What is the purpose of the gsd service in Oracle 9i RAC?

GSD is only needed for configuration/management of cluster database. Once database has been configured and up, it can be safely stopped provided you don't run any 'srvctl or dbca or dbua' tools. In 9iRAC, the GSD doesn't write anywhere unless tracing was turned on, in which case traces go to stdout.

Once the database has been configured and started and you don't use 'srvctl or EM' to manage or 'dbca to extend/remove' or 'dbua to upgrade' this database, GSD can be stopped. More.

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