Apache Cassandra™ 1.2

Configuring compression

Steps for configuring compression.

Compression is enabled by default in Cassandra 1.1 and later.

Procedure

  1. Disable compression, using CQL to set the compression parameters to an empty string.
    CREATE TABLE DogTypes (
                  block_id uuid,
                  species text,
                  alias text,
                  population varint,
                  PRIMARY KEY (block_id)
                )
                WITH compression = { 'sstable_compression' : '' };
  2. Enable compression on an existing table, using ALTER TABLE to set the compression algorithm sstable_compression to LZ4Compressor (Cassandra 1.2.2 and later), SnappyCompressor, or DeflateCompressor.
    CREATE TABLE DogTypes (
                  block_id uuid,
                  species text,
                  alias text,
                  population varint,
                  PRIMARY KEY (block_id)
                )
                WITH compression = { 'sstable_compression' : 'LZ4Compressor' };
  3. Change compression on an existing table, using ALTER TABLE and setting the compression algorithm sstable_compression to DeflateCompressor.
    ALTER TABLE CatTypes
      WITH compression = { 'sstable_compression' : 'DeflateCompressor', 'chunk_length_kb' : 64 }
    You tune data compression on a per-table basis using CQL to alter a table.
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