Appeal No. 2006-3096
Application No. 10/116,676
BACKGROUND
The Appellant's invention relates to a method and system for maintaining enhanced
file availability in a Virtual Storage Access Method (VSAM) system. An understanding
of the invention can be derived from a reading of exemplary claim 1, which is reproduced
below.
1. A method for enhancing VSAM files online availability,
comprising:
switching online traffic from a first group of files to a
second group of files, wherein the first group of files is identified by a
first name and the second group of files is identified by a second name,
and the first group of files identified by the first name contain old data and
the second group of files identified by the second name contain new data;
obtaining exclusive control of the first group of files;
renaming the first group of files from the first name to a
third name, during which online traffic accesses the second group of files;
switching online traffic from the second group of files to
the first group of files currently identified by the third name;
obtaining exclusive control of the second group of files;
renaming the second group of files from the second name
to the first name, during which online traffic accesses the first group of
files;
switching online traffic from the first group of files
currently identified by the third name to the second group of files currently
identified by the first name;
obtaining exclusive control of the first group of files
currently identified by the third name; and
renaming the first group of files currently identified by the
third name to the second name, during which online traffic accesses the
second group of files;
whereby at least one of the first and second groups of files
is available for online traffic during each of the renaming steps.
2
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