Table 1. System performance comparison for old and new architectures.

Infrastructure Processing billions of events in real time at Twitter At Twitter, we process approximately 400 billion events in real time and generate petabyte (PB) scale data every day. There are various event sources we consume data from, and they are produced in different platforms and storage systems, such as Hadoop, Vertica, Manhattan distributed databases, Kafka, Twitter Eventbus, GCS, BigQu

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