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NetVault Plug-in for Oracle 10.0.5 - 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-in in a failover cluster environment Using the plug-in with Oracle® Data Guard Troubleshooting Glossary

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 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 a different node if the current node becomes unavailable.
 
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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 procedures 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, review all cluster-related information provided in the Dell NetVault Backup Administrator’s Guide to understand how the following information works with Oracle Server Failover Cluster functionality.

Installing the plug-in

Use the following sections to install the plug-in:
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Installation prerequisites
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Installing the software
Installation prerequisites
The following prerequisites must be met before you install Plug‑in for Oracle in a clustered environment:
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Oracle® Failover clustering environment in place: You must have a properly configured Oracle Cluster environment.
 
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IMPORTANT: Support for this feature was tested on Windows Server® using the Oracle Fail Safe Clustering feature and employing a two-node Oracle (v6.5) cluster configuration with shared storage containing the database data files and logs. If you intend to use clustering in a different configuration, test backups and restores before deploying it in a production environment.
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Separate NetVault Backup Server machine: The machine that is to serve as the NetVault Backup Server must be properly configured. This machine must exist outside the Oracle Server cluster, but have network connectivity to the nodes (hosts) within the cluster.

Installing the software

Installation of the plug-in for a clustered environment is different than the traditional installation of this plug-in. This process is completed through the creation of a Virtual Client on the NetVault Backup Server. A Virtual Client is a group of nodes within the cluster that are seen by the NetVault Backup Server as a single client that is created to back up a single clustered service.
Creating a Virtual Client
As noted earlier, the Virtual Client creation process is not plug-in-specific, and you can find complete details in the Dell NetVault Backup Administrator’s Guide. However, consider the following points during the Virtual Client creation process:
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Assign a name to the Virtual Client: Dell recommends that you use the virtual-network name assigned to the Oracle® Database as the NetVault Backup Virtual Client name; you can also use a name that is easily associated with the Oracle Database or cluster environment. This configuration makes it easier to recognize the Oracle Database for which the NetVault Backup Virtual Client was created.
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Only include relevant cluster nodes in the Virtual Client: The hosts that are to be included in the creation of a Virtual Client should only be those nodes within the cluster that are relevant to the Oracle Database Server that is to be backed up and restored.
After the creation of the Virtual Client, the plug-in is transferred to all designated cluster nodes and installed locally. You can use the installed Plug‑in for Oracle by using the Virtual Client to back up and restore shared data (you can only perform backups and restores of data established as shared within the cluster).

Licensing the plug-in

Another difference between using Plug‑in for Oracle in a clustered environment is how it is licensed for use. The plug-in supports backup and restore of shared data only. Hence, for an Oracle® Database Server Failover Cluster environment, only a single license would be needed — a clustered application license for the Virtual Client.
For information on the licensing process, including how to obtain the proper license keys, see the Dell NetVault Backup Installation Guide.
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