4087x -

: In the event of a system failure, these log records provide the "snapshot" necessary for the system to restart and restore data integrity.

: Track how often checkpoints occur and ensure active datasets are being logged correctly. : In the event of a system failure,

Within the Merrill Consultants documentation for VMAC28 (a format for processing IMS log records), it is categorized alongside other system checkpoint markers such as: : Checkpoint DMCB/DMAC '4085'X : Checkpoint MTO Buffer '4086'X : Checkpoint DMHR/DEDB '4087'X : Checkpoint ADSC This record is part of the system's logging

Specifically, is the identifier for a Checkpoint ADSC (Active Dataset Control) record. This record is part of the system's logging mechanism that tracks the state of active datasets during a checkpoint process. Functional Role in Mainframe Systems : In the event of a system failure,

: Tools like MXG use these identifiers to convert raw mainframe log data into readable reports for capacity planning. formats.sas.txt - Merrill Consultants