Release 10.1A: OpenEdge Data Management:
Database Administration

Isalive and looksalive

The isalive and looksalive parameters query the cluster manager software about the state of a database. With Isalive, the query is made to the active system and the check is known to be accurate. With Looksalive, on systems where the cluster manager maintains a cache of the cluster state, PROCLUSTER will query the cache instead of the active system. There is a small window of opportunity where the cache and the system could be out of sync.

To determine if a resource looks operational, enter the following command:

procluster db-name looksalive

The looksalive exit status returns the following text if the database looks alive:

Resource: db-name State: Looks Alive

The only state of the database that returns a value of Looks Alive is when the database is enabled and started. All other states will return the following:

Resource: db-name State: Not Alive

where db-name is the fully qualified path of the database.

To determine if a resource is actually operational, enter the following command:

procluster db-name isalive

The isalive exit status returns the following text if the database returns a successful query:

Resource: db-name State: Is Alive

All other states return the following:

Resource: db-name State: Not Alive