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New Encodings to Improve ClickHouse Efficiency

July 10, 2019

Modern analytical databases would not exist without efficient data compression. Storage gets cheaper and more performant, but data sizes typically grow even faster. Moore’s Law for big data outperforms its analogy in hardware. In our blog we already wrote about ClickHouse compression (https://www.altinity.com/blog/2017/11/21/compression-in-clickhouse) and Low Cardinality data type wrapper (https://www.altinity.com/blog/2019/3/27/low-cardinality). In this article we will describe and test the most advanced ClickHouse encodings, which especially shine for time series data. We are proud that some of those encodings have been contributed to ClickHouse by Altinity.

This article presents an early preview of new encoding functionality for ClickHouse release 19.11. As of the time of writing, release 19.11 is not yet available. In order to test new encodings ClickHouse can be built from source, or a testing build can be installed. We expect that ClickHouse release 19.11 should be available in public releases in a few weeks.

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