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NetVault Plug-in for Oracle 7.1 - User Guide

Introducing Dell™ NetVault™ Backup Plug‑in for Oracle® Defining a backup strategy Installing and removing the plug-in Configuring the plug-in Backing up data Using the Oracle Flashback Database Restoring data
Restoring and recovering data – an overview Performing User Managed restores Using advanced User Managed restore procedures Performing RMAN restores Using RMAN types of recovery in a non-RAC environment Using advanced procedures with RMAN restores
Maintaining the Recovery Catalog Using the RMAN CLI Using the Plug-in with Oracle RAC Using the Plug-inin a failover cluster environment Using the plug-in with Oracle Data Guard Troubleshooting Glossary About Dell

Duplicating a database in a RAC environment

A Duplicate Database backup lets the DBA create a duplicate or clone of a source database for special purposes that must not affect the overall backup and restore procedures for the source database. In a RAC environment, Oracle does not support duplicating a multi-instance database to another multi-instance database. However, Oracle does support duplicating a multi-instance database to a single-instance database followed by converting the single-instance database to a multi-instance database. For more information, refer to the Oracle Real Application Clusters Installation Guide.
Restoring a Duplicate Database backup to the same RAC Environment is almost identical to restoring a Duplicate Database backup in a single-instance environment except for the following described in the following sections.
Prerequisites
PFILE updated with auxiliary values – In addition to the updates to the PFILE as specified in the Non-RAC duplication procedures, the following additional updates must be made when the source database is a multi-instance database:
1
Comment out the RAC-related parameters by inserting a “#” (number sign) at the beginning of the entry.
Sample RAC-related parameters include:
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.cluster_database_instances = N
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.cluster_database=TRUE
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<database/instance_name>.cluster_database=TRUE
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<instance_name>.instance_number=N
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<instance_name>.thread = N
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<instance_name>.undo_tablespace = '<tablespace_name>'
2
Add the following parameters:
<auxiliary_instance_name>.undo_tablespace='<undo_tablespace>'
<auxiliary_instance_name>.thread = 1

Post-restore procedure

After completion of the Restore Duplicate Database Procedure as defined in the Duplicating a database in a non-RAC environment, you can convert the resulting single-instance database to a multi-instance database using the one of the procedures detailed in Converting to Oracle Real application Clusters from Single-Instance Oracle Databases in the Oracle Real Application Clusters Installation Guide.

Using the Plug-inin a failover cluster environment

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Oracle Server Fail Safe Failover Clustering – an overview
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Installing the plug-in
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Licensing the plug-in
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Configuring the plug-in and adding a database
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Backing up data
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Restoring data

Oracle Server Fail Safe Failover Clustering – an overview

Oracle Fail Safe Failover Clustering (Active/Passive) is designed to provide high-availability for an entire Oracle Server instance. For example, you can configure an Oracle Server instance on one node of a failover cluster to fail over to any other node in the cluster during a hardware failure, OS failure, or a planned upgrade.
A failover cluster is a combination of one or more nodes (hosts) with one or more shared disks. Various resources hosted by the nodes, such as IP, shared storage, and an application (Oracle in this case) can be grouped together to create a Clustered Service. A Virtual Service appears on the network as if it were a single computer running an application, but provides failover from one node to another node if the current node becomes unavailable.
 
 
*IMPORTANT: In NetVault Backup terminology, a clustered service is accessed by a Virtual Client. The references to Virtual Client in Plug‑in for Oracle are basically references to the Clustered Service in the Oracle Server Failover Cluster environment.
Plug‑in for Oracle provides support for Oracle Server Failover Clustering. Using the failover cluster network name, the plug-in is able to identify the current node that is in control of the Oracle Server Clustered Service and target it for backup.
This section points out differences between the setup and usage of the plug-in in a Failover Cluster environment vs. a traditional one. It mirrors the sections found in the standard instructions, as follows:
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Installing the plug-in
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Licensing the plug-in
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Configuring the plug-in and adding a database
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Backing up data
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Restoring data
Important considerations
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Unless outlined in the sections that follow, backups and restores performed with the plug-in of clustered data are the same as those performed with traditional Oracle Server data.
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The following sections only offer information on Oracle-specific settings required for the use of this plug-in in a Failover Cluster environment. They do not offer instructions on how to set up NetVault Backup’s Application Cluster Support to administer backups and restores of non-Oracle Server-related data and files. This process is not plug-in-specific, and you can find complete details in the Dell NetVault Backup Administrator’s Guide.
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Before you continue, Dell strongly recommends that you review all cluster-related information provided in the Dell NetVault Backup Administrator’s Guide to understand how the following information works in conjunction with Oracle Server Failover Cluster functionality.
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