August 2019
Intermediate to advanced
560 pages
13h 41m
English
Content preview from Advanced Elasticsearch 7.0
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The multi-search API
Similar to the Bulk API, Elasticsearch provides you with a way to gather multiple search (_msearch) requests together to send out in a batch. You need to put the header and the corresponding request body as a pair in the multi-search request body. You can specify the appropriate index names and parameters in the header, including search_type, preference, and routing. The header content type must be set to the newline delimited JSON format (application/x-ndjson).
Now, let's look at an example to issue an _msearch request that contains two sub-requests to find those EFTs in the cf_etf and cf_view indices that do not have the rating field. In the following screenshot, you can see that the response body has a responses
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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.