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

Compress Your Data Files

We strongly recommend that you individually compress your load files using gzip, lzop, or bzip2 when you have large datasets.

Specify the GZIP, LZOP, or BZIP2 option with the COPY command. This example loads the TIME table from a pipe-delimited lzop file.

copy time from 's3://mybucket/data/timerows.lzo' iam_role 'arn:aws:iam::0123456789012:role/MyRedshiftRole' lzop delimiter '|';