Use of Locks

Use of Locks

• Locks in the JobScheduler prevent the execution of a job, as long as a particular lock has been acquired by one or more other jobs. Locks are available for individual jobs and for jobs in job chains. Should a job be waiting for a lock to be released (lock contention), then it will be automatically started as soon as the lock has been released.
• For a lock you configure how many jobs could use the lock non-exclusively, i.e. in parallel.
• A job can acquire multiple locks and can use them in exclusive or non-exclusive mode. 
  • If a lock is used non-exclusively then other jobs that use the same lock can start in parallel until the maximum number of non-exclusive jobs is reached.
  • If a job uses the lock in exclusive mode then other jobs with the same lock have to wait until the lock is released.

See also

• see http://www.sos-berlin.com/doc/en/scheduler.doc/lock.xml