All Engineering

Personalization & Machine Learning for News Feeds and Social Networks

Winds is an open source RSS reader is powered by React, Redux, Sails and Stream. This tutorial explains how we’ve built personalization for Winds, as an example of how using Stream makes it easy to build personalized feeds. About Personalization Personalization is a very broad co…

An Introduction to Contextual Bandits

In this post I discuss the Multi Armed Bandit problem and its applications to feed personalization. First, I will use a simple synthetic example to visualize arm selection in with bandit algorithms, I also evaluate the performance of some of the best known algorithms on a dataset…

How to Setup a Highly Available Multi-AZ Cassandra Cluster on AWS EC2

Originally built by Facebook in 2009, Apache Cassandra is a free and open-source distributed database designed to handle large amounts of data across a large number of servers. Cassandra at Stream At Stream, we use Cassandra as the primary data store for our feeds. Cassandra stan…

Fast Recommendations for Activity Streams Using Vowpal Wabbit

The problem of content discovery and recommendation is very common in many machine learning applications: social networks, news aggregators and search engines are constantly updating and tweaking their algorithms to give individual users a unique experience. Personalization engin…

React/Redux – Best Practices & Gotchas

This is a bonus post in the Cabin tutorial series created by Visit for an overview of all the tutorials, as well as a live demo. The source code can be found on the Stream GitHub repository for Cabin, and all blog posts can be found at their respe…

Building News Feeds & Activity Streams With Meteor

We are happy to announce stream-meteor. This integration library makes it easy to build scalable newsfeeds and activity streams for your Meteor app.

Stream JavaScript & Node Client (V3)

Version 3 of the JavaScript & Node library adds support for new Stream API features, reduces the size of the distributable JavaScript file, creates library documentation pages, and improves browser compatibility of our client.

Redis: Reducing Memory Usage

Before switching from Redis, there are quite a few things you can do to reduce memory usage.

Python 3 & Stream Framework

Stream Framework now running on Python 3.4!

5 Reasons to Use Cassandra For Building Your Newsfeed

Users of the open source Stream-Framework often ask us if they should use Redis or Cassandra to power their newsfeed. This article highlights five scenarios in which you are better off going for Cassandra.

Scalability as a Service, Guest Post on HighScalability

Thierry wrote a guest post on HighScalability called Scalability as a Service. It explains the trend how development is moving towards a hosted component based approach.