Appendix III: Terminology

This section contains definitions of the key terms used throughout this book in discussing the performance of computer systems.

Note: Some terms are unique to certain types of operating systems, others cross-operating system. Some are only applicable to High Performance Computing (HPC).

2PC: see two-phase commit.

7 layer model: see seven-layer model.

ACID properties: In nonsimple software interactions, particularly those involving middleware, there can be synchronization issues in data updates. One way of ensuring consistency is via the properties in the acronym ACID: atomicity, consistency, isolation, and durability. These are the mainstays of online transaction processing (OLTP) and databases, particularly in a distributed ...

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