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Pure in-memory cache VS persistent cache?

Elliptics contains built-in LRU in-memory cache with timeouts. This is a rather demanded feature used in our most intensive workloads. Elliptics distributed cache is more preferable than memcache and...

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Distributed in-memory cache in Elliptics

Ruslan “elessar” Nigmatullin wrote a new aricle on elliptics cache architecture: http://doc.reverbrain.com/elliptics:cache It describes how cache is organized, how one can use it to speed up disk...

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New elliptics HTTP proxy, authentification, caching and Go bindings

I separated elliptics HTTP proxy from our high-performance server HTTP framework TheVoid. TheVoid continues to be a framework for writing HTTP servers in C++, whlist Rift becomes elliptics HTTP access...

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SLRU cache in Elliptics

In order to add some flexibility to our cache-layer, we replaced simple LRU-cache with Segmented-LRU-cache. It’s structure perfectly handles the concept of “hot data” which is so common in real world...

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An analysis of Facebook photo caching

Rift was created to fulfill the edge/origin stack gap in elliptics stack. Rift and its caching+bucket layer allows not only to have multiple levels of caches but also to finely tune caching...

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Rift persistent caching

Rift allows you to store popular content into separate groups for caching. This is quite different from elliptics cache where data is stored in memory in segmented LRU lists. Persistent caching allows...

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Elliptics, golang, GC and performance

Elliptics distributed storage has native C/C++ client API as well as Python (comes with elliptics sources) and Golang bindings. There is also elliptics http proxy Rift. I like golang because of its...

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How is Redis used in twitter

Everyone knows Redis – high-performance persistent cache system. Here is an article on how Redis is being used in Twitter. It happens that Twitter not only forked and extended 1 year old Redis version,...

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Various flash caches benchmarked

Guys from Swrve have benchmarked various flash caches in front of Amazon EBS volume and shared the results. Data shows that Facebook’s Flashcache performs the best. Swrve decided to replace safety with...

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Facebook’s hot, warm and graph data

Facebook is a maze for developing data store and access algorithms. Their scale allows and actually requires to find out new ways of storing information. For example social graph data – it is stored in...

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