Sybase ETL 4.9 has extended its scheduler functionality to all available platforms by providing its own ETL Scheduler. The ETL Scheduler allows you to create, list, edit, delete, execute, and terminate scheduled tasks using a selected engine from the ETL Development GUI.Earlier versions of Sybase ETL Development used the Windows Task Scheduler directly. If you are upgrading from Sybase ETL Development 4.8 or earlier and want to migrate scheduled tasks, you must import existing tasks using the Runtime Manager.
Additionally, the ETL Scheduler can simultaneously run multiple instances of a task. For an already running scheduled task, you can specify any one of these options:
Execute new task concurrently – starts new schedule execution along with the current process.
Execute new task sequentially – waits to start next schedule execution until the completion of the current process.
Do not execute new task – continues processing current task and ignores request to start a new schedule execution.
Cancel the running task before executing new task – stops current process and starts the new schedule execution immediately.
ETL Scheduler follows a file-based configuration. All configurations are stored in a stand alone flat file with each grid engine. A file lock is used to ensure that only one ETL Schedule service is started per host machine. Sybase recommends that you do not manually modify the configuration file. Use the ETL Runtime Manager from the ETL Development GUI for any scheduler configuration.
See Chapter 4, “Advanced Concepts and Tools” in the Sybase ETL 4.9 Users Guide.
