Decorating a high velocity event stream with contextual information – on PNDA

How to contextualise streaming events with PNDA Often, to do meaningful analytics on data you need to decorate an input event stream with additional information looked up from another data store. In this post I will discuss a design pattern for doing such a task on PNDA. This will provide an efficient implementation of a … Continue reading Decorating a high velocity event stream with contextual information – on PNDA

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Different ways to query data from PNDA

There are several different methods of storing and querying data in PNDA and they trade off ease of use, query time and flexibility of computation. In this post I give my thoughts on some methods I've used in the past, and tips for when to use each approach. Store data in HDFS and produce static … Continue reading Different ways to query data from PNDA