Tuesday, November 18, 2014

STEP BY STEP GUIDE FOR CREATION OF SINGLE NODE STANDBY FROM 2 NODE RAC



  • CRETE A PASSWORD FILE FROM RAC NODE 1 AND COPY IT TO ORACLE_HOME/dbs DIRECTORY TO NODE2 AND DISASTER RECOVERY SITE
PROD1$ cd $ORACLE_HOME/dbs
PROD1$orapwd file=orapwCATDB1 entries=5 force=y
PROD1$scp orapwCATDB1 oracle@PROD2:$ORACLE_HOME/dbs
PROD1$scp orapwCATDB1 oracle@STDBY:$ORACLE_HOME/dbs

                          ON SECOND NODE
PROD2$cd $ORACLE_HOME/dbs
PROD2$mv orapwCATDB1 orapwCATDB2

                          ON STANDBY NODE
STDBY$cd $ORACLE_HOME/dbs
STDBY$mv orapwCATDB1 orapwCATDBSTDBY
  • MODIFY THE tnsnames.ora (found in $ORACLE_HOME/network/admin directories in each server) FILE  TO CONTAIN THE FOLLOWING ENTRIES

CATDB1 =
    (DESCRIPTION =
        (ADDRESS = (PROTOCOL = TCP)(HOST = PROD1)(PORT = 1521))
         (CONNECT_DATA =
            (SERVER = DEDICATED)
              (SERVICE_NAME = CATDB)
            (SID = CATDB1)
       )
  )

CATDB2 =    

     (DESCRIPTION =        

         (ADDRESS = (PROTOCOL = TCP)(HOST = PROD2)(PORT = 1521))

           (CONNECT_DATA = 
             (SERVER = DEDICATED)              
               (SERVICE_NAME = CATDB)           
            (SID = CATDB2)   
    )  
)
CATDBSTDBY =
    (DESCRIPTION =
        (ADDRESS = (PROTOCOL = TCP)(HOST = STDBY)(PORT = 1521))
         (CONNECT_DATA =
            (SERVER = DEDICATED)
              (SERVICE_NAME = CATDBSTDBY)
       )
  )
     

    • TAKE BACKUP OF THE PRODUCTION DATABASE.

    PROD1$export ORACLE_SID=CATDB1
    PROD1$rman target /

    Recovery Manager: Release 11.2.0.3.0 - Production on Tue Nov 18 11:12:24 2014

    Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.


    connected to target database: CATDB (not mounted)


    RMAN>
    run {
    allocate channel c1 type disk;
    allocate channel c2 type disk;
    allocate channel c3 type disk;
    allocate channel c4 type disk;
    allocate channel c5 type disk;
    allocate channel c6 type disk;
    allocate channel c7 type disk;
    allocate channel c8 type disk;
    allocate channel c9 type disk;
    allocate channel c10 type disk;
    backup as compressed backupset database format '/u03/backup/rman/CATDB/CATDB_Primary_databkp_standby_%U';
    backup as compressed backupset archivelog all format '/u03/backup/rman/CATDB/CATDB_Primary_archive_%U.arc';
    backup current controlfile for standby format '/u03/backup/rman/CATDB/CATDB_standbycontrol.ctl';
    }

    • MOVE THE BACKUP TO THE DISASTER RECOVERY SITE
    PROD1$cd /u03/backup/rman/CATDB
    PROD1$ls
    CATDB_Primary_databkp_standby_adpnto9u_1_1
    CATDB_Primary_databkp_standby_aepnto9v_1_1
    CATDB_Primary_databkp_standby_a8pnto9r_1_1
    CATDB_Primary_databkp_standby_afpnto9v_1_1
    CATDB_Primary_databkp_standby_a9pnto9s_1_1
    CATDB_Primary_databkp_standby_agpntoa0_1_1
    CATDB_Primary_databkp_standby_aapnto9s_1_1
    CATDB_Primary_databkp_standby_abpnto9t_1_1
    CATDB_Primary_databkp_standby_acpnto9t_1_1
    CATDB_Primary_archive_ahpntof2_1_1.arc
    CATDB_Primary_archive_ajpntof2_1_1.arc
    CATDB_Primary_archive_aipntof2_1_1.arc
    CATDB_Primary_archive_aopntof3_1_1.arc
    CATDB_Primary_archive_ampntof3_1_1.arc
    CATDB_Primary_archive_anpntof3_1_1.arc
    CATDB_Primary_archive_alpntof3_1_1.arc
    CATDB_Primary_archive_akpntof3_1_1.arc
    CATDB_Primary_archive_appntof3_1_1.arc
    CATDB_standbycontrol.ctl


    PROD1$scp * oracle@STDBY:$PWD
    • CHECK THAT ALL THE FILES ARRIVED ON THE INTENDED STANDBY SERVER
    STDBY$cd /u03/backup/rman/CATDB
    STDBY$ls
    CATDB_Primary_databkp_standby_adpnto9u_1_1
    CATDB_Primary_databkp_standby_aepnto9v_1_1
    CATDB_Primary_databkp_standby_a8pnto9r_1_1
    CATDB_Primary_databkp_standby_afpnto9v_1_1
    CATDB_Primary_databkp_standby_a9pnto9s_1_1
    CATDB_Primary_databkp_standby_agpntoa0_1_1
    CATDB_Primary_databkp_standby_aapnto9s_1_1
    CATDB_Primary_databkp_standby_abpnto9t_1_1
    CATDB_Primary_databkp_standby_acpnto9t_1_1
    CATDB_Primary_archive_ahpntof2_1_1.arc
    CATDB_Primary_archive_ajpntof2_1_1.arc
    CATDB_Primary_archive_aipntof2_1_1.arc
    CATDB_Primary_archive_aopntof3_1_1.arc
    CATDB_Primary_archive_ampntof3_1_1.arc
    CATDB_Primary_archive_anpntof3_1_1.arc
    CATDB_Primary_archive_alpntof3_1_1.arc
    CATDB_Primary_archive_akpntof3_1_1.arc
    CATDB_Primary_archive_appntof3_1_1.arc
    CATDB_standbycontrol.ctl

    • INITIATE THE RESTORE AND RECOVER PROCESS

    STDBY$rman target /

    Recovery Manager: Release 11.2.0.3.0 - Production on Tue Nov 18 11:12:51 2014

    Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.


    connected to target database: CATDB (not mounted)


    RMAN> set dbid=2344484010

    executing command: SET DBID

    RMAN> restore standby controlfile from '/u03/backup/rman/CATDB/CATDB_standbycontrol.ctl';

    Starting restore at 11/18/14 11:14:19
    using target database control file instead of recovery catalog
    allocated channel: ORA_DISK_1
    channel ORA_DISK_1: SID=3907 device type=DISK

    channel ORA_DISK_1: restoring control file

    channel ORA_DISK_1: restore complete, elapsed time: 00:00:03
    output file name=+DATA/catdbstdby/controlfile/control01.ctl
    output file name=+ARCHIVE/catdbstdby/controlfile/control02.ctl
    Finished restore at 11/18/14 11:14:24

    RMAN> sql 'alter database mount';

    sql statement: alter database mount
    released channel: ORA_DISK_1

    RMAN> run {
    2> allocate channel c1 type disk;
    3> allocate channel c2 type disk;
    4> allocate channel c3 type disk;
    5> allocate channel c4 type disk;
    6> allocate channel c5 type disk;
    7> allocate channel c6 type disk;
    8> allocate channel c7 type disk;
    9> allocate channel c8 type disk;
    10> allocate channel c9 type disk;
    11> allocate channel c10 type disk;
    12> restore database;
    13> }

    allocated channel: c1
    channel c1: SID=5167 device type=DISK

    allocated channel: c2

    channel c2: SID=5419 device type=DISK

    allocated channel: c3

    channel c3: SID=5545 device type=DISK

    allocated channel: c4

    channel c4: SID=5671 device type=DISK

    allocated channel: c5

    channel c5: SID=5797 device type=DISK

    allocated channel: c6

    channel c6: SID=5923 device type=DISK

    allocated channel: c7

    channel c7: SID=6049 device type=DISK

    allocated channel: c8

    channel c8: SID=6175 device type=DISK

    allocated channel: c9

    channel c9: SID=6301 device type=DISK

    allocated channel: c10

    channel c10: SID=6427 device type=DISK

    Starting restore at 11/18/14 11:15:33

    Starting implicit crosscheck backup at 11/18/14 11:15:33
    Crosschecked 18 objects
    Crosschecked 18 objects
    Finished implicit crosscheck backup at 11/18/14 11:15:39

    Starting implicit crosscheck copy at 11/18/14 11:15:39

    Crosschecked 2 objects
    Finished implicit crosscheck copy at 11/18/14 11:15:42

    searching for all files in the recovery area

    cataloging files...
    no files cataloged

    channel c1: starting datafile backup set restore

    channel c1: specifying datafile(s) to restore from backup set
    channel c1: restoring datafile 00001 to +REDO/catdb/datafile/system.260.798798557
    channel c1: restoring datafile 00007 to +DATA/catdbstdby/datafile/t24distindex.483.800907503
    channel c1: reading from backup piece /u03/backup/rman/CATDB/CATDB_Primary_databkp_standby_aapnto9s_1_1
    channel c2: starting datafile backup set restore
    channel c2: specifying datafile(s) to restore from backup set
    channel c2: restoring datafile 00002 to +REDO/catdb/datafile/sysaux.261.798798559
    channel c2: restoring datafile 00012 to +DATA/catdbstdby/datafile/t24distindex.286.800907661
    channel c2: reading from backup piece /u03/backup/rman/CATDB/CATDB_Primary_databkp_standby_aepnto9v_1_1
    channel c3: starting datafile backup set restore
    channel c3: specifying datafile(s) to restore from backup set
    channel c3: restoring datafile 00004 to +REDO/catdb/datafile/users.263.798798559
    channel c3: restoring datafile 00009 to +DATA/catdbstdby/datafile/t24distdata.346.800907611
    channel c3: reading from backup piece /u03/backup/rman/CATDB/CATDB_Primary_databkp_standby_adpnto9u_1_1
    channel c4: starting datafile backup set restore
    channel c4: specifying datafile(s) to restore from backup set
    channel c4: restoring datafile 00003 to +REDO/catdb/datafile/undotbs1.262.798798559
    channel c4: restoring datafile 00008 to +DATA/catdbstdby/datafile/t24distdata.479.800907597
    channel c4: reading from backup piece /u03/backup/rman/CATDB/CATDB_Primary_databkp_standby_abpnto9t_1_1
    channel c5: starting datafile backup set restore
    channel c5: specifying datafile(s) to restore from backup set
    channel c5: restoring datafile 00005 to +ARCHIVE/catdb/datafile/users.5407.800376881
    channel c5: restoring datafile 00010 to +DATA/catdbstdby/datafile/t24distdata.288.800907625
    channel c5: reading from backup piece /u03/backup/rman/CATDB/CATDB_Primary_databkp_standby_acpnto9t_1_1
    channel c6: starting datafile backup set restore
    channel c6: specifying datafile(s) to restore from backup set
    channel c6: restoring datafile 00006 to +DATA/catdbstdby/datafile/t24distdata.295.800907475
    channel c6: restoring datafile 00014 to +DATA/catdbstdby/datafile/undotbs2.285.831499529
    channel c6: reading from backup piece /u03/backup/rman/CATDB/CATDB_Primary_databkp_standby_a8pnto9r_1_1
    channel c7: starting datafile backup set restore
    channel c7: specifying datafile(s) to restore from backup set
    channel c7: restoring datafile 00011 to +DATA/catdbstdby/datafile/t24distdata.287.800907639
    channel c7: restoring datafile 00013 to +DATA/catdbstdby/datafile/t24distindex.358.800907675
    channel c7: reading from backup piece /u03/backup/rman/CATDB/CATDB_Primary_databkp_standby_a9pnto9s_1_1
    channel c2: piece handle=/u03/backup/rman/CATDB/CATDB_Primary_databkp_standby_aepnto9v_1_1 tag=TAG20141118T110010
    channel c2: restored backup piece 1
    channel c2: restore complete, elapsed time: 00:00:57
    channel c1: piece handle=/u03/backup/rman/CATDB/CATDB_Primary_databkp_standby_aapnto9s_1_1 tag=TAG20141118T110010
    channel c1: restored backup piece 1
    channel c1: restore complete, elapsed time: 00:01:18
    channel c3: piece handle=/u03/backup/rman/CATDB/CATDB_Primary_databkp_standby_adpnto9u_1_1 tag=TAG20141118T110010
    channel c3: restored backup piece 1
    channel c3: restore complete, elapsed time: 00:02:18
    channel c4: piece handle=/u03/backup/rman/CATDB/CATDB_Primary_databkp_standby_abpnto9t_1_1 tag=TAG20141118T110010
    channel c4: restored backup piece 1
    channel c4: restore complete, elapsed time: 00:02:28
    channel c5: piece handle=/u03/backup/rman/CATDB/CATDB_Primary_databkp_standby_acpnto9t_1_1 tag=TAG20141118T110010
    channel c5: restored backup piece 1
    channel c5: restore complete, elapsed time: 00:03:47
    channel c7: piece handle=/u03/backup/rman/CATDB/CATDB_Primary_databkp_standby_a9pnto9s_1_1 tag=TAG20141118T110010
    channel c7: restored backup piece 1
    channel c7: restore complete, elapsed time: 00:04:06
    channel c6: piece handle=/u03/backup/rman/CATDB/CATDB_Primary_databkp_standby_a8pnto9r_1_1 tag=TAG20141118T110010
    channel c6: restored backup piece 1
    channel c6: restore complete, elapsed time: 00:04:27
    Finished restore at 11/18/14 11:20:13
    released channel: c1
    released channel: c2
    released channel: c3
    released channel: c4
    released channel: c5
    released channel: c6
    released channel: c7
    released channel: c8
    released channel: c9
    released channel: c10

    RMAN> list backup of archivelog all;

    If the last sequence number listed is n, choose n+1 for complete recovery. In my case the last sequence number listed by the above command is 8291
    therefore 8292 is chosen for recovery.

    RMAN> recover database until sequence 8292;

    Starting recover at 11/18/14 11:22:47

    allocated channel: ORA_DISK_1
    channel ORA_DISK_1: SID=5167 device type=DISK

    starting media recovery


    channel ORA_DISK_1: starting archived log restore to default destination

    channel ORA_DISK_1: restoring archived log
    archived log thread=1 sequence=8291
    channel ORA_DISK_1: reading from backup piece /u03/backup/rman/CATDB/CATDB_Primary_archive_aopntof3_1_1.arc
    channel ORA_DISK_1: piece handle=/u03/backup/rman/CATDB/CATDB_Primary_archive_aopntof3_1_1.arc tag=TAG20141118T110258
    channel ORA_DISK_1: restored backup piece 1
    channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
    archived log file name=+ARCHIVE/catdbstdby/archivelog/2014_11_18/thread_1_seq_8291.2837.863954589 thread=1 sequence=8291
    channel ORA_DISK_1: starting archived log restore to default destination
    channel ORA_DISK_1: restoring archived log
    archived log thread=2 sequence=2686
    channel ORA_DISK_1: reading from backup piece /u03/backup/rman/CATDB/CATDB_Primary_archive_appntof3_1_1.arc
    channel ORA_DISK_1: piece handle=/u03/backup/rman/CATDB/CATDB_Primary_archive_appntof3_1_1.arc tag=TAG20141118T110258
    channel ORA_DISK_1: restored backup piece 1
    channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
    archived log file name=+ARCHIVE/catdbstdby/archivelog/2014_11_18/thread_2_seq_2686.3707.863954589 thread=2 sequence=2686
    channel default: deleting archived log(s)
    archived log file name=+ARCHIVE/catdbstdby/archivelog/2014_11_18/thread_1_seq_8291.2837.863954589 RECID=1 STAMP=863954588
    unable to find archived log
    archived log thread=1 sequence=8292
    Oracle Error:
    ORA-01547: warning: RECOVER succeeded but OPEN RESETLOGS would get error below
    ORA-01152: file 1 was not restored from a sufficiently old backup
    ORA-01110: data file 1: '+DATA/catdbstdby/datafile/system.1827.863954149'

    RMAN-00571: =======================================================

    RMAN-00569: ========= ERROR MESSAGE STACK FOLLOWS ===============
    RMAN-00571: ======================================================
    RMAN-03002: failure of recover command at 11/18/2014 11:23:11
    RMAN-06054: media recovery requesting unknown archived log for thread 1 with sequence 8292 and starting SCN of 22535896918

    RMAN> exit


    Recovery Manager complete.

    Since we have commanded oracle to recover from a sequence which is not included in the backup, the above error is expected.

    STDBY$sqlplus / as sysdba

    SQL*Plus: Release 11.2.0.3.0 Production on Tue Nov 18 11:24:01 2014

    Copyright (c) 1982, 2011, Oracle.  All rights reserved.



    Connected to:

    Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
    With the Partitioning, Automatic Storage Management, OLAP, Data Mining
    and Real Application Testing options

    SQL> select name,open_mode,database_role from v$database;

    NAME      OPEN_MODE            DATABASE_ROLE
    ---------      --------------------            ------------------------
    CATDB     MOUNTED               PHYSICAL STANDBY

    SQL> ALTER DATABASE RECOVER  managed standby database disconnect using current logfile nodelay noparallel ;

    Database altered.

    SQL>


    Check the alert log while you are making some logswitches from both primary instances, mrp process should apply the logfiles.

    To check the time gap between the primary and the standby you can use the following query on the standby


    SQL>select NAME,VALUE 
    from 
    v$dataguard_stats 
    where name = 'apply lag';
    NAME                                                             VALUE
    -------------------------                                       ----------------------------
    apply lag                                                      +00 00:06:34


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