twp-oracledatabasebackupservice-2183633

1
An Oracle White Paper
January 2015
Oracle Database Backup Service –
A Technical White Paper

2
WHY
STORE
BACKUPS
IN
THE
CLOUD?
4

ORACLE
DATABASE
BACKUP
SERVICE
OVERVIEW
4

ORACLE
DATABASE
CLOUD
BACKUP
MODULE
(ODCBM)
5

COMPLETE
DATA
SECURITY
5

COMPRESSED
BACKUPS
FOR
BETTER
PERFORMANCE
5

SUPPORT
MATRIX
6

BENEFITS
OF
ORACLE
DATABASE
BACKUP
SERVICE
6

GETTING
STARTED
WITH
THE
ODBS
7

1.
SIGN
UP
FOR
ORACLE
DATABASE
BACKUP
SERVICE
&
PURCHASE
CAPACITY.
7

2.
REGISTER
FOR
ORACLE
TECHNOLOGY
NETWORK
(OTN)
ACCOUNT
8

3.
INSTALL
THE
ORACLE
DATABASE
CLOUD
BACKUP
MODULE
9

4.
EXECUTE
THE
INSTALLER
10

5.
CONFIGURE
RECOVERY
MANAGER
(RMAN)
SETTINGS
10

6.
CONFIGURE
ENCRYPTION
11

7.
PERFORM
BACKUPS
11

8.
RESTORE
&
RECOVERY
12

CLOUD
BACKUP
BEST
PRACTICES
12

END-‐TO-‐END
DATA
SECURITY
12

PROTECTION
OF
THE
ENCRYPTION
KEY
12

OPTIMIZING
CLOUD
BACKUP
PERFORMANCE
12

CONCLUSION
13

APPENDIX
14

CONFIGURATION
FILES
14

EXAMPLE
TEST
RUN
15

USING
PASSWORD
ENCRYPTION
16

USING
TRANSPARENT
DATA
ENCRYPTION
16

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Introduction
Cloud Computing allows users to tap into a virtually unlimited pool of computing and storage
resources over the Internet. Cloud users benefit from utility-like costs, scalability, and reliability,
as well as the ability to self-provision resources dynamically and pay only for what they use.
Enterprises deploy multi-tiered storage architectures to store their production data and
backups to reduce the overall capital and operating expenses for their storage infrastructure.
They also store their data in an offsite location for disaster recovery purposes. They prefer to
store their backup data in a location which is offsite, but at the same time immediately
accessible. For long term archives, and backups, they utilize tape vaulting and store tapes in
an offsite location. Many small and medium businesses that do not have a tape infrastructure
have to deploy some form of virtual tape or disks for storing backups and archives. Cloud
based storage offers a great alternate to tape with no upfront capital cost, no storage
management, on-demand increase of capacity, and a pay-per-use model.
Oracle Database Backup Service (ODBS) is a new backup-as-a-service offering that enables
customers to store their backups securely in the Oracle cloud. ODBS provides a transparent,
scalable, efficient, and elastic cloud storage platform for Oracle database backups. The Client
side Oracle Database Cloud Backup Module which is used with Recovery Manager (RMAN)
transparently handles the backup and restore operations. Unlike traditional tape-based offsite
storage, Cloud backups are immediately accessible whenever a restore is required.
Purpose of this document is to provide an overview of Oracle Database Backup Service. For
detailed documentation, refer to https://docs.oracle.com/cloud/latest/dbbackup_gs/.

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Why Store Backups in the Cloud?
Good Disaster Recovery (DR) practice requires keeping usable business-critical backups offsite.
Organizations have traditionally implemented this by writing backups to tape and shipping the tapes to
be stored offsite. This is costly and operationally complex, requiring hardware, personnel, and sound
procedures to ensure that the offsite backups are up-to-date, secure, and able to be recalled and used in
the face of disaster. While shipping and secure storage are often outsourced, the IT organization of the
enterprise retains the burden of ensuring the integrity of the backups and procedures.
The pricing and operational characteristics of Cloud Storage make it a very compelling alternative to
shipping tapes offsite. Cloud storage offers pay-as-you-go, elastic self-provisioning, with low prices per
unit storage per unit time, making costs easy to predict, control, and map to the workloads of an
organization’s IT assets. Good Cloud infrastructure offers storage redundancy, security, availability and
scalability with geographic distribution that enables it to absorb a broad range of adverse events
without loss of availability. These characteristics make it an excellent alternative to writing, shipping
and storing tapes in a secure location. Last, but not least, backups are created and updated over the
network, with minimal or no operator involvement – drastically simplifying operational procedures.
Cloud services for storing backups offer business benefits in terms of elasticity in capacity and
operational expenses. It can also simplify your own infrastructure as you no longer need to provide and
manage storage (e.g., tapes that need to be rotated, shipped away, etc.).
Oracle Database Backup Service Overview
ODBS is the cloud storage solution for storing backups of on-premise Oracle databases. It is an object
storage platform that provides elastic on-demand storage capability. Cloud object management and
data transfer complexities are completely transparent to the DBAs and backup administrators as the
backups and restores between the cloud and the on-site databases are handled by the database backup
module.
Figure 1. Oracle Database Backup Service
Refer to the Oracle Public Cloud documentation at http://docs.oracle.com/cloud for more details.

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Oracle Database Cloud Backup Module (ODCBM)
ODCBM is the cloud backup module that is installed in the database server. During the install process,
a platform specific backup module is downloaded and installed. The RMAN environment of the client
database is configured to use the cloud backup module to perform backups to ODBS. Using familiar
RMAN commands, backups and restores are transparently handled by the backup module.
Figure 2. Data Flow for the Client Module
Encrypted and compressed RMAN backup data are transmitted to ODBS using SSL.
Complete Data Security
Data security and privacy is particularly important in shared, publicly accessible environments such as
Storage Clouds. Accordingly, ODCBM enforces mandatory RMAN encryption of the backup data. . If
the backup data is not encrypted, users get an error message and the data is not backed up. RMAN
encryption of the backup data before it leaves the database server reduces the risk of theft or
unauthorized access of the data - as the backup data remains encrypted at the source, in transit, and at
rest in the Cloud. RMAN encryptions to backup to ODBS do not require licensing Advanced Security
Option.
Compressed Backups for Better Performance
RMAN backups to ODBS will skip unused and null blocks of the databases. These backups can be
further reduced in size by choosing from RMAN’s rich compression capabilities. When transmitting
backups over low-bandwidth networks, such as the public internet, any reduction in backup size is
directly realized as an increase in backup performance. RMAN compressions to backup to ODBS do
not require licensing Advanced Compression Option.

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Support Matrix
The Oracle Database Backup Service support matrix:
Oracle Database1 10gR2, 11g, 12c (EE, SE, SE1)
Operating Systems (64bits) Linux, Solaris x86-64, SPARC, Windows, AIX, HP-UX, zLinux
RMAN Compression2 HIGH, MEDIUM, BASIC, LOW
RMAN Encryption Password, TDE, Dual-mode
Benefits of Oracle Database Backup Service
Oracle Database Backup Service’s functionality provides numerous advantages compared to other
offsite storage practices.
• Continuous Accessibility: Backups stored in ODBS are always accessible – much in the same way
local disk backups are. For restores, there is no need to call anyone and no need to ship or load the
tapes. Administrators can initiate restore operations using their standard tools (Enterprise Manager,
RMAN scripts, etc.) just as if the offsite backup was stored locally. This make restores faster and
reduce down time from days to hours/minutes compared to cases where tapes must be retrieved
from the offsite storage location.
• High Reliability: Storage Clouds are disk based. ODBS stores data redundantly across multiple
storage nodes for availability and scalability purposes.
• Unlimited Scaling and No Up-front Capital Expense: ODBS provides virtually unlimited
capacity with no up-front capital expenditure. Consequently, users need not worry about
provisioning adequate tapes or local storage to hold the required backup data.
• Easy Provisioning of Test and Dev Environments: As Cloud Backups are accessible from
anywhere via the Internet, the backups can be used to quickly clone databases to create custom test,
development, or QA environments.
1 Standard Editions require a patch for the bug 18339044 (Refer to My Oracle Support Doc ID 1640149.1)
2 Availability of the compression options depend on the Database version.

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Getting Started with the ODBS
This section explains the overall process to purchase ODBS storage capacity, and how to download
and configure the Oracle Cloud Backup Module to use with your Oracle Database. For more details,
please refer to http://docs.oracle.com/cloud and also the Oracle Database RMAN documentation.
Figure 2 shows the overall flow of operations.
Figure 2. Data Flow for the Client Module
This section outlines the steps involved in the overall ODBS setup
1. Sign up for Oracle Database Backup Service & Purchase capacity.
From the Oracle Store (or) via ODBS portal, purchase storage capacity in 1TB blocks either on a
month-to-month basis or for longer term. The email provided for creating the account will be the
UserID.

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After the purchase process, you will receive an email with the procedure to sign up for the account.
During the sign-up process, you can choose the Identity domain, Service Name, and Password. An
example screen shot is provided below:
Refer to http//docs.oracle.com/cloud for the latest and detailed subscription procedure.
2. Register for Oracle Technology Network (OTN) Account
An Oracle.com or OTN account is required to install the Oracle Database Cloud Backup module. New
accounts may be created by visiting the OTN website (http://otn.oracle.com) for free.

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3. Install the Oracle Database Cloud Backup Module
Go to the OTN page for downloading the ODCBM installer.
Unzip the installer. It contains opc_install.jar and a README file. Proceed to install the Oracle
Database Cloud Backup Module by executing the installer jar file.
In this section, the following example location & parameter information are used.
Description Location / Value
Oracle Database Backup Service Related
ODBS – Account ID myaccount@mycompany.com
ODBS - Password myPassword
ODBS – Identity Domain myDomain
ODBS – Service Name myService
Local wallet location to store ODBS
credentials (-walletDir)
/home/oracle/OPC/wallet
Local Database Related
ORACLE_BASE /orclbase

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ORACLE_HOME /orclhome
ORACLE_SID mySID
-libDir /home/oracle/OPC/lib
Oracle Wallet for RMAN encryption
(optional)
$ORACLE_BASE/admin/$ORACLE_SID/wallet
4. Execute the installer
The install tool then is invoked as shown in the following example:
$ java -jar opc_install.jar -serviceName myService -identityDomain myDomain
-opcId myaccount@mycompany.com -opcPass myPassword -walletDir
/home/oracle/OPC/wallet -libDir /home/oracle/OPC/lib
Oracle Database Cloud Backup Module Install Tool, build 2014-03-13
Oracle Database Cloud Backup Module credentials are valid.
Oracle Database Cloud Backup Module wallet created in directory
/home/oracle/OPC/wallet.
Oracle Database Cloud Backup Module initialization file
/orclhome/dbs/opcmySID.ora created.
Downloading Oracle Database Cloud Backup Module Software Library from file
opc_linux64.zip.
Downloaded 13165919 bytes in 204 seconds. Transfer rate was 64538
bytes/second.
Download complete.
Extracted file /home/oracle/OPC/lib/libopc.so
Example 1: Running the Cloud Backup Install Tool
Example 1 above shows how the tool automatically downloads the platform specific cloud backup
module, creates an Oracle Wallet to securely store the user’s ODBS credentials, and creates the Cloud
backup configuration file. Please refer to the accompanying README for further details.
5. Configure Recovery Manager (RMAN) Settings
During the installation process, the installer creates a configuration file named opc<SID>.ora in the
$ORACLE_HOME/dbs directory. This file contains the ODBS URL to which the backup will be
performed and the location of the wallet which holds the ODCBM credentials.
Using RMAN, configure the SBT device to use the ODBS (SBT) library.
RMAN> configure channel device type sbt parms
'SBT_LIBRARY=/orclhome/lib/libopc.so

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ENV=(OPC_PFILE=/orclhome/dbs/opcmySID.ora)';
using target database control file instead of recovery catalog
new RMAN configuration parameters:
CONFIGURE CHANNEL DEVICE TYPE 'SBT_TAPE' PARMS
'SBT_LIBRARY=/orclhome/lib/libopc.so
SBT_PARMS=(OPC_PFILE=/orclhome/dbs/opcmySID.ora)';
new RMAN configuration parameters are successfully stored
Example 2: Configuring RMAN
Once the RMAN configuration is complete, backups to the cloud can be performed. You can use the
same RMAN commands that you regularly use for tape backups. No new commands are required for
using ODCBM.
6. Configure Encryption
ODCBM enforces RMAN backup encryption and will not permit unencrypted backups to be sent to
the Oracle Database Backup Service. If the backup is not encrypted, an error message similar to the
one shown below is returned.
RMAN-03009: failure of backup command on ORA_SBT_TAPE_1 channel at
02/14/2014 14:00:43
ORA-27030: skgfwrt: sbtwrite2 returned error
ORA-19511: non RMAN, but media manager or vendor specific failure,
error text:
KBHS-01602: backup piece 14p0jso8_1_1 is not encrypted
RMAN encrypted backups are securely created, transmitted, and stored in the cloud. Please refer to
the Oracle documentation for more details on the various RMAN encryption methodologies, and
choosing from various encryption algorithms (such as AES128 or AES256). Refer to the Appendix for
examples:
If no Oracle wallet has been configured, you can still perform encrypted backups using password based
encryption.
RMAN> set encryption on identified by "myPassword" only;
Likewise, you have to specify the same password before you perform a restore operation.
RMAN> set decryption identified by “myPassword” only;
7. Perform backups
RMAN supports binary compression of backups. For backing up to ODBS, you can choose from
HIGH, MEDIUM, BASIC, or LOW algorithms. Refer to the Oracle documentation to understand
these options to properly choose the algorithm that best fits your needs.
As an example,
RMAN> configure compression algorithm ‘MEDIUM’;

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RMAN> backup as compressed backupset database plus
archivelog;
• Refer to the OTN document “Advanced Compression with Oracle 11g”.
• Refer to the OTN page “Encrypt Database Backups” for details on using the encryption and
compression options together.
Refer to My Oracle Support Doc ID 1640149.1 – Oracle Database Backup Service FAQ at
http://support.oracle.com for more details.
8. Restore & Recovery
Depending on the type of fault and the recovery needed, either the entire database or specific
tablespaces or data files are to be restored and recovered. Similarly, this cloud module also supports the
new capability in Oracle Database 12c to perform Table level recovery using RMAN. If password
based encryption was used during the backup, you must provide the same password during the restore.
Likewise, if TDE mode of backup was performed, then the same encryption key is required during
restore.
All the restore and recovery operations are performed via the RMAN interface.
Cloud Backup Best Practices
End-to-End Data Security
ODCBM enforces that backups are encrypted before being transmitted to the cloud. Encrypting
backups ensures that your data is secured at the source, transmitted securely over SSL, and protected
against unauthorized access in the cloud. Encryption can also be enabled while scheduling backups in
Enterprise Manager.
Protection of the Encryption Key
The Oracle wallet or the password used during the backups need to be safe-guarded. That information
is required at the time of restore. Please refer to the OTN page for more details.
Optimizing Cloud Backup Performance
As Cloud Backups are sent over the public Internet, the backup performance depends on the WAN
network bandwidth. However, by using the right combination of RMAN parallelism and compression,
much higher effective backup rates can be attained.
• Due to public Internet network (WAN) bandwidth constraints, backups to cloud can take
significantly longer compared to backups over LAN.
• Compression helps overcome the network bandwidth limitations. Effective backup rate can
be increased multiple times if compression is used.

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• Using parallel streams (RMAN channels) also speeds up Cloud backups.
The following best practices are recommended to optimize the performance of Cloud Backups:
• Use multiple RMAN channels for higher parallelism resulting in full utilization of the network.
• Use multi-section backups. Oracle Database versions 11g and above allows multiple channels
to back up a single file in parallel, increasing parallelism beyond the number of datafiles to be
backed up. For example, the RMAN command to specify backup section size 1 GB is:
BACKUP DEVICE TYPE SBT DATABASE SECTION SIZE 1g;
• Use the compression algorithms available with the Oracle Database 11g Advanced
Compression Option, since these algorithms are usually faster than the default RMAN BASIC
compression. Oracle recommends using MEDIUM compression for cloud backups.
• Use a weekly full and daily incremental backup strategy. This will result in faster backups and
may help save significant amount of network bandwidth. Use the RMAN Fast Incremental
Backup feature (based on Block Change Tracking) to optimize the performance of your daily
incremental backups.
Refer to My Oracle Support Doc ID 1640149.1 – Oracle Database Backup Service FAQ at
http://support.oracle.com for more details.
Conclusion
The Oracle Database Cloud Module allows customers to use Oracle Database Backup Service as their
offsite backup storage destination. Compared to traditional tape-based offsite storage, Cloud backups
are more accessible, faster to restore under most circumstances, and more reliable, while eliminating
the overheads associated with maintaining off-site backup operations. To top it all, existing RMAN
customers can leverage all the benefits of backing up to the Cloud with minimal changes to their
existing infrastructure

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Appendix
Configuration Files
The following table shows the various files involved in the overall Oracle Database Backup Service
configuration.
File name Location Purpose
libopc.so User specified library
location
SBT library which enables backup to
Oracle Cloud
opc<SID>.ora $ORACLE_HOME/dbs Contains ODBS container URL location
for the user and also the ODBS credential
wallet location
cwallet.sso User specified wallet
location
Oracle wallet which securely stores
ODBS credentials. This is used during
RMAN backups and restores operations.
Wallet for encryption
(optional – only needed
for TDE )
Either $ORACLE_BASE
/admin/$ORCLE_SID
/wallet (or) set in sqlnet.ora
(or) in a user defined
location
Oracle wallet for backup encryption.

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Example test run
.
Running the installer:
$mkdir /home/oracle/OPC/wallet
$mkdir /home/oracle/OPC/lib
$java -jar opc_install.jar -serviceName myService -identityDomain
myDomain -opcId testuser@oracle.com -opcPass abc123 -walletDir
/home/oracle/OPC/wallet -libDir /home/oracle/OPC/lib
Oracle Public Cloud Backup Service Install Tool, build 2014-01-21
Create credential oracle.security.client.connect_string1
Oracle Public Cloud Backup Service wallet created in directory
/home/oracle/OPC/wallet.
Oracle Public Cloud Backup Service initialization file
/orclhome/dbs/opcsr12.ora created.
Downloading Oracle Public Cloud Backup Service Software Library from
file opc_linux64.zip.
Downloaded 22237663 bytes in 0 seconds.
Download complete.
Content of opc initialization parameter file :
$ cat /orclhome/dbs/opcsr12.ora
OPC_HOST=https://storage.us2.oraclecloud.com/v1/myService-myDomain
OPC_WALLET='LOCATION=file:/home/oracle/OPC/wallet
CREDENTIAL_ALIAS=alias_opc'
Cloud backup module will not allow the backups to be performed without encryption.
RMAN> set encryption off;
executing command: SET encryption
RMAN> backup datafile 7;
Starting backup at 14-FEB-14
allocated channel: ORA_SBT_TAPE_1
channel ORA_SBT_TAPE_1: SID=117 device type=SBT_TAPE
channel ORA_SBT_TAPE_1: Oracle Database Backup Service Library
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=00007 name=//orclhome/dbs/tbs_22.f
channel ORA_SBT_TAPE_1: starting piece 1 at 14-FEB-14

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RMAN-00571:
===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS
RMAN-00571:
===========================================================
RMAN-03009: failure of backup command on ORA_SBT_TAPE_1 channel at
02/14/2014 13:58:45
ORA-27030: skgfwrt: sbtwrite2 returned error
ORA-19511: non RMAN, but media manager or vendor specific failure,
error text:
KBHS-01602: backup piece 12p0jski_1_1 is not encrypted
Using Password Encryption
RMAN> set encryption on identified by "abc123" only;
executing command: SET encryption
using channel ORA_SBT_TAPE_1
channel ORA_SBT_TAPE_1: finished piece 1 at 14-FEB-14
piece handle=0pp0jrl2_1_1 tag=TAG20140214T134154 comment=API Version
2.0,MMS Version 3.13.10.29
channel ORA_SBT_TAPE_1: backup set complete, elapsed time: 00:00:03
Finished backup at 14-FEB-14
Using Transparent Data Encryption
Create a wallet directory
$ mkdir $ORACLE_BASE/admin/$ORCLE_SID/wallet
SQL> alter system set encryption key identified by "abc123";
System altered.

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Now, configure the encryption and perform backup.
RMAN> configure encryption for database on;
new RMAN configuration parameters:
CONFIGURE ENCRYPTION FOR DATABASE ON;
new RMAN configuration parameters are successfully stored
channel ORA_SBT_TAPE_1: finished piece 1 at 14-FEB-14
piece handle=13p0jsn2_1_1 tag=TAG20140214T140002 comment=API Version
2.0,MMS Version 3.13.10.29
channel ORA_SBT_TAPE_1: backup set complete, elapsed time: 00:00:03
Finished backup at 14-FEB-14

Oracle Database Backup Service - TWP
JanuaryJadAuthor: Database High Availability
Oracle Corporation
World Headquarters
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Redwood Shores, CA 94065
U.S.A.
Worldwide Inquiries:
Phone: +1.650.506.7000
Fax: +1.650.506.7200
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