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The Access Method Services utility program IDCAMS is commonly used to manipulate ("delete and define") VSAM data sets. Custom programs can access VSAM datasets through Data Definition (DD) statements in Job Control Language (JCL), via dynamic allocation or in online regions such as in Customer Information Control System (CICS).
Starting in z/OS V1R7, ISAM data sets can no longer be processed (created, opened, copied or dumped). ISAM data sets that are still in use must be converted to VSAM key-sequenced data sets. Prior to z/OS V1R7, you could use access method services to allocate a VSAM key-sequenced data set and copy an ISAM data set into it.
Job Control Language (JCL) is a scripting language used on IBM mainframe operating systems to instruct the system on how to run a batch job or start a subsystem. [1] The purpose of JCL is to say which programs to run, using which files or devices [2] for input or output, and at times to also indicate under what conditions to skip a step.
All the compiled languages use pretty much the same JCL, with a compile step, (usually) link step, and GO step. There are some language dependencies, but they are pretty small. On the other hand, VSAM has its own IDCAMS, and associated JCL. Also, VSAM is used with more than one language, so I would agree with a MOS:SEEALSO for VSAM. (Does the ...
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The Biden administration is negotiating with Afghanistan to exchange Americans detained in the country for at least one high-profile prisoner held in Guantanamo Bay with alleged ties to former al ...
As Russian troops approached Dniprorudne in their February 2022 invasion of Ukraine, the city's long-term mayor Yevhen Matvieiev could have fled to safety. Instead, he stayed behind to coordinate ...
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