cassandra.pool - Hosts and Connection Pools

Connection pooling and host management.

class cassandra.pool.Host

Represents a single Cassandra node.

is_up = None

True if the node is considered up, False if it is considered down, and None if it is not known if the node is up or down.

version = None

A tuple representing the Cassandra version for this host. This will remain as None if the version is unknown.

address = None

The IP address or hostname of the node.

conviction_policy = None

A ConvictionPolicy instance for determining when this node should be marked up or down.

datacenter None

The datacenter the node is in.

rack None

The rack the node is in.

exception cassandra.pool.NoConnectionsAvailable

All existing connections to a given host are busy, or there are no open connections.