3-22 Oracle Fusion Middleware Disaster Recovery Guide
To update the Middleware home list to add or remove a WL_HOME, edit the user_ home
beabeahomelist file. This would be required for any nodes installed additionally to the ones shown in this topology.
3.2.3 Storage Replication
This section provides guidelines on creating volumes on the shared storage. Depending on the capabilities of the storage replication technology available with
your preferred storage device you may need to create mount points, directories and symbolic links on each of the nodes within a tier.
If your storage devices storage replication technology guarantees consistent replication across multiple volumes:
■
Create one volume per server running on that tier. For example, on the application tier, you can create one volume for the WebLogic Administration Server and
another volume for the Managed Servers.
■
Create one consistency group for each tier with the volumes for that tier as its members.
■
Note that if a volume is mounted by two systems simultaneously, a clustered file system may be required for this, depending on the storage subsystem. However,
there is no known case of a single file or directory tree being concurrently accessed by Oracle processes on different systems. NFS is a clustered file system, so no
additional clustered file system software is required if you are using NFS-attached storage.
If your storage devices storage replication technology does not guarantee consistent replication across multiple volumes:
■
Create a volume for each tier. For example, you can create one volume for the application tier, one for the web tier, and so on.
■
Create a separate directory for each node in that tier. For example, you can create a directory for SOAHOST1 under the application tier volume; create a directory for
WEBHOST1 under the web tier volume, and so on.
■
Create a mount point directory on each node to the directory on the volume.
■
Create a symbolic link to the mount point directory. A symbolic link should be created so that the same directory structure can be used across the nodes in a tier.
■
Note that if a volume is mounted by two systems simultaneously, a clustered file system may be required for this, depending on the storage subsystem. However,
there is no known case of a single file or directory tree being concurrently accessed by Oracle processes on different systems. NFS is a clustered file system, so no
additional clustered file system software is required if you are using NFS-attached storage.
Design Considerations 3-23
3.2.4 File-Based Persistent Store
