Cassandra CQL的限制，CassandraCQL限制

Cassandra CQL的限制，CassandraCQL限制

Cassandra一些数据得遵守以下   上限：

• Cells in a partition: ~2 billion (231); single column value size: 2 GB ( 1 MB is recommended)
• Clustering column value, length of: 65535 (216-1)
• Key length: 65535 (216-1)
• Table / CF name length: 48 characters
• Keyspace name length: 48 characters
• Query parameters in a query: 65535 (216-1)
• Statements in a batch: 65535 (216-1)
• Fields in a tuple: 32768 (215) (just a few fields, such as 2-10, are recommended)
• Collection (List): collection limit: ~2 billion (231); values size: 65535 (216-1) (Cassandra 2.1 and later, using native protocol v3)
• Collection (Set): collection limit: ~2 billion (231); values size: 65535 (216-1) (Cassandra 2.1 and later, using native protocol v3)
• Collection (Map): collection limit: ~2 billion (231); number of keys: 65535 (216-1); values size: 65535 (216-1) (Cassandra 2.1 and later, using native protocol v3)
• Blob size: 2 GB ( less than 1 MB is recommended)

Note: The limits specified for collections are for non-frozen collections.
大家都能看得懂，我就不一一翻译了。更详细请参考： http://docs.datastax.com/en/cql/3.3/cql/cql_reference/refLimits.html#refLimits