Understanding multiple server support

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Data Protection for SAP supports multiple servers, which can distribute backup data among two (or more) backup servers. This feature helps eliminate constraints that are frequently encountered among backup servers.

Figure 1. Multiple servers

This graphic shows the principle of using multiple servers. The data to be backed up is sent through the network to more than one IBM Storage Protect server (backup server). The servers write the data to their attached backup tapes.

A server statement must be entered in the Data Protection for SAP profile for each adapter of the backup server. A description for the SERVER keyword is given in the Profile parameter descriptions topic. The value of the MAX_SESSIONS keyword is not greater than the sum of all SESSION values specified for the SERVER statements that are used concurrently.

When RMAN is used, the number of SESSION configured for each SERVER must be greater than or equal to the number of sessions that are configured for the MAX_SESSIONS keyword that are specified during restore operations. This configuration prevents RMAN from requesting a number of objects (in parallel from the same server) that exceeds the number of sessions that are available for that server.