June 2017
Beginner to intermediate
404 pages
8h 22m
English
Content preview from Learning Elasticsearch
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Update by query
Update by Query API is used to update all documents that match a particular query. Depending on the number of documents in the index, this can be a very resource-demanding operation and can slow the existing search or index operations. We will discuss the different ways to control the number of requests per second and how to parallel this operation.
For example, for the products we indexed using the bulk API in the previous section, we want to add a new price_with_tax field, which contains the price plus tax. We will use update by query and scripting for the calculation. Assuming 10% is the tax, we will use the unit price to determine the price with tax. We will be use the default scripting language Painless for this operation. ...
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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.