DB2 for z/OS Locking for Application Developers Part 7

By Gareth Copplestone-Jones, Triton Consulting

This is the seventh article in the series on DB2 Locking for Application Developers. So far we’ve covered a lot of topics, including the ACID database transaction properties, lock size, lock mode and lock duration, transaction isolation levels and data anomalies, all with a view to understanding how data integrity and application performance requirements can only be achieved by the application being coded according to the isolation level and data currency options in use.

In this article we’ll start off by looking at which isolation levels are susceptible to which data anomalies before moving on to discuss the related topic of data currency.

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