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Making the Case for Database Sharding Using a Proxy

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Making the Case for Database Sharding Using a Proxy

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There are several ways to implement sharding in your application. The first and by far the most popular, is to implement it inside your application. It can be implemented as part of your own Data Access Layer, database driver, or an ORM extension. However, there are many limitations with such implementation, which drove us, at ScaleBase, to look for an alternative architecture.

As the above diagram shows, ScaleBase is implemented as a standalone proxy. There are several benefits to using such an architecture.

First and foremost, since the sharding logic is not embedded inside the application, third party applications can be used, be it MySQL Workbench, MySQL command line interface or any other third party product. This translates to a huge saving in the day-to-day costs of both developers and system administrators.

Backup can be executed via the proxy, and so allows users to consistently backup a sharded environment – not an easy task when sharding is developed internally.

Since the application server machines are usually highly utilized (as they should be, to optimize costs), running additional code on application server machines will just slow them down. Running the code on external proxies allows for a more efficient division of tasks between the servers, and allows requests to be unaffected by data crunching (for instance cross-shard queries) requests.

So all in all there are many reasons to run sharding code outside the scope of the application and application server. If you’re interested – we’d love to chat.

 

Source: http://www.scalebase.com/making-the-case-for-sharding-using-a-database-proxy/

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