Progress
Version 9
Product Update Bulletin
The isalive and looksalive Parameters
The
isalive
andlooksalive
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:
db-name
Specifies a database to be queried. The database must be a member of the cluster. The database name must contain the fully qualified path.
The looksalive exit status returns the following text if the database 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:
where db-name is the fully qualified path of the database.
To determine if a resource is actually operational, enter the following command:
db-name
Specifies a database to be queried. The database must be a member of the cluster. The database name must contain the fully qualified path.
The isalive exit status returns the following text if the database returns a successful query:
All other states return the following:
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