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# Apache Cassandra 2.x CQL binding
Binding for [Apache Cassandra](http://cassandra.apache.org), using the CQL API
via the [DataStax
driver](http://docs.datastax.com/en/developer/java-driver/2.1/java-driver/whatsNew2.html).
To run against the (deprecated) Cassandra Thrift API, use the `cassandra-10` binding.
## Creating a table for use with YCSB
For keyspace `ycsb`, table `usertable`:
cqlsh> create keyspace ycsb
WITH REPLICATION = {'class' : 'SimpleStrategy', 'replication_factor': 3 };
cqlsh> USE ycsb;
cqlsh> create table usertable (
y_id varchar primary key,
field0 varchar,
field1 varchar,
field2 varchar,
field3 varchar,
field4 varchar,
field5 varchar,
field6 varchar,
field7 varchar,
field8 varchar,
field9 varchar);
**Note that `replication_factor` and consistency levels (below) will affect performance.**
## Cassandra Configuration Parameters
- `hosts` (**required**)
- Cassandra nodes to connect to.
- No default.
* `port`
* CQL port for communicating with Cassandra cluster.
* Default is `9042`.
- `cassandra.keyspace`
Keyspace name - must match the keyspace for the table created (see above).
See http://docs.datastax.com/en/cql/3.1/cql/cql_reference/create_keyspace_r.html for details.
- Default value is `ycsb`
- `cassandra.username`
- `cassandra.password`
- Optional user name and password for authentication. See http://docs.datastax.com/en/cassandra/2.0/cassandra/security/security_config_native_authenticate_t.html for details.
* `cassandra.readconsistencylevel`
* `cassandra.writeconsistencylevel`
* Default value is `ONE`
- Consistency level for reads and writes, respectively. See the [DataStax documentation](http://docs.datastax.com/en/cassandra/2.0/cassandra/dml/dml_config_consistency_c.html) for details.
* *Note that the default setting does not provide durability in the face of node failure. Changing this setting will affect observed performance.* See also `replication_factor`, above.
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