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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 operation of SORT is directed by control statements, which are largely compatible among various IBM and third-party sort programs. The SORT or MERGE statement defines the sort keys— the fields on which the data is to be sorted or merged. This statement identifies the position, length, and data type of each key.
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]
It added virtual memory in support of the new System/370 series hardware. It used a fixed page table which mapped a single address space of up to 16 megabytes for all partitions combined. DOS/VS increased the number of partitions (separate simultaneous programs) from three (named Background, Foreground 1 and Foreground 2) to five (BG and F1 ...
The primary market for Syncsort was for IBM mainframes running OS/VS1 or MVS operating systems. [4] There were also Syncsort products for two other common IBM mainframe operating environments, those being DOS [11] and VM/CMS. [12] Aso O. Tavitian was the primary salesman for the company in its early years, and was primarily responsible for its ...
Mainframe sort merge; Support programs for OS/360 and successors; Michigan Terminal System; MTS system architecture; MUSIC/SP; MVS; O. Object access method ...
TSOS was the first mainframe, demand paged, virtual memory operating system on the market. The Spectra series was later supplemented by the RCA Series (RCA 2, 3, 6, 7— later renamed the 70/2, 70/3, 70/6, and 70/7, [5] which competed against the IBM System/370.
The System/36 also had many mainframe features such as programmable job queues and scheduling priority levels. While these systems were similar to other manufacturer's minicomputers , IBM themselves described the System/32, System/34 and System/36 as "small systems" [ 2 ] and later as midrange computers along with the System/38 and succeeding ...