June 2017
Beginner to intermediate
404 pages
8h 22m
English
Content preview from Learning Elasticsearch
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CRUD from translog
We discussed in the previous section that the data you index is only available for search after one second. That's because the refresh process runs once a second and makes the data searchable by writing it to the inverted index. But when you retrieve a document by its ID, you will always get the latest data.
When you retrieve a document by its ID, Elasticsearch will check the translog to see if the translog contains the latest data that is not committed to the inverted index yet.
Although documents are searchable only after the refresh process runs, when a document is retrieved using its ID, you will always get the latest data.
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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.