December 2006
Intermediate to advanced
228 pages
6h 20m
English
book
Introduction to the New Mainframe: Large-Scale Commercial Computing
by Mike Ebbers, Pilar Gonzalez Adrados, Frank Byrne, Rodney Martin, Jon Veilleux
Content preview from Introduction to the New Mainframe: Large-Scale Commercial Computing
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Chapter 6. Accessing large amounts of data 121
6.12 Data sharing
The ability to share data for both reading and updating, from multiple programs
that can be running on different physical machines, is a key requirement for
capacity, scalability, and availability. The problem to be solved in any environment
is how to indicate an interest in a piece of data and lock it for updating, without
impacting performance.
To achieve data sharing in z/OS, Parallel Sysplex is required, with structures in
the Coupling Facility (CF) providing the necessary mechanisms. Parallel Sysplex
is described in more detail in 5.4.3, “Continuous availability of mainframes using
clustering” on page 98 and 3.3.3, “Parallel Sysplex” on page 48.
6.13 Data Facility Storage ...
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