Citus 10.2 is out! 10.2 brings you new columnar & time series features—and is ready to support Postgres 14. Read the new Citus 10.2 blog.
Citus 10 is out! Check out the Citus 10 blog post for all the details. Citus is an open source extension to Postgres (not a fork) that enables scale-out, but offers other great features, too. See the Citus docs and the Citus github repo and README.
This post will highlight Citus Columnar, one of the big new features in Citus 10. You can also take a look at the columnar documentation. Citus Columnar can be used with or without the scale-out features of Citus.
Postgres typically stores data using the
heap access method, which is row-based storage. Row-based tables are good for transactional workloads, but can cause excessive IO for some analytic queries.
Columnar storage is a new way to store data in a Postgres table. Columnar groups data together by column instead of by row; and compresses the data, too. Arranging data by column tends to compress well, and it also means that queries can skip over columns they don’t need. Columnar dramatically reduces the IO needed to answer a typical analytic query—often by 10X!Keep reading