Search results
Results from the WOW.Com Content Network
The first IBM PC in 1981 had 16 KB or 64 KB of memory and would process about 330K instructions per second. [16] [17] As a result, JCL had to be easy for the computer to process, and ease of use by programmers was a much lower priority. In this era, programmers were much cheaper than computers. JCL was designed for batch processing. As such, it ...
While traditional batch streams often contain such jobs, this kind of processing can be introduced using, for example IBM's DFSORT product or BatchPipeWorks (part of BatchPipes). Criticism. One of the key implementation considerations is scheduling the reader and writer jobs to run together. In practical batch schedules this might not be feasible.
The IBM mainframe z/OS operating system or platform has arguably the most highly refined and evolved set of batch processing facilities owing to its origins, long history, and continuing evolution. Today such systems commonly support hundreds or even thousands of concurrent online and batch tasks within a single operating system image.
They are designed to provide efficient execution of batch jobs. Job processing is divided into several phases to provide parallelism through pipelining. These phases include input processing where jobs are read and interpreted, the execution phase where jobs run, and output processing where job output is printed or stored on DASD. Jobs that are ...
OS/360, officially known as IBM System/360 Operating System, [1] [2] is a discontinued batch processing operating system developed by IBM for their then-new System/360 mainframe computer, announced in 1964; it was influenced by the earlier IBSYS/IBJOB and Input/Output Control System (IOCS) packages for the IBM 7090/7094 [citation needed] and even more so by the PR155 Operating System for the ...
Steps in a job are executed sequentially, possibly depending on the results of previous steps, particularly in batch processing. The term "job stream" is particularly associated with mainframes; in the IBM z/OS operating system, a job is initiated by a // JOB and terminated by the next // JOB or // statement.
Batch processing, such as billing, became even more important (and larger) with the growth of e-business, and mainframes are particularly adept at large-scale batch computing. Another factor currently increasing mainframe use is the development of the Linux operating system, which arrived on IBM mainframe systems in 1999.
The IBM 2780 and the IBM 3780 are devices developed by IBM for performing remote job entry (RJE) and other batch functions over telephone [a] lines; they communicate with the mainframe via Binary Synchronous Communications (BSC or Bisync) and replaced older terminals using synchronous transmit-receive (STR).