April 2017
Intermediate to advanced
470 pages
11h 12m
English
Content preview from Mastering OpenStack - Second Edition
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Storage policy and erasure coding
The traditional way of providing high availability of data in Swift is to maintain multiple copies of it and disperse them on different regions, zones, nodes, and disks. This strategy works well from a redundancy perspective but the storage cost associated with this approach is quite high. With a default replication level of three copies for each object stored, the amount of available storage is reduced to a third of the actual available capacity.
Depending of the criticality of the data, you may be willing to invest in maintaining data in triplicate for redundancy. This presents a challenge to afford an expensive Swift object storage system to fulfill data availability and performance requirements. The Swift ...
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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.