Planning the Exadata Storage Server Disk Group Layout

In general, follow this process to determine how to lay out your zones and clusters across the Exadata Storage Servers, where each decision point at the top of the process affects decisions made lower in the decision tree.

1. Determine the amount of existing usable disk space. How many Exadata Storage Servers are available for the clusters that you are creating? How much total usable disk space is available for those clusters?

2. Determine the number of clusters that you want for the zones that you are creating on the Database Domains. This, in conjunction with the total amount of existing usable disk space, is used to determine the maximum amount of space that will be available for each cluster.

3. Determine the amount of space to assign to each of the three disk groups in each cluster.

   • DATA

   • RECO

   • DBFS

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   Note - There is an option to designate the DBFS disk group set as UNUSED, if necessary.

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   Also determine the names to use for the disk groups for each cluster. For example, if you are creating disk groups for two clusters (ssc01r1 and ssc01r2), then you might use these names for the three disk groups for each cluster:

   • First cluster (ssc01r1):

     - DATA_ssc01r1

     - RECO_ssc01r1

     - DBFS_ssc01r1

   • Second cluster (ssc01r2):

     - DATA_ssc01r2

     - RECO_ssc01r2

     - DBFS_ssc01r2

Record your Exadata Storage Server disk group layout in the worksheet in Recording Your Exadata Storage Server Disk Group Layout.

The following topics provide more detailed information on each of these decisions points.

• Determine the Available Existing Storage Capacity

• Determine the Number of Clusters in the System and Maximum Amount of Space Available to Each Cluster

• Determine the Amount of Space for Each Disk Group in Each Cluster