarac#crsctl stop cluster all
or
stop cluster/crs on all node by root user after shutting down database .
cd /GRIDHOME/bin
./crsctl stop crs - run on each node or one by one as per requirement
➢ UP PROCESS:
1) After get back the servers from UNIX team, First check binary mount points
such as ‘/oracle’ & ‘/asm_grid’ from all 4 nodes.
EASYNODE1:/home/dxc_subhankar#df –gt
2) Start cluster services if it is not started automatically
Login with ‘orarac’ session:
EASYNODE1:/home/orarac#crsctl start cluster all
3) Start ASM services.
Login with ‘orarac’ session on master node i.e., EASYNODE1:
EASYNODE1:/home/orarac#srvctl start asm
4) Mount diskgroups such as EASYDBDATA_DG1, EASYDBDATA_DG2, EASYDBFRA_DGNEW,EASYDBREDO_DGNEW, and EASYDBTEMP_DGNEW.
Login with ‘orarac’ session and connect to ‘sqlplus / as sysasm’:
SQL> alter diskgroup EASYDBDATA_DG1 mount;
SQL> alter diskgroup EASYDBDATA_DG2 mount;
SQL> alter diskgroup EASYDBFRA_DGNEW mount;
SQL> alter diskgroup EASYDBREDO_DGNEW mount;
SQL> alter diskgroup EASYDBTEMP_DGNEW mount;
or
start the clusterware if it is not started from root user
cd $ORACLE_GRID/bin
./crsctl start crs -- run it on all node or one by one based on requirement
5) UP all Instances.
Login with ‘oracle’ session on master node i.e., EASYNODE1:
EASYNODE1:/home/oracle#srvctl start database –d EASYDB (both DC & DR).
6) ENABLE dataguard (DC side).
SQL> ALTER SYSTEM SET log_archive_dest_state_2='ENABLE' SID='*';
7) Start MRP process (DR side).
SQL> alter database recover managed standby database disconnect from session;
8) Do some alter switch (DC side) and check archives are receiving (DR side).
SQL> alter system switch logfile;
9) Do tnsping to check network connectivity, if everything looks fine handover to application team.
