Amazon Redshift
Database Developer Guide (API Version 2012-12-01)

Zstandard Encoding

Zstandard (ZSTD) encoding provides a high compression ratio with very good performance across diverse data sets. ZSTD works especially well with CHAR and VARCHAR columns that store a wide range of long and short strings, such as product descriptions, user comments, logs, and JSON strings. Where some algorithms, such as Delta encoding or Mostly encoding, can potentially use more storage space than no compression, ZSTD is very unlikely to increase disk usage. ZSTD supports all Amazon Redshift data types.