How Commitment and Roll back control is used in as400,
explain with real time senario ???
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Answer Posted / garry
With commit/rollback we can ensure data consistency.
Consider a scearion where commit/rollback is not used.
Suppose your program writes/updates 10 files. In case the
program fails in between (say after updating 5 files),
there will be data in 5 files and corresponding data will
not be available in 5 files.
If we introduce commit/rollback in above program. In case
of program failure changes made to 5 files can be rolled
back so that we don't have inconsistency between files.
with Commit/rollback we can ensure either all files are
updated or not file is updated.
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