Tech – Mainframe

Posts related to the mainframe world

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Tech - Mainframe

Useful VTAM commands

4th September 2010 Rui Miguel Feio
1. Display commands D NET,VTAMOPTS Display VTAM options, including SUBAREA Number, NETID, SSCPNAME, SSCPID D NET,BFRUSE Display information about VTAM¢s virtual storage and buffer pool usage D NET,APPLS Display the applications (APPLIDS) that VTAM knows about D NET,PATHTAB Display the status of communications PATHs between subareas in the VTAM network […]
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Glossary

Modified Link Pack Area (MLPA)

4th September 2010 Rui Miguel Feio
It’s defined in SYS1.PARMLIB(IEALPAxx). Can be used to contain reenterable load modules from APF-Authorized libraries that are to be part of the pageable extension to the Link Pack Area (LPA) during the current IPL. Can only have PDS files. PDS/Es are not allowed. LPA modules that have been replaced through […]
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Glossary

Fixed Link Pack Area (FLPA)

4th September 2010 Rui Miguel Feio
It’s defined in SYS1.PARMLIB(IEAFIXxx). It’s a non-pageale area of storage. It’s loaded at IPL time from IEAFIXxx. The data sets in its concatenation must be in the Master Catalog. The Load modules must be kept in Fixed Storage Frames, ie, they cannot be paged out. This area should be used […]
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Glossary

Pageable Link Pack Area (PLPA)

4th September 2010 Rui Miguel Feio
It’s defined in SYS1.PARMLIB(LPALSTxx). It’s an area of Common Storage that is loaded at IPL time. This area contains SVC routines, access methods, and other READ-ONLY System Programs, along with any READ-ONLY reenterable user programs selected by an installation that can be shared among users of the system. There cannot […]
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Glossary

Link Pack Area (LPA)

4th September 2010 Rui Miguel Feio
It’s a common Virtual Storage Area. It’s non-getmainable. It’s built at IPL time by loading Load modules contained in SYS1.LPALIB and its concatenations. There are 2 LPAs: one above “the line” (16MB) and the other below depending on the residence mode of the load module. Because the Load modules are […]