DASD Logging situations
You can monitor the logging facility and online logging data sets.
- IMS_Logging_AutoArchive
- The logging facility is currently inactive. This is not a good
state to be in since you will lose the ability to recover your data
in case of errors. Check with the IMS administrator
to make sure that the logging facility is properly defined.
The formula is:
DASD_Logging.Auto_Archive EQ Inactive - IMS_LOGGING_WriteAhead
- The Write Ahead capability enables the system to write data quicker
by insuring that the resources needed for writing the data are available.
If this facility is not active, then some writes will take longer
to perform. Verify that write-ahead is enabled for the IMS system.
The formula is:
DASD_Logging.Write_Ahead_Status EQ Inactive - IMS_OLDS_I/O_Errors_Critical
- The number of Online Logging data sets that have had I/O errors
has exceeded the limit. This is an indication that you might be having
problems with the DASD devices where the data sets reside. Determine
what types of errors are being reported for the devices and move the
data sets to devices that are more stable.
The formula is:
DASD_Logging.OLDS_with_I/O_Errors GE 1 - IMS_OLDS_One_Active
- The count of Online Logging Datasets is one. This means that there
will be no place to write the logging information once this data set
fills up. Check the system configuration to ensure that multiple
online data sets are defined and that they are available to the IMS system.
The formula is:
DASD_Logging.OLDS_Active EQ 1