April 2009
Intermediate to advanced
204 pages
6h 58m
English
Content preview from Cloud Application ArchitecturesBecome 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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Database Management
The trickiest part of managing a cloud infrastructure is the management of your persistent data. Persistent data is essentially any data that needs to survive the destruction of your cloud environment. Because you can easily reconstruct your operating system, software, and simple configuration files, they do not qualify as persistent data. Only the data that cannot be reconstituted qualify. If you are following my recommendations, this data lives in your database engine.
The problem of maintaining database consistency is not unique to the cloud. The cloud simply brings a new challenge to an old problem of backing up your database, because your database server in the cloud will be much less reliable than your database server in a physical infrastructure. The virtual server running your database will fail completely and without warning. Count on it.
Whether physical or virtual, when a database server fails, there is the distinct possibility that the files that comprise the database state will get corrupted. The likelihood of that disaster depends on which database engine you are using, but it can happen with just about any engine out there.
Absent of corruption issues, dealing with a database server in the cloud is very simple. In fact, it is much easier to recover from the failure of a server in a virtualized environment than in the physical world: simply launch a new instance from your database machine image, mount the old block storage device, and you are up and ...
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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.