Tuesday, July 14, 2015

Optimizing Caching: Twemproxy and Memcached at Flickr

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Flickr places a high priority on our users’ experience, and a critical part of that experience is the speed of the interface. Regardless of the client you use to access Flickr, caching the proper data and the speed at which our servers can access cached data is critical to delivering on that quality user experience. The more effective our caching strategy is, the better the Flickr experience will be for our users. This is true for all the layers of caching we deploy at Flickr from the photo caches to the process data caches buried deep in the system. In a previous post, we looked at how regional photo caching improved photo serving time in other countries, in this post we’re going to dive down into the innards of Flickr’s software stack and take a look at how we improved Memcached performance for our backend systems.

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