September 2018
Intermediate to advanced
398 pages
9h 43m
English
Content preview from Scala Programming Projects
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Offset management
Another important concept is that when a consumer reads a message, it will automatically inform Kafka of the offset that was read. This way, if a consumer dies, Kafka knows the offset of the last message read. When the consumer restarts, it can send the next message to it. As for the producer, we can decide when to commit offsets. There are three options :
- At most once; as soon as the message is received, the offset is committed.
- At least once; the offset is committed after the message has been processed.
- Exactly once; the offset is committed after the message has been processed, and there are additional constraints on the producer—it must not resend messages in case of network failures. The producer must have idempotent ...
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.