July 2009
Beginner to intermediate
384 pages
12h 56m
English
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Chapter 4. Cloud Storage Design in a PNUTShell
Introduction
YAHOO! RUNS SOME OF THE WORLD'S MOST POPULAR WEBSITES, AND EVERY MONTH OVER HALF A BILLION people visit those sites. These websites are powered by database infrastructures that store user profiles, photos, restaurant reviews, blog posts, and a remarkable array of other kinds of data. Yahoo! has developed and deployed mature, stable database architectures to support its sites, and to provide low-latency access to data so that pages load quickly.
Unfortunately, these systems suffer from some important limitations. First, adding system capacity is often difficult, requiring months of planning and data reorganization, and impacting the quality of service experienced by applications during the transition. Some systems have a hard upper limit on the scale they can support, even if sufficient hardware were to be added. Second, many systems were designed a long time ago, with a single datacenter in mind. Since then, Yahoo! has grown to a global brand with a large user base spread all over the world. To provide these users with a good experience, we have to replicate data to be close to them so that their pages load quickly. Since the database systems did not provide global replication as a built-in feature, applications had to build it themselves, resulting in complex application logic and brittle infrastructure. Because of all the effort required to deploy a large-scale, geographically ...
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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.