Paper Summary: Monarch: Google Planet-Scale In-memory Time Series Database

This week I read Monarch paper by Google engineers. The paper covers in detail design decisions involved in building Monarch. Monarch as the title of the paper suggests is an in-memory time series database. It is used by Google monitoring system that monitors most of the Google web properties like Gmail, Youtube, and Google Maps.

Every second, the system ingests terabytes of time series data into memory and serves millions of queries.

These are some very big numbers. Most of us do not have to deal with such large volume of data in our day to day work. Reading this paper can help us understand how engineers building such system make design decisions and tradeoffs.

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