Oct 5, 2018

[HDGEM] Columnar databases store data by column instead of by row.

As a result, all values of the same column can be stored sequentially on disk.

This structure significantly speeds up analytical queries by only reading the columns involved in the query, resulting in accelerated disk access and CPU cache.

Posted By Blogger to HDGEM at 3/23/2017 11:25:00 AM

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