June 2019
Beginner to intermediate
360 pages
10h 55m
English
Content preview from Big Data Simplified
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Introducing Spark andKafka | 147
6.2.5 Why is Kafka so Fast?
Kafka relies heavily on the OS kernel to move data around quickly. It relies on the principals of
Zero Copy. Kafka enables you to batch data records into chunks. These batches of data can be seen
end to end from Producer to le system (Kafka Topic Log) to the Consumer. Batching allows for
more efcient data compression and reduces I/O latency. Kafka writes to the immutable commit
log to the disk sequential and thus, it avoids random disk access, slow disk seeking. Kafka pro-
vides horizontal scale through sharding. It shards a Topic Log into hundreds and potentially thou-
sands of ...
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