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 5. Availability 91
• Either inter-transaction or system-image affinity may have a
consequence for failover integrity, such as using a component
(physical) or name (logical) unique to a specific system or runtime
environment.
Using a memory counter.
Time stamps between server environments (timers and expiration events).
Parallel execution may have a consequence in that you cannot assume the
next transaction will always run on the same system:
– Keeping working storage or temporary areas specific to a system (pinned
memory) may cause unpredictable results in the event another image
needs to run the workload.
– Do not assume the execution of work will always be the same as the order
of arrival.
– Do not design an application associated ...
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