VSAM Operating Environment Considerations

The VSAM Write Data Adapter works with FOCUS in the VM/ESA and OS/390 operating environments.

Under VM/ESA VSAM data sources on DOS-formatted minidisks are all available to the data adapter. When VSAM is installed using the Cross Machine Interface (XMI), however, only read access is supported and VSAM data cannot be modified.

Under OS/390, users have the choice of submitting jobs in batch mode or running them interactively and can access files controlled by either the Integrated Catalog Facility (ICF) or the VSAM Master Catalog.


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