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VSAM Management

Override Buffer Management System

Although VSAM is very important to most installations, it is rarely used optimally. Override significantly increases the performance of VSAM in every installation.

  • 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/O's

    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.


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Documentation

Data Sheet

Available Downloads

Override 3.0A