Module policies

This module holds policies, which are entities that allow configuring the driver’s behaviour in various aspects. The common feature of all policies is that users can implement a policy on their own (because they simply need to implement a certain trait), allowing flexible customizability of the driver.

This includes:

• HostFilter, which is a way to filter out some nodes and thus not contact them at all on any condition.
• AddressTranslator, which allows contacting a node through a different address than its broadcast address (e.g., when it’s behind a NAT).
• LoadBalancingPolicy, which decides which nodes and shards to contact for each request.
• SpeculativeExecutionPolicy, which decides if the driver will send speculative requests to the next hosts when the current host takes too long to respond.
• RetryPolicy, which decides whether and how to retry a request.
• TODO

Modules

address_translator

host_filter

Host filters.

load_balancing

Load balancing configurations
Session can use any load balancing policy which implements the LoadBalancingPolicy trait
See the book for more information

retry

speculative_execution

timestamp_generator