What is checkpoint restart option in jcl?

Questions by kvskris   answers by kvskris

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Hervey

  • Oct 30th, 2006
 

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. 

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kumar

  • Oct 30th, 2006
 

thank you, harvey

regards,

kumar

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VIDESH

  • May 12th, 2008
 

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

all resources are released.

For Db2 checkpoint
Write Db2 ckpt=Y in Jcl

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