3 Strong Reasons Why Logs You Need for IMS DB Program

IMS creates logs of activity that are performed during online executions.

Logging in IMS DB database
[Logging in IMS DB database]

These log-records are initially written to an OLDS, and then copied to the system log-dataset (SLDS). The log records that reflect completed operations not yet written to an OLDS is recorded on a write-ahead data set (WADS).

IMS 12 improves the functionality of IMS logging by adding Extended Format support and providing the buffer allocation beyond the 31-bit, among other improvements.

The benefits of this enhancement is to increase logging rates while releasing storage in the extended common service area (ECSA). The key differences -Command code Vs Processing code

IMS logger:

Logs are the list of all activities:

  • Work that has been done and changes that have been made
  • To know about state of the system. This is you can recover in the even of failure
  • IMS DB logs make recovery and restart is possible

The log-records contain information about:

  • When IMS starts and shuts down
  • When programs start and terminate
  • Changes made to the database

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Author: Srini

Experienced software developer. Skills in Development, Coding, Testing and Debugging. Good Data analytic skills (Data Warehousing and BI). Also skills in Mainframe.