Kamran Agayev's Oracle Blog

Oracle Certified Master

Archive for February, 2017

Step by Step Mastering Oracle Database Cloud Service – DBaaS – in one pdf now!

Posted by Kamran Agayev A. on 16th February 2017

Hello guys

After posting a few articles on DBaaS, I’ve decided to create a single pdf file and collect all my cloud related step by step practical blog posts in it. Click on the following image to download the pdf file and become Oracle DBaaS master! :) I will keep updating the pdf and hope it will be much easier fo you to get all articles in one shot!

 

Oracle DBaaS

Posted in Administration, Oracle Cloud | 2 Comments »

Performing disaster recovery with RMAN in Oracle Cloud using On-Premises backups stored in Oracle Public Cloud Storage

Posted by Kamran Agayev A. on 13th February 2017

In the previous blog posts you have seen how to create a disaster recovery for on-premises Oracle Database by creating a standby database in Oracle Cloud. Sometimes, you might not need to create a standby database, but just store the backup of your database in Oracle Cloud Storage and then use it to create a database in the cloud in the feature. In this blog post I will show you how to take backup of on-premises database to Oracle Cloud Storage and use it to perform a disaster recovery by restoring/recovering from backup to the instance in the cloud and perform recovery of on-premises database using backups stored in the cloud storage using RMAN.

First of all, we need to download and install a backup model to on-premises db. Open the following link and download Oracle Database Cloud Backup Module :

http://www.oracle.com/technetwork/database/availability/oracle-cloud-backup-2162729.html

 

Create folder to store wallets and lib file, extract the zip file and install it:

[oracle@ocm11g ~]$ mkdir wallet lib

[oracle@ocm11g tmp]$ java -jar opc_install.jar -serviceName Storage -identityDomain yourIdentityDomain -opcID YourOpcId -opcPass YourOpcPassword -walletDir /home/oracle/wallet -libDir /home/oracle/lib

Oracle Database Cloud Backup Module Install Tool, build 2016-10-07

Oracle Database Cloud Backup Module credentials are valid.

Oracle Database Cloud Backup Module wallet created in directory /home/oracle/wallet.

Oracle Database Cloud Backup Module initialization file /u03/oracle/product/11.2.4/db_1/dbs/opcPROD.ora created.

Downloading Oracle Database Cloud Backup Module Software Library from file opc_linux64.zip.

Downloaded 26528348 bytes in 12 seconds. Transfer rate was 2210695 bytes/second.

Download complete.

[oracle@ocm11g tmp]$

 

The name of on-premises database is PROD. Now connect to RMAN and change the following configurations. Configure the channel to use SBT library which enable to store backups to the cloud (libopc.so) and provide OPC_FILE destination that contains Oracle Backup Cloud Service container URL.

 

RMAN> CONFIGURE CHANNEL DEVICE TYPE ‘SBT_TAPE’ PARMS  ‘SBT_LIBRARY=/home/oracle/lib/libopc.so ENV=(OPC_PFILE=/u03/oracle/product/11.2.4/db_1/dbs/opcPROD.ora)’;

 

new RMAN configuration parameters:

CONFIGURE CHANNEL DEVICE TYPE ‘SBT_TAPE’ PARMS  ‘SBT_LIBRARY=/home/oracle/lib/libopc.so ENV=(OPC_PFILE=/u03/oracle/product/11.2.4/db_1/dbs/opcPROD.ora)’;

new RMAN configuration parameters are successfully stored

 

Enable autobackup of controlfile:

RMAN> CONFIGURE CONTROLFILE AUTOBACKUP ON;

 

new RMAN configuration parameters:

CONFIGURE CONTROLFILE AUTOBACKUP ON;

new RMAN configuration parameters are successfully stored

 

Set the high compression for backups to consume less space in the cloud storage:

RMAN> CONFIGURE COMPRESSION ALGORITHM ‘HIGH’;

 

new RMAN configuration parameters:

CONFIGURE COMPRESSION ALGORITHM ‘HIGH’ AS OF RELEASE ‘DEFAULT’ OPTIMIZE FOR LOAD TRUE;

new RMAN configuration parameters are successfully stored

 

Change the default channel to tape (media -> Oracle Cloud Backup Storage)

RMAN> CONFIGURE DEFAULT DEVICE TYPE TO ‘SBT_TAPE’;

 

new RMAN configuration parameters:

CONFIGURE DEFAULT DEVICE TYPE TO ‘SBT_TAPE’;

new RMAN configuration parameters are successfully stored

RMAN>

 

Now connect to RMAN and run SHOW ALL command to see the backup configurations:

[oracle@ocm11g ~]$ rman target /

 

RMAN> show all;

using target database control file instead of recovery catalog

RMAN configuration parameters for database with db_unique_name PROD are:

CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default

CONFIGURE BACKUP OPTIMIZATION OFF; # default

CONFIGURE DEFAULT DEVICE TYPE TO ‘SBT_TAPE’;

CONFIGURE CONTROLFILE AUTOBACKUP ON;

CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE SBT_TAPE TO ‘%F’; # default

CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO ‘%F’; # default

CONFIGURE DEVICE TYPE SBT_TAPE PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default

CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default

CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE SBT_TAPE TO 1; # default

CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default

CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE SBT_TAPE TO 1; # default

CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default

CONFIGURE CHANNEL DEVICE TYPE ‘SBT_TAPE’ PARMS  ‘SBT_LIBRARY=/home/oracle/lib/libopc.so ENV=(OPC_PFILE=/u03/oracle/product/11.2.4/db_1/dbs/opcPROD.ora)’;

CONFIGURE MAXSETSIZE TO UNLIMITED; # default

CONFIGURE ENCRYPTION FOR DATABASE OFF; # default

CONFIGURE ENCRYPTION ALGORITHM ‘AES128’; # default

CONFIGURE COMPRESSION ALGORITHM ‘HIGH’ AS OF RELEASE ‘DEFAULT’ OPTIMIZE FOR LOAD TRUE;

CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default

CONFIGURE SNAPSHOT CONTROLFILE NAME TO ‘/u03/oracle/product/11.2.4/db_1/dbs/snapcf_PROD.f’; # default

 

Before taking the backup, create a table at on-premises database. We will query it after disaster recovery in the cloud db.

 

SQL> create table mytable as select * from dba_objects where rownum<=100;

Table created.

 

SQL> select count(1) from mytable;

  COUNT(1)

———-

       100

 

SQL>

 

Now enable encryption (set the password for backups) and take backup of the database:

 

RMAN> set encryption on identified by “mypass” only;

executing command: SET encryption

 

RMAN> backup database plus archivelog;

Starting backup at 10-FEB-17

current log archived

allocated channel: ORA_SBT_TAPE_1

channel ORA_SBT_TAPE_1: SID=33 device type=SBT_TAPE

channel ORA_SBT_TAPE_1: Oracle Database Backup Service Library VER=3.16.9.21

channel ORA_SBT_TAPE_1: starting archived log backup set

channel ORA_SBT_TAPE_1: specifying archived log(s) in backup set

input archived log thread=1 sequence=48 RECID=71 STAMP=935603816

channel ORA_SBT_TAPE_1: starting piece 1 at 10-FEB-17

channel ORA_SBT_TAPE_1: finished piece 1 at 10-FEB-17

piece handle=17rs8bjd_1_1 tag=TAG20170210T175700 comment=API Version 2.0,MMS Version 3.16.9.21

channel ORA_SBT_TAPE_1: backup set complete, elapsed time: 00:00:25

Finished backup at 10-FEB-17

 

Starting backup at 10-FEB-17

using channel ORA_SBT_TAPE_1

channel ORA_SBT_TAPE_1: starting full datafile backup set

channel ORA_SBT_TAPE_1: specifying datafile(s) in backup set

input datafile file number=00001 name=/u03/oracle/oradata/PROD/system01.dbf

input datafile file number=00002 name=/u03/oracle/oradata/PROD/sysaux01.dbf

input datafile file number=00003 name=/u03/oracle/oradata/PROD/undotbs01.dbf

input datafile file number=00004 name=/u03/oracle/oradata/PROD/users01.dbf

channel ORA_SBT_TAPE_1: starting piece 1 at 10-FEB-17

channel ORA_SBT_TAPE_1: finished piece 1 at 10-FEB-17

piece handle=18rs8bk6_1_1 tag=TAG20170210T175726 comment=API Version 2.0,MMS Version 3.16.9.21

channel ORA_SBT_TAPE_1: backup set complete, elapsed time: 02:57:07

Finished backup at 10-FEB-17

 

Starting backup at 10-FEB-17

current log archived

using channel ORA_SBT_TAPE_1

channel ORA_SBT_TAPE_1: starting archived log backup set

channel ORA_SBT_TAPE_1: specifying archived log(s) in backup set

input archived log thread=1 sequence=49 RECID=72 STAMP=935605482

input archived log thread=1 sequence=50 RECID=73 STAMP=935614475

channel ORA_SBT_TAPE_1: starting piece 1 at 10-FEB-17

channel ORA_SBT_TAPE_1: finished piece 1 at 10-FEB-17

piece handle=1ars8m0c_1_1 tag=TAG20170210T205435 comment=API Version 2.0,MMS Version 3.16.9.21

channel ORA_SBT_TAPE_1: backup set complete, elapsed time: 00:09:25

Finished backup at 10-FEB-17

 

Starting Control File and SPFILE Autobackup at 10-FEB-17

piece handle=c-345613202-20170210-02 comment=API Version 2.0,MMS Version 3.16.9.21

Finished Control File and SPFILE Autobackup at 10-FEB-17

 

RMAN>

 

The backup command completed successfully and all backups are stored in Oracle Cloud Backup Storage.

 

Now let’s perform a disaster recovery in the cloud machine. Create a new cloud database instance, configure SSH connection from on-premises to the cloud host. Copy opc_install.zip file you have downloaded from OTN to the cloud host and install it as you did it at on-premises host. Drop the database if there’s any, connect to RMAN and start it in NOMOUNT mode. Provide the RMAN password, allocate a channel as you did at on-premises database and restore the spfile:

 

RMAN> STARTUP NOMOUNT;

RMAN> set decryption identified by “mypass”;

 

executing command: SET decryption

using target database control file instead of recovery catalog

 

RMAN> run

2> {

3> allocate channel t1 type ‘SBT_TAPE’ PARMS  ‘SBT_LIBRARY=/home/oracle/lib/libopc.so ENV=(OPC_PFILE=/u01/app/oracle/product/11.2.0/dbhome_1/dbs/opcPROD.ora)’;

4> set dbid=345613202;

5> restore spfile to pfile ‘/tmp/pfile.ora’ from autobackup;

6> }

 

allocated channel: t1

channel t1: SID=171 device type=SBT_TAPE

channel t1: Oracle Database Backup Service Library VER=3.16.9.21

 

executing command: SET DBID

 

Starting restore at 11-FEB-17

 

channel t1: looking for AUTOBACKUP on day: 20170211

channel t1: looking for AUTOBACKUP on day: 20170210

channel t1: AUTOBACKUP found: c-345613202-20170210-02

channel t1: restoring spfile from AUTOBACKUP c-345613202-20170210-02

channel t1: SPFILE restore from AUTOBACKUP complete

Finished restore at 11-FEB-17

released channel: t1

 

RMAN>

 

Server parameter file is restored. If you need to specify different location for some parameters, create a readable parameter file from it, make your changes, create a server parameter file from it and start the database in NOMOUNT mode using the restored (and modified) spfile.

SQL> startup nomount force;

ORACLE instance started.

 

Total System Global Area 1235959808 bytes

Fixed Size                  2252784 bytes

Variable Size             385875984 bytes

Database Buffers          838860800 bytes

Redo Buffers                8970240 bytes

SQL> exit

 

 

Now restore controlfile from autobackup:

RMAN> set decryption identified by “mypass”;

 

executing command: SET decryption

 

RMAN> run

2> {

3> allocate channel t1 type ‘SBT_TAPE’ PARMS  ‘SBT_LIBRARY=/home/oracle/lib/libopc.so ENV=(OPC_PFILE=/u01/app/oracle/product/11.2.0/dbhome_1/dbs/opcPROD.ora)’;

4> set dbid=345613202;

5> restore controlfile from autobackup;

6> }

 

allocated channel: t1

channel t1: SID=134 device type=SBT_TAPE

channel t1: Oracle Database Backup Service Library VER=3.16.9.21

 

executing command: SET DBID

 

Starting restore at 11-FEB-17

 

channel t1: looking for AUTOBACKUP on day: 20170211

channel t1: looking for AUTOBACKUP on day: 20170210

channel t1: AUTOBACKUP found: c-345613202-20170210-02

channel t1: restoring control file from AUTOBACKUP c-345613202-20170210-02

channel t1: control file restore from AUTOBACKUP complete

output file name=/u04/app/oracle/oradata/control01.ctl

output file name=/u04/app/oracle/oradata/control02.ctl

Finished restore at 11-FEB-17

released channel: t1

 

RMAN>

 

Controlfile are restored. Start the database in MOUNT mode and restore the datafiles. Specify a new folder using SET NEWNAME FOR DATABASE TO command as follows:

RMAN> run

2> {

3> allocate channel t1 type ‘SBT_TAPE’ PARMS  ‘SBT_LIBRARY=/home/oracle/lib/libopc.so ENV=(OPC_PFILE=/u01/app/oracle/product/11.2.0/dbhome_1/dbs/opcPROD.ora)’;

4> set newname for database to ‘/u04/app/oracle/oradata/%U.dbf’;

5> restore database;

6> switch datafile all;

7> }

 

allocated channel: t1

channel t1: SID=133 device type=SBT_TAPE

channel t1: Oracle Database Backup Service Library VER=3.16.9.21

 

executing command: SET NEWNAME

 

Starting restore at 11-FEB-17

Starting implicit crosscheck backup at 11-FEB-17

Crosschecked 1 objects

Finished implicit crosscheck backup at 11-FEB-17

 

Starting implicit crosscheck copy at 11-FEB-17

Crosschecked 2 objects

Finished implicit crosscheck copy at 11-FEB-17

 

searching for all files in the recovery area

cataloging files…

no files cataloged

 

 

channel t1: starting datafile backup set restore

channel t1: specifying datafile(s) to restore from backup set

channel t1: restoring datafile 00001 to /u04/app/oracle/oradata/data_D-PROD_TS-SYSTEM_FNO-1.dbf

channel t1: restoring datafile 00002 to /u04/app/oracle/oradata/data_D-PROD_TS-SYSAUX_FNO-2.dbf

channel t1: restoring datafile 00003 to /u04/app/oracle/oradata/data_D-PROD_TS-UNDOTBS1_FNO-3.dbf

channel t1: restoring datafile 00004 to /u04/app/oracle/oradata/data_D-PROD_TS-USERS_FNO-4.dbf

channel t1: reading from backup piece 18rs8bk6_1_1

channel t1: piece handle=18rs8bk6_1_1 tag=TAG20170210T175726

channel t1: restored backup piece 1

channel t1: restore complete, elapsed time: 00:00:45

Finished restore at 11-FEB-17

 

datafile 1 switched to datafile copy

input datafile copy RECID=14 STAMP=935693831 file name=/u04/app/oracle/oradata/data_D-PROD_TS-SYSTEM_FNO-1.dbf

datafile 2 switched to datafile copy

input datafile copy RECID=15 STAMP=935693831 file name=/u04/app/oracle/oradata/data_D-PROD_TS-SYSAUX_FNO-2.dbf

datafile 3 switched to datafile copy

input datafile copy RECID=16 STAMP=935693831 file name=/u04/app/oracle/oradata/data_D-PROD_TS-UNDOTBS1_FNO-3.dbf

datafile 4 switched to datafile copy

input datafile copy RECID=17 STAMP=935693831 file name=/u04/app/oracle/oradata/data_D-PROD_TS-USERS_FNO-4.dbf

released channel: t1

 

RMAN>

 

Now run ALTER DATABASE RENAME FILE command to rename redo log files:

SQL> alter database rename file ‘/u03/oracle/oradata/PROD/redo03.log’ to ‘/u04/app/oracle/oradata/redo03.log’;

Database altered.

 

SQL> alter database rename file ‘/u03/oracle/oradata/PROD/redo02.log’ to ‘/u04/app/oracle/oradata/redo02.log’;

Database altered.

 

SQL> alter database rename file ‘/u03/oracle/oradata/PROD/redo01.log’ to ‘/u04/app/oracle/oradata/redo01.log’;

Database altered.

 

SQL>

 

Now run RECOVER DATABASE command to recover the database and open the database:

 

RMAN> set decryption identified by “mypass”;

 

executing command: SET decryption

 

RMAN> run

2> {

3> allocate channel t1 type ‘SBT_TAPE’ PARMS  ‘SBT_LIBRARY=/home/oracle/lib/libopc.so ENV=(OPC_PFILE=/u01/app/oracle/product/11.2.0/dbhome_1/dbs/opcPROD.ora)’;

4> recover database;

5> }

 

allocated channel: t1

channel t1: SID=125 device type=SBT_TAPE

channel t1: Oracle Database Backup Service Library VER=3.16.9.21

 

Starting recover at 11-FEB-17

 

starting media recovery

 

channel t1: starting archived log restore to default destination

channel t1: restoring archived log

archived log thread=1 sequence=49

channel t1: restoring archived log

archived log thread=1 sequence=50

channel t1: reading from backup piece 1ars8m0c_1_1

channel t1: piece handle=1ars8m0c_1_1 tag=TAG20170210T205435

channel t1: restored backup piece 1

channel t1: restore complete, elapsed time: 00:00:07

archived log file name=/u03/app/oracle/fast_recovery_area/PROD/archivelog/2017_02_11/o1_mf_1_49_d9yqs878_.arc thread=1 sequence=49

channel default: deleting archived log(s)

archived log file name=/u03/app/oracle/fast_recovery_area/PROD/archivelog/2017_02_11/o1_mf_1_49_d9yqs878_.arc RECID=75 STAMP=935693995

archived log file name=/u03/app/oracle/fast_recovery_area/PROD/archivelog/2017_02_11/o1_mf_1_50_d9yqs8cn_.arc thread=1 sequence=50

channel default: deleting archived log(s)

archived log file name=/u03/app/oracle/fast_recovery_area/PROD/archivelog/2017_02_11/o1_mf_1_50_d9yqs8cn_.arc RECID=74 STAMP=935693994

unable to find archived log

archived log thread=1 sequence=51

released channel: t1

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

RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============

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

RMAN-03002: failure of recover command at 02/11/2017 19:00:00

RMAN-06054: media recovery requesting unknown archived log for thread 1 with sequence 51 and starting SCN of 1153764

 

RMAN> alter database open resetlogs;

database opened

 

RMAN>

 

Connect to SQL*Plus and query the table you have created before taking a backup at on-premises database:

SQL> select count(1) from mytable;

 

  COUNT(1)

———-

       100

 

SQL>

 

Great! We have successfully performed a disaster recovery of on-premises database to the cloud using RMAN backups stored in Oracle Cloud Storage!

Now let’s use backups stored in the cloud to perform a recovery to on-premises database. Let’s create a new table, take backup of the datafile, corrupt a block of the datafile and recover it from backups stored in the cloud.

 

SQL> create table test_table tablespace users as select * from dba_objects where rownum<=10;

Table created.

 

RMAN> set encryption on identified by “mypass” only;

executing command: SET encryption

 

RMAN> backup datafile 4;               

 

Starting backup at 11-FEB-17

using channel ORA_SBT_TAPE_1

channel ORA_SBT_TAPE_1: starting full datafile backup set

channel ORA_SBT_TAPE_1: specifying datafile(s) in backup set

input datafile file number=00004 name=/u03/oracle/oradata/PROD/users01.dbf

channel ORA_SBT_TAPE_1: starting piece 1 at 11-FEB-17

channel ORA_SBT_TAPE_1: finished piece 1 at 11-FEB-17

piece handle=1drsaim0_1_1 tag=TAG20170211T141008 comment=API Version 2.0,MMS Version 3.16.9.21

channel ORA_SBT_TAPE_1: backup set complete, elapsed time: 00:00:45

Finished backup at 11-FEB-17

 

Starting Control File and SPFILE Autobackup at 11-FEB-17

piece handle=c-345613202-20170211-00 comment=API Version 2.0,MMS Version 3.16.9.21

Finished Control File and SPFILE Autobackup at 11-FEB-17

RMAN> exit

 

SQL> SELECT header_block FROM dba_segments WHERE segment_name=’TEST_TABLE’;

HEADER_BLOCK

————

                 170

 

SQL>

 

[oracle@ocm11g ~]$ dd of=/u03/oracle/oradata/PROD/users01.dbf bs=8192 conv=notrunc seek=170 <<EOF

> Corruption

> Corruption

> EOF

0+1 records in

0+1 records out

23 bytes (23 B) copied, 0.000147784 s, 156 kB/s

[oracle@ocm11g ~]$ sqlplus / as sysdba

 

SQL> alter system flush buffer_cache;

System altered.

 

SQL> select count(1) from test_table;

select count(1) from test_table

                     *

ERROR at line 1:

ORA-01578: ORACLE data block corrupted (file # 4, block # 170)

ORA-01110: data file 4: ‘/u03/oracle/oradata/PROD/users01.dbf’

 

SQL> select * from v$database_block_corruption;

     FILE#     BLOCK#             BLOCKS CORRUPTION_CHANGE# CORRUPTIO

———- ———- ———- —————— ———

                 4               170              1                         0 CORRUPT

 

 

Ok, we have a corrupted block. Now connect to RMAN and recover it:

 

RMAN> recover datafile 4 block 170;

 

Starting recover at 11-FEB-17

using channel ORA_SBT_TAPE_1

using channel ORA_DISK_1

 

channel ORA_SBT_TAPE_1: restoring block(s)

channel ORA_SBT_TAPE_1: specifying block(s) to restore from backup set

restoring blocks of datafile 00004

channel ORA_SBT_TAPE_1: reading from backup piece 1drsaim0_1_1

channel ORA_SBT_TAPE_1: piece handle=1drsaim0_1_1 tag=TAG20170211T141008

channel ORA_SBT_TAPE_1: restored block(s) from backup piece 1

channel ORA_SBT_TAPE_1: block restore complete, elapsed time: 00:00:15

 

starting media recovery

media recovery complete, elapsed time: 00:00:01

 

Finished recover at 11-FEB-17

 

RMAN> exit

 

[oracle@ocm11g ~]$ sqlplus / as sysdba

SQL> select count(1) from test_table;

 

  COUNT(1)

———-

                10

 

SQL>

 

As you see, we used backups stored in Oracle Cloud Storage to recover a corrupted block of on-premises database.

Posted in Oracle Cloud | No Comments »