June 2017
Beginner to intermediate
404 pages
8h 22m
English
Content preview from Learning Elasticsearch
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Change mappings/settings
Reindex API can be used to change the index settings like increasing/decreasing the number of shards, disabling the _all field and so on. It can also be used to change the mapping of an existing field, for example, you want to change the mapping of an keyword field to date.
The Shrink API can also be used to decrease the number of shards. To decrease the number of shards, Shrink API is relatively much cheaper than the reindex operation. Please refer to the Shrink API section for more details.
To change the index setting/mappings of the existing index, first create the destination index with the desired settings and use the Reindex API as shown next:
POST _reindex { "source": { "index": "source_index" }, "dest": { ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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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.