“Data stream” is a word that can be used in multiple ways. A stream can refer to data in motion or data at rest. 

When a stream is data in motion, an endpoint is receiving new pieces of data on a continual basis. Each new data point is sent over the wire and captured by the other end. Another way a stream can be represented is as a sequence of events that have been written to a storage medium. This is a stream at rest.

Pravega is a system for storing large streams of data. Pravega can be used as an alternative to systems like Apache Kafka or Apache Pulsar. Flavio Junquiera is an engineer at Dell EMC who works on Pravega. He joins the show to talk about the history of stream processing and his work on Pravega.