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The Sort/Merge utility is a mainframe program to sort records in a file into a specified order, merge pre-sorted files into a sorted file, or copy selected records. Internally, these utilities use one or more of the standard sorting algorithms , often with proprietary fine-tuned code.
The OS/360 sort program, IERRCO00, operates by dividing the input data into sections, sorting each section in main memory, and writing the sorted section to intermediate datasets on either direct-access storage devices (DASD) or magnetic tape. Final merge phases then merge the sections to produce the sorted output.
<opcode> is a function such as "FSF" to forward space one file or "REW" to rewind the tape. <nn> is a number that can specify the number of times the operation is to be performed, such as forward space two files. The VOL statement provides disk or tape volume label information for standard label checking. The format is // VOL SYSxxx,<volume>.
Sort may refer to: Sorting, any process of arranging items in sequence or in sets Sorting algorithm, any algorithm for ordering a list of elements; Mainframe sort merge, sort utility for IBM mainframe systems; Sort (Unix), which sorts the lines of a file; Sort (C++), a function in the C++ Standard Template Library; SORT
Innovative Routines International (IRI), Inc. is an American software company first known for bringing mainframe sort merge functionality into open systems. [1] IRI was the first vendor to develop a commercial replacement for the Unix sort command, and combine data transformation and reporting in Unix batch processing environments. [2]
The IBM 2560 Multi-Function Card Machine (MFCM) [6] is a peripheral first offered on the Model 20. Due to its reliability problems, often involving card jams, the acronym was frequently interpreted as referring to many less favorable names.
Underlying ISPF/PDF is an extensive set of tools that allow application developers to create panel-driven applications, and a set of guidelines to promote consistent use of ISPF functions. A "panel" is a character-based "window" which can encompass all or part of a 3270 session's screen real estate. See Text-based user interfaces.
External sorting algorithms generally fall into two types, distribution sorting, which resembles quicksort, and external merge sort, which resembles merge sort. External merge sort typically uses a hybrid sort-merge strategy. In the sorting phase, chunks of data small enough to fit in main memory are read, sorted, and written out to a temporary ...