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VSAM Management

Override

Buffer Management System

Platform: z/OS

Although VSAM is very important to most installations, it is rarely used optimally. Override significantly increases the performance of VSAM in every installation, update, dump, and copy your critical information.

  • Performance benefits can be so significant that it may be possible in some cases to defer the purchase of new hardware. Perhaps best of all, these savings can be realized almost immediately.
  • Override installs in minutes with no need to change any existing files, programs, or JCL.
  • Override does not alter any VSAM files or make modifications to VSAM itself.
  • The following savings have been achieved in benchmarks of real-life applications:
Physical I/Os Elapsed
Typical sequential access 33% 10-50%
Typical random access 25-50% 40-60%
Clustered random access 99% 95%
  • Override remains transparent to the programs involved.

Data Sheet

Override for zOS
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