Hosts and Connection Pools — Cassandra Driver 3.13.0 documentation (original) (raw)

Connection pooling and host management.

class cassandra.pool. Host[source]¶

Represents a single Cassandra node.

broadcast_address = None¶

broadcast address configured for the node, if available (‘peer’ in system.peers table). This is not present in the system.local table for older versions of Cassandra. It is also not queried iftoken_metadata_enabled is False.

listen_address = None¶

listen address configured for the node, if available. This is only available in the system.local table for newer versions of Cassandra. It is also not queried if token_metadata_enabled is False. Usually the same as broadcast_address unless configured differently in cassandra.yaml.

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.

release_version = None¶

release_version as queried from the control connection system tables

dse_version = None¶

dse_version as queried from the control connection system tables. Only populated when connecting to DSE with this property available. Not queried if token_metadata_enabled is False.

dse_workload = None¶

DSE workload queried from the control connection system tables. Only populated when connecting to DSE with this property available. Not queried if token_metadata_enabled is False.

address = None¶

The IP address of the node. This is the RPC address the driver uses when connecting to the node

conviction_policy = None¶

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

datacenter¶

The datacenter the node is in.

rack¶

The rack the node is in.

exception cassandra.pool. NoConnectionsAvailable[source]¶

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