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Creating the SRL volume on the primary site

Create the Storage Replicator Log (SRL), a volume in the Replicated Volume Group (RVG). The RVG also holds the data volumes for replication.

• The data volume on the secondary site has the same name and the same size as the data volume on the primary site.

  See Setting up a secondary site

• The SRL on the secondary site has the same name and the same size as the SRL on the primary site.
• The data volume and the SRL should exist in the same disk group.
• If possible, create SRLs on disks without other volumes.
• Mirror SRLs and data volumes in the absence of hardware-based mirroring.

After determining the size of the SRL volume, create the volume in the shared disk group for the Oracle database. If hardware-based mirroring does not exist in your setup, use the nmirror option to mirror the volume. In this example, the Oracle database is in the oradatadg shared disk group on the primary site and the size required for the SRL volume is 1.5 GB:

 To create the SRL volume on the primary site

1. On the primary site, determine the size of the SRL volume based on the configuration and use.

   See the Veritas Volume Replicator documentation for details.

2. Determine whether a node is the master or the slave:

   # vxdctl -c mode

3. From the master node, issue the following command:

   # vxassist -g oradatadgmake rac1_srl 1500M nmirror=2 disk4 disk5

   Make sure that the data disk has a minimum of 500M of free space after creating the SRL volume.

4. Start the SRL volume by starting all volumes in the disk group:

   # vxvol -g oradatadg startall