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Amazon Redshift Cookbook
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Amazon Redshift's columnar architecture stores data columns upon columns on disk. Analytical queries select a subset of the columns and perform aggregation on millions to billions of records. The columnar architecture reduces the I/O by selecting a subset of the columns, thus improving query performance. When data is ingested into the Amazon Redshift table, it provides three to four times compression. This further reduces the storage footprint, which, in turn, reduces I/O and hence improves query performance. Reducing the storage footprint also saves you money. Amazon Redshift Advisor provides recommendations for compressing any uncompressed tables.
In this recipe, you will learn how Amazon Redshift automatically applies compression to new and existing tables. You will also learn how column-level compression can be modified for existing columns.
To complete this recipe, you will need the following: