MGMT 1040 Chapter Notes - Chapter 11: Transaction Processing
8 May 2018
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MGMT 1040 Chapter 11 Notes – Summary
Introduction
• In fact, for most business programs and for nearly every multimedia application, I/O is
the predominant factor.
• E-commerce applications offer an even bigger challenge
• Web services generally require massive amounts of fast I/O to handle and process I/O
requests as they occur.
• The speed at which most of these programs operate is determined by the ability of their
I/O operations to stay ahead of their processing.
• With PCs rapidly increasing in CPU processing capability
• Still somewhat limited in I/O processing, it has been greater I/O capability that has
maintained
• Until recently, the advantage of mainframe computers over PCs for business transaction
processing.
• We handled input and output in the Little Man Computer by providing input and output
baskets for that purpose.
• Each input instruction transferred one three-digit data number from the input basket to
the calculator
• Similarly, each output instruction transferred one data number from the calculator to
the output basket.
• If we wanted to input three numbers, for example, an input instruction had to be
executed three times.
• This could be done with three separate input instructions or in a loop
• Either way, each individual piece of data required the execution of a separate input
instruction.
• It is possible to transfer data between input and output devices and the CPU of a real
computer in a similar manner.
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