Selecting log records and LUOWs

Log Analyzer can filter log records by applying search criteria that you have specified by using the SELECT keyword on the FILTER control statement

SELECT filters reduce the volume of log records that you must handle interactively or manually. As more data is included, interactive or manual analysis becomes slower and more difficult. If you have a busy IMS environment, for best results you might have to identify a characteristic (such as a transaction origin, destination, or user ID) that is associated with the records of interest to you.

To apply SELECT filters and evaluate LUOWs, Log Analyzer performs the following steps:

  1. If you specified one or more SELECT filters, Log Analyzer processes each candidate log record as follows:

    1. Log Analyzer compares values of fields from within the record to the SELECT filters that you specified. 

    2. Log Analyzer records the result of the comparison. 

  2. Log Analyzer evaluates the LUOW to determine whether it is an LUOW of interest.

  3. Log Analyzer handles the evaluated LUOWs as follows:

    • If an LUOW is of interest, Log Analyzer retains it.

    • If an LUOW is not of interest, Log Analyzer discards it.

  4. Log Analyzer finalizes data and produces output data sets.

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