Giannis Neokleous, Paul Sastrasinh Maintaining a large distributed service-oriented platform is hard. As both the organization and the architecture grows, and more features are added, it becomes increasingly harder to keep a mental picture of all the services and pockets of knowledge that start forming across the organization. Existing, manually…

Written by Giannis Neokleous The previous blog post talked about why Knewton needed a distributed tracing system and the value it can add to a company. This section will go into more technical detail as to how we implemented our distributed tracing solution. General Architecture and Tracing Data Management Our solution has two main parts: the…

Written by Giannis Neokleous Here at Knewton we use Cassandra for storing a variety of data. Since we follow a service-oriented architecture, many of our internal services are backed by their own data store. Some of the types of data we store include student events, recommendations, course graphs, and parameters…