November 2015
Beginner to intermediate
248 pages
5h 24m
English
Content preview from Learning CouchbaseBecome 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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Indexes
You have understood what a MapReduce program is and how it is used to create views in the Couchbase cluster. A view helps us to retrieve or search for a document by attributes of the document other than the document ID. In a database terminology, which is called an index, that enables to fetch documents using some look up mechanism, indexes help to search for a document in an efficient manner. As discussed earlier, MapReduce allows to create views/indexes on documents that is stored locally on each node. Index creation occurs in parallel in each node within the cluster. Finally, when clients query views, the results from all nodes are combined and provided to clients. Indexes and views are optimized for search and aggregations, which will ...
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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.