To prepare a host as a shadow master, the following requirements must be met:
The shadow master host must share sge_qmaster's status information, job configuration, and queue configuration logged to disk. In particular, a shadow master host needs read/write root access to the master host's spool directory and to the directory sge-root/cell/common.
Either the Berkeley DB RPC server or classic grid engine system spooling must be used for sge_qmaster spooling. For more information, see Database Server and Spooling Host in N1 Grid Engine 6 Installation Guide.
The shadow-master-hostname file must contain a line that defines the host as shadow master host.
As soon as these requirements are met, the shadow-master-host facility is activated for this host. No restart of grid engine system daemons is necessary to activate the feature.