Mainframe Performance Topics with Martin Packer

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Memories of DFSORT OUTFIL

MartinPacker Comments (2) Visits (17001)

In September 1997 DFSORT Release 13 was shipped (to coincide with the release of OS/390 Release 4). It took a nice idea from Syncsort and extended it. In case you didn't know OUTFIL allows you to read an input data set (and perhaps sort it) and write to multiple output files from the resulting records - perhaps selecting subsets of the records and reformatting them (and differently to each output... [More]

Tags: hbaid smf=full sequential hipersorting excp hiperbatch dfsort sysevent qsam stripes compression pmio smf16 outfil stgtest smf dfsms batchpipes/mvs bsam

Batch Capacity Planning, Part 2 - Memory

MartinPacker Visits (12697)

I can't believe it's been almost a week since I wrote Batch Capacity Planning, Part 1 - CPU . Where did the time go? Re-reading it I'm struck by the overwhelming theme of Batch's unpredictability and lumpiness. This is true of memory, as well, but to a much lesser degree. Why to a lesser degree? Well, in most systems I look at the memory usage is mostly fairly constant and dominated by big... [More]

Tags: cics capacity_planning dataspace batch smf72 non-swappable swappable vsam dfsort lsr smf71 memory smf30 dim rmf z/os db2 parallelism ims hipersorting

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Memories of DFSORT OUTFIL

Batch Capacity Planning, Part 2 - Memory