July 2010
Intermediate to advanced
448 pages
12h 22m
English
Content preview from Physical Database Design
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10.1 Application to Physical Database Design 183
10.1.4 Counting for Shared-nothing Partitioning Design
As a reminder, shared-nothing partitioning is usually based on a hashing scheme that
hashes records to data nodes (see Figure 10.1). Real-world systems exist with as little as
two data nodes and as many as several hundred.
For the database to perform well, it is critical that data be distributed across the
data nodes fairly evenly. Having a data node with less data than others isn’t going to
cause massive problems, but having a partition with a disproportionately large amount
of data will usually mean that partition will become the slowest partition ...
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