NDB Concepts › Alerts for VSAM Monitoring

Alerts for VSAM Monitoring

You can create alerts for VSAM files allocated to your CA Mainframe Network Management product region. This includes the NDBs because they use the same VSAM API. Event Distribution Services (EDS) creates events for file open, close, allocate, unallocated, and so on.

In addition, you can also use the following events that are triggered by VSAM return and feedback codes:

• $$SYS.FILE.EOV for End Of Volume (new data or index extent)
• $$SYS.FILE.CA.SPLIT for a VSAM control area split (not used by the VSAM monitor)
• $$SYS.FILE.FULL for a file full condition
• $$SYS.FILE.SHORTAGE for a string or buffer shortage
• $$SYS.FILE.ERROR for a VSAM error condition

These events are trapped by the VSAM monitor and alerts are raised if required. Log files and files opened for input are excluded from alerts related to file size because log files wrap and input files cannot be extended by the region's activity.

Alerts for String / Buffer shortage or file extensions are optional. If you do not want the IPLOG or EVNTDB to be automatically resized, you should clear the file extension severity count; otherwise, resize is attempted when the Extents count is exceeded.