November 2017
Beginner to intermediate
290 pages
7h 34m
English
book
Learning Apache Apex
by Ananth Gundabattula, Thomas Weise, Munagala V. Ramanath, David Yan, Kenneth Knowles
Content preview from Learning Apache Apex
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Partitioning toolkit
Partitioning is appropriate, as described in the previous section, when an operator is likely to become a bottleneck. An operator is a bottleneck if it is unable to process the input stream at the required speed, causing tuples to back up in upstream buffers. Often, this also means lowered throughput and increased latencies between the time an input tuple enters the input port of the operator and the corresponding computed output tuple(s) leave the output port(s). If such an increase in latency or reduction in throughput is transient—lasts no more than a few seconds—then partitioning may not be needed (and may even be detrimental since it causes interruption of processing while existing operators are brought down and ...
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