March 2008
Intermediate to advanced
604 pages
18h 38m
English
Content preview from Programming Amazon Web ServicesBecome 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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Online Backup with AWS::S3
The possibility of maintaining online backups of your important files at little cost is one of the most obvious and compelling uses of S3. There are already a number of third-party tools available for backing up your files in S3 with support for file versioning and scheduled uploads. If you are looking for such a tool, check the Amazon Web Services (AWS) Solution Center to see what is available. However, because you sometimes need to create your own solution, we will work through a simple example that demonstrates how to create a very simple backup tool in Ruby using the AWS::S3 library.
Our objectives for this backup solution are very modest indeed. We will not store different file version snapshots, nor will we implement complex schemes to allow for efficient file renaming or rearrangement of large files into smaller, more manageable chunks. Our backup process will comprise only the following steps:
Find all the files in a local directory to be backed up.
List the objects that are already present in S3.
Upload the local files that are not already present in S3, or whose contents have changed since the object was last uploaded to S3.
Delete objects stored in S3 when the corresponding local file has been deleted or renamed.
AWS::S3 Ruby Library
In this example we will use the excellent Ruby S3 library, AWS::S3, which may be found at http://amazon.rubyforge.org/. Our example is based on version 0.4.0 of this library.
AWS::S3 provides an object-oriented view of ...
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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.