Instance Lifecycle

QoS that control the lifecycle of instances.

QoS that control the lifecycle of instances.

Use these QoS fields to configure how RTI Connext manages instance lifecycles and resources in the DataReader and DataWriter queues.

Basic Settings

dds::core::policy::ResourceLimits	max_instances
	<<basic>> <<spec>> Represents the maximum number of instances a dds::pub::DataWriter (or dds::sub::DataReader) can manage.
dds::core::policy::ResourceLimits	initial_instances
	<<basic>> <<extension>> Represents the initial number of instances a dds::pub::DataWriter (or dds::sub::DataReader) will manage.

Advanced Settings

dds::core::policy::DurabilityService	service_cleanup_delay
	<<spec>> Controls when the service is able to remove all information regarding a data instances.
dds::core::policy::DurabilityService	max_instances
	<<spec>> Part of resource limits QoS policy to apply when feeding a late joiner.
dds::core::policy::DurabilityService	max_samples_per_instance
	<<spec>> Part of resource limits QoS policy to apply when feeding a late joiner.
dds::core::policy::Reliability	instance_state_consistency_kind
	<<extension>> Whether instance state consistency is enabled
dds::core::policy::ResourceLimits	max_samples_per_instance
	<<spec>> Represents the maximum number of samples of any one instance a dds::pub::DataWriter (or dds::sub::DataReader) can manage.
dds::core::policy::ResourceLimits	instance_hash_buckets
	[DEPRECATED] <<extension>> Number of hash buckets for instances.
dds::core::policy::WriterDataLifecycle	autodispose_unregistered_instances
	<<spec>> Boolean flag that controls whether or not a writer will also dispose of an instance when the dds::pub::DataWriter unregisters from the instance by means of the unregister operations.
dds::core::policy::WriterDataLifecycle	autopurge_unregistered_instances_delay
	<<extension>> Maximum duration for which the dds::pub::DataWriter will maintain information regarding an instance once it has unregistered the instance.
dds::core::policy::WriterDataLifecycle	autopurge_disposed_instances_delay
	<<extension>> Maximum duration for which the dds::pub::DataWriter will maintain information regarding an instance once it has disposed the instance.
dds::core::policy::ReaderDataLifecycle	autopurge_nowriter_samples_delay
	<<spec>> Minimum duration for which the dds::sub::DataReader will maintain samples for an instance once its instance_state becomes dds::sub::status::InstanceState::not_alive_no_writers().
dds::core::policy::ReaderDataLifecycle	autopurge_disposed_samples_delay
	<<spec>> Minimum duration for which the dds::sub::DataReader will maintain samples for an instance once its instance_state becomes dds::sub::status::InstanceState::not_alive_disposed().
dds::core::policy::ReaderDataLifecycle	autopurge_disposed_instances_delay
	<<extension>> Minimum duration for which the dds::sub::DataReader will maintain information about a received instance once its instance_state becomes dds::sub::status::InstanceState::not_alive_disposed() and there are no samples for the instance in the DataReader queue.
dds::core::policy::ReaderDataLifecycle	autopurge_nowriter_instances_delay
	<<extension>> Minimum duration for which the dds::sub::DataReader will maintain information about a received instance once its instance_state becomes dds::sub::status::InstanceState::not_alive_no_writers() and there are no samples for the instance in the DataReader queue.
rti::core::policy::DataReaderResourceLimits	max_total_instances
	<<extension>> Maximum number of instances for which a DataReader will keep state.
rti::core::policy::DataReaderResourceLimits	keep_minimum_state_for_instances
	<<extension>> Whether or not keep a minimum instance state for up to rti::core::policy::DataReaderResourceLimits::max_total_instances.
rti::core::policy::DataReaderResourceLimits	instance_replacement
	<<extension>> Sets the kind of instances allowed to be replaced for each instance state (dds::sub::status::InstanceState) when a DataReader reaches dds::core::policy::ResourceLimits::max_instances.
rti::core::policy::DataReaderResourceLimits	autopurge_remote_not_alive_writer_delay
	<<extension>> Maximum duration for which the dds::sub::DataReader will maintain information regarding a dds::pub::DataWriter once the dds::pub::DataWriter has become not alive.
rti::core::policy::DataWriterResourceLimits	instance_replacement
	<<extension>> Sets the kinds of instances allowed to be replaced when instance resource limits are reached.
rti::core::policy::DataWriterResourceLimits	replace_empty_instances
	<<extension>> Whether or not to replace empty instances during instance replacement
rti::core::policy::DataWriterResourceLimits	autoregister_instances
	[DEPRECATED] <<extension>> Whether or not to automatically register new instances
rti::core::policy::DataReaderProtocol	propagate_dispose_of_unregistered_instances
	<<extension>> Indicates whether or not an instance can move to the dds::sub::status::InstanceState::not_alive_disposed() state without being in the dds::sub::status::InstanceState::alive() state.
rti::core::policy::DataReaderProtocol	propagate_unregister_of_disposed_instances
	<<extension>> Indicates whether or not an instance can move to the dds::sub::status::InstanceState::not_alive_no_writers() state directly from the dds::sub::status::InstanceState::not_alive_disposed().
rti::core::policy::DataWriterProtocol	disable_inline_keyhash
	<<extension>> Controls whether or not a keyhash is propagated on the wire with each sample.
rti::core::policy::DataWriterProtocol	serialize_key_with_dispose
	<<extension>> Controls whether or not the serialized key is propagated on the wire with dispose samples.
rti::core::policy::DiscoveryConfig	publication_writer_data_lifecycle
	<<extension>> Writer data lifecycle settings for a built-in publication writer.
rti::core::policy::DiscoveryConfig	subscription_writer_data_lifecycle
	<<extension>> Writer data lifecycle settings for a built-in subscription writer.
rti::core::policy::DiscoveryConfig	service_request_writer_data_lifecycle
	<<extension>> Writer data lifecycle settings for a built-in rti::topic::ServiceRequest writer.
rti::core::policy::DiscoveryConfig	participant_configuration_writer_data_lifecycle
	<<extension>> Writer data lifecycle settings for a built-in participant configuration writer.