What is checkpoint restart option in jcl?

A checkpoint restart is a way of logging updates to a database. The method is useful when a database becomes corrupt due to a code problem; the DB can be restored from backup and then a "forward recovery" can be don by using this checkpoint restart method and a limited number of updates applied.  

As to how the checkpoint-restart method is used in JCL, that depends on how the application is set-up for forward recovery during batch abends. 

thank you, harvey

regards,

kumar

Checkpoint/restart is a technique to write a batch programme such that at: regulated moments (checkpoints),

·         the status of the programme is saved

·         all updates to data are committed