August 2017
Beginner to intermediate
278 pages
6h 40m
English
book
Building Data Streaming Applications with Apache Kafka
by Chanchal Singh, Manisha Sethi, Manish Kumar, Anshul Joshi
Content preview from Building Data Streaming Applications with Apache Kafka
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Consumer request processing
Same as the producer requests, consumer fetch requests start with metadata requests. Once the consumer is aware of the leader information, it forms a fetch request containing an offset from which it wants to read the data. It also provides the minimum and maximum number of messages it wants to read from the leader broker.
The consumer can pre-allocate memory for the response from the broker, and therefore, we should specify the maximum limit of memory allocation. If the minimum limit is not specified, there could be inefficient utilization of resources when the broker sends a small portion of the data for which very little memory is required. Instead of processing a small amount of data, the consumer can wait for ...
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