In recent years, a number of data storage systems have been developed with excellent horizontal scaling properties. Most are commonly called "NoSQL" systems. Horizontal scaling allows dozens or hundreds of machines to operate as a single database system, with performance improving approximately linearly with the number of machines. This is interesting because traditional relational database syste
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The world of scalable databases is not a simple one. They come in every race, creed, and color. Rick Cattell has brought some harmony to that world by publishing High Performance Scalable Data Stores, a nicely detailed one stop shop paper comparing scalable databases soley on the content of their character. Ironically, the first step in that evaluation is dividing the world into four groups: Key-v
If you look at the early days of this blog, when web scalability was still in its heady bloom of youth, many of the articles had to do with leveraging MySQL and memcached. Exciting times. Shard MySQL to handle high write loads, cache objects in memcached to handle high read loads, and then write a lot of glue code to make it all work together. That was state of the art, that was how it was done. T
By Jonathan Ellis, Systems Architect Unprecedented data volumes are driving businesses to look at alternatives to the traditional relational database technology that has served us well for over thirty years. Collectively, these alternatives have become known as “NoSQL databases.” The fundamental problem is that relational databases cannot handle many modern workloads. There are three specific pr
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