July 2011
Intermediate to advanced
88 pages
1h 52m
English
Content preview from Deploying OpenStackBecome 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,
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.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.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.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.
Chapter 2. Understanding Swift
Swift is the oldest and probably the mature project within OpenStack. It is the underlying technology that powers Rackspace’s Cloud Files™ service. While it only interacts tangentially with Nova (as shown in Chapter 3), it is still important in the overall scheme of understanding OpenStack.
Swift aims to provide a massively scalable and redundant object store conceptually similar to Amazon’s S3 service. To provide this scalability and redundancy, it writes multiple copies of each object to multiple storage servers within separate “zones.” Zones are a logical grouping of storage servers that have been isolated from each other to guard against failures. The level of isolation is up to the cloud operator; they can be isolated on differing servers (ability to lose individual servers), different racks (ability to lose entire rack), different sections of the data center, or even different data centers. Each choice provides a different level of isolation and cost.
Caution
Many beginners assume that Swift will take the place of their file server and that they will be able to easily mount volumes on their desktops to access their files. This is not the case. Swift is an object store, not a file server. While these sound similar, there are important differences. Object stores simply save files in logical groupings (called “containers” in Swift parlance) via a RESTful protocol. They do not provide a true filesystem, nor are they accessible through standard file ...
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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.