Modifying Global Service Attributes

To change global service properties or where it runs in a pool, perform GDSCTL modify service.

The modify service command is used to modify global service attributes. In addition to specifying service properties (such as role, maximum lag, load balancing method, and so on) service attributes define on which databases the service should run. Therefore modify service can be used to add a database to a service, remove it from a service, or move a service from one database to another. As the result of the command execution, a service may be created, deleted, started, or stopped on one or more databases in a Global Data Services pool.

Most global service attributes are specified at the service creation time in the add service command and only need to be modified when some changes have to be made. However, a few service attributes related to Oracle RAC databases, must be set by executing the modify service command right after the add service command has been executed. These attributes include the name of the server pool, instance cardinality (UNIFORM/) and some other parameters that are specific to particular Oracle RAC databases. Such attributes cannot be set by the add service command because this command is only used to specify attributes that have the same values for all databases in a Global Data Services pool.