September 2018
Intermediate to advanced
398 pages
9h 43m
English
Content preview from Scala Programming Projects
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Introducing Spark Streaming
In Chapter 10, Fetching and Persisting Bitcoin Market Data, we used Spark to save transactions in a batch mode. The batch mode is fine when you have to perform an analysis on a bunch of data all at once.
But in some cases, you might need to process data as it is entering into the system. For example, in a trading system, you might want to analyze all the transactions done by the broker to detect fraudulent transactions. You could perform this analysis in batch mode after the market is closed; but in this case, you can only act after the fact.
Spark Streaming allows you to consume a streaming source (file, socket, and Kafka topic) by dividing the input data into many micro-batches. Each micro-batch is an RDD that ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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