April 2017
Beginner to intermediate
360 pages
9h 35m
English
Content preview from Learning Apache Cassandra - Second Edition
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Choosing the right consistency level
We've explored how the process of updating alice's e-mail address would work at the consistency levels ONE, ALL, and QUORUM. But what consistency levels should the MyStatus application actually use?
We recognized earlier that in the case where alice updates her own user profile and then views the results, eventual consistency is undesirable: if she sees an outdated copy of her profile, it may appear that her e-mail address update did not work at all. So, we will want to ensure that from alice's standpoint, changes to her profile are immediately consistent.
We've seen that of the two levels that ensure immediate consistency, QUORUM has considerably more appeal from the perspective of fault tolerance and ...
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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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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.