June 2021
Intermediate to advanced
264 pages
7h 19m
English
Content preview from 97 Things Every Data Engineer Should Know
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Chapter 42. Learn to Use a NoSQL Database, but Not like an RDBMS
Kirk Kirkconnell
It keeps happening: I keep reading posts or talking to people who are having problems with NoSQL databases, and so many times they blame the tool. NoSQL databases may no longer be the new kid on the block, but many people still seem to misunderstand when and why to use them.
I am speaking primarily of data modeling with NoSQL databases, especially when it comes to JSON document, wide column, and key/value types of databases. Some people still try to use them just as they did an RDBMS, but perhaps worse. They create a schema in the NoSQL database that is like a relational schema, and then perform what I would call a “naive migration” or “naive database schema.” Then they use it as a dumping ground for data, hoping to make sense of it by using a query language to work through the data. At that point, they wonder why the NoSQL database does not perform or scale well, or gets too expensive.
If you are performing these naive actions, you, too, are most likely failing to understand what these NoSQL databases are optimized for, the trade-offs you are making, the power they bring to the party, and how best to model data for easy access.
NoSQL databases perform and scale best when your schema is designed to model the application’s access patterns, the frequency with which those patterns are called, and the ...
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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.
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.