Content Recommendation Widgets: How Do They Work?

From Outbrain to Taboola and now AddThis––the great thing about content-based recommendation tools is that you have lots of great options and don’t have to limit your site to just one. Although they all recommend content, they each work differently, and have unique capabilities and algorithms for you to consider.

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Hydra Internals: Efficient Storage of Nested Hierarchical Data

Hydra is a distributed data processing and storage system developed at AddThis, which we recently released as open source. It ingests streams of data and builds hierarchical tree structures that are aggregates, summaries, or transformations of the data. Sibling nodes in the tree are stored in lexicographic sorted order. This ordering is often used explicitly by the human when writing queries or implicitly by the query system to optimize the execution of queries. Continue →