October 2015
Intermediate to advanced
374 pages
11h 5m
English
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10 Distributed Database Systems
For several decades, centralized database management systems – running on a single database server – have been predominant. There are several reasons for this:
– complexity of a single-server system was lower and administration easier;
– the prevalent use case was to evaluate short queries (frequent reads) on a coherent set of data, whereas data modifications happened only rarely (infrequent writes);
– network communication speed was slow and hence sending data between different servers was too costly;
– parallelization required rewriting a query into subqueries and recombining the results and this overhead diminished the positive effects of a parallel execution of subqueries.
Whenever there were more demanding ...
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