5.7. RLS performance

Even knowing that the major reason for implementing RLS is availability, in this topic we discuss the performance considerations caused by such migration, that is, from non-RLS to RLS mode.

Performance is a matter of subjectivity and relativity. In each performance evaluation task, we need to have very clear objectives and to what objectives we should relate the measured numbers. Here in this topic, we have two types of goals:

  • Compare theoretically — although supported by IBM experiences — a CICSPlex® without RLS data sharing with the same environment but with RLS. Refer to “CICSPlex RLS performance comparison” on page 299.

  • Compare practically (with experiments) batch workload accessing VSAM clusters in non-RLS and in RLS ...

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