Setting Up Sun Cluster HA for Sybase Clients

Clients must always refer to the Sybase database by using the logical host name, not the physical host name. Except for during start-up, the database should always be available if the logical host is responding on the network.

Sybase client-server connections will not survive a Sun Cluster HA for Sybase switchover. The client application must be prepared to cope with disconnection and reconnection or recovery as appropriate. A transaction monitor might simplify the application. Further, Sun Cluster HA for Sybase server recovery time is application dependent.

If your application uses functions from RDBMS dynamic link libraries, you must ensure that these libraries are available in the event of failover. To do so:

• Install the link libraries on the client, or

• If Sun Cluster HA for NFS service is to be provided by the cluster, copy the libraries to the logical host and set the environment variables to the directory path of the link libraries, then share those directories to clients by using NFS.