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From "Stu Hood (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-2398) Type specific compression
Date Mon, 28 Mar 2011 19:32:05 GMT
Type specific compression
-------------------------

                 Key: CASSANDRA-2398
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2398
             Project: Cassandra
          Issue Type: New Feature
          Components: Core
    Affects Versions: 0.8
            Reporter: Stu Hood


Cassandra has a lot of locations that are ripe for type specific compression. A short list:

Indexes
 * Keys compressed as BytesType, which could default to LZO/LZMA
 * Offsets (delta and varint encoding)
 * Column names added by 2319
Data
 * Keys, columns, timestamps: see http://wiki.apache.org/cassandra/FileFormatDesignDoc

A basic interface for type specific compression could be as simple as:
{code:java}
public void compress(int version, Iterator<ByteBuffer> from, int count, DataOutput to)
throws IOException
public void decompress(int version, DataInput from, List<ByteBuffer> to) throws IOException
{code} 

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