Enable Failover Support for an RSSD Connection

Use Sybase Failover to configure two version 12.0 or later Adaptive Servers as companions. If the primary companion fails, the devices, databases, and connections of the primary companion can be taken over by the secondary companion.

For more detailed information about how Sybase Failover works in Adaptive Server, see Using Sybase Failover in a High Availability System which is part of the Adaptive Server Enterprise documentation set.

To enable Failover support for an RSSD connection, use either of the following methods:

Use rs_init when you install a new Replication Server.

For instructions, see Replication Server Configuration Guide > Configure Replication Server and Add Databases Using rs_init for your platform.
Edit the Replication Server configuration file after you have installed the Replication Server.
1. Use a text editor to open the Replication Server configuration file. The default file name is the Replication Server name with a “.cfg” extension.
  
  The configuration file contains one line per entry.
2. Find the line “RSSD_ha_failover=no” and change it to:
```
	RSSD_ha_failover=yes
```
3. To disable Failover support for an RSSD connection, change the “RSSD_ha_failover=yes” to:
```
	RSSD_ha_failover=no
```
  These changes take affect immediately; that is, you do not have to restart Replication Server to enable Failover support.

If you cannot recover the most recent database state of the RSSD, see Replication Server Administration Guide Volume 2 > Replication System Recovery > Recover from RSSD failure.

Note: It is not possible to migrate an RSSD database across platforms using commands such as, cross-platform dump and load, or bcp. To migrate, you must rebuild the replication system on the new platform.

For instructions on how to enable Failover support for non-RSSD Replication Server connections to Adaptive Server, see Replication Server Administration Guide Volume 2 > Replication System Recovery > Configure the Replication System to Support Sybase Failover.