Data availability considerations for your CICS program

The data that a program needs to access may sometimes be unavailable. Use the following functions when data is not available.

Unavailability of a database
The conditions that make an entire database unavailable for both read and update are the following.
Unavailability of some data in a database
In addition to the situation where the entire database is unavailable, there are other situations where a limited amount of data is unavailable. One example is a failure situation involving data sharing where the IMS system knows which locks were held by a sharing IMS at the time the sharing IMS system failed. This IMS system continues to use the database but rejects access to the data that the failed IMS system held locked at the time of failure.
The SETS or SETU and ROLS functions
The SETS or SETU and ROLS requests allow an application to define multiple points at which to preserve the state of full-function databases.

Parent topic: Analyzing CICS application processing requirements