Basic QoS

QoS that are considered basic and fundamental to RTI Connext.

QoS that are considered basic and fundamental to RTI Connext.

This page lists all QoS that are considered Basic. Basic QoS are applicable to many different use cases, are widely applicable to almost any customer, and should be relatively easy to understand and set.

These are QoS policies and fields that you should be aware of even if you are not setting them today. These QoS are fundamental to DDS and to RTI Connext, and showcase RTI Connext capabilities and features.

All other Qos are applicable to a smaller subset of use cases and customers, or are finer-grained controls for a Basic QoS.

dds::core::policy::Durability	kind
	<<basic>> <<spec>> The kind of durability.
dds::core::policy::Durability	writer_depth
	<<basic>> <<extension>> Indicates the number of samples per instance that a durable dds::pub::DataWriter will send to a late-joining dds::sub::DataReader.
dds::core::policy::DataRepresentation	compression_settings
	<<basic>> <<extension>> Structure that contains the compression settings.
dds::core::policy::Deadline	period
	<<basic>> <<spec>> Duration of the deadline period.
dds::core::policy::Ownership	kind
	<<basic>> <<spec>> The kind of ownership
dds::core::policy::OwnershipStrength	value
	<<basic>> <<spec>> The strength value used to arbitrate among multiple writers.
dds::core::policy::Liveliness	kind
	<<basic>> <<spec>> The kind of liveliness desired.
dds::core::policy::Liveliness	lease_duration
	<<basic>> <<spec>> The duration within which a dds::pub::DataWriter must be asserted, or else it is assumed to be not alive.
dds::core::policy::Liveliness	assertions_per_lease_duration
	<<basic>> <<extension>> The number of assertions a dds::pub::DataWriter will send during a its dds::core::policy::Liveliness::lease_duration.
dds::core::policy::TimeBasedFilter	minimum_separation
	<<basic>> <<spec>> The minimum separation duration between subsequent samples.
dds::core::policy::Partition	name
	<<basic>> <<spec>> A list of partition names
dds::core::policy::Reliability	kind
	<<basic>> <<spec>> Kind of reliability.
dds::core::policy::Reliability	max_blocking_time
	<<basic>> <<spec>> The maximum time a DataWriter can block on a write() call.
dds::core::policy::DestinationOrder	kind
	<<basic>> <<spec>> Specifies the desired kind of destination order.
dds::core::policy::History	kind
	<<basic>> <<spec>> Specifies the kind of history to be kept.
dds::core::policy::History	depth
	<<basic>> <<spec>> Specifies the number of samples per instance to be kept, when the kind is dds::core::policy::HistoryKind::KEEP_LAST
dds::core::policy::ResourceLimits	max_samples
	<<basic>> <<spec>> Represents the maximum samples the middleware can store for any one dds::pub::DataWriter (or dds::sub::DataReader).
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_samples
	<<basic>> <<extension>> Represents the initial samples the middleware will store for any one dds::pub::DataWriter (or dds::sub::DataReader).
dds::core::policy::ResourceLimits	initial_instances
	<<basic>> <<extension>> Represents the initial number of instances a dds::pub::DataWriter (or dds::sub::DataReader) will manage.
dds::core::policy::EntityFactory	autoenable_created_entities
	<<basic>> <<spec>> Specifies whether the entity acting as a factory automatically enables the instances it creates.
dds::core::policy::Lifespan	duration
	<<basic>> <<spec>> Maximum duration for the data's validity.
rti::core::policy::PublishMode	kind
	<<basic>> <<extension>> Publishing mode
rti::core::policy::WireProtocol	participant_id
	<<basic>> <<extension>> A value used to distinguish among different participants belonging to the same domain on the same host.
rti::core::policy::TransportBuiltin	mask
	<<basic>> <<extension>> Specifies the built-in transports that are registered automatically when the dds::domain::DomainParticipant is enabled.
rti::core::policy::TransportMulticast	value
	<<basic>> <<extension>> A sequence of multicast communications settings.
rti::core::policy::Discovery	initial_peers
	<<basic>> <<extension>> Determines the initial list of peers that will be contacted by the Discovery mechanism to send announcements about the presence of this participant.
rti::core::policy::Discovery	multicast_receive_addresses
	<<basic>> <<extension>> Specifies the multicast group addresses on which discovery-related meta-traffic can be received by the DomainParticipant.
rti::core::policy::Discovery	accept_unknown_peers
	<<basic>> <<extension>> Whether to accept a new participant that is not in the initial peers list.
rti::core::policy::DiscoveryConfig	participant_liveliness_lease_duration
	<<basic>> <<extension>> The liveliness lease duration for the participant.
rti::core::policy::DiscoveryConfig	participant_liveliness_assert_period
	<<basic>> <<extension>> The period to assert liveliness for the participant.
rti::core::policy::DiscoveryConfig	participant_announcement_period
	<<basic>> <<extension>> The period at which a participant announces itself to potential peers when using the Simple Participant Discovery Protocol 2.0 (SPDP2).
rti::core::policy::DiscoveryConfig	initial_participant_announcements
	<<basic>> <<extension>> The number of initial announcements sent when a participant is first enabled.
rti::core::policy::DiscoveryConfig	new_remote_participant_announcements
	<<basic>> <<extension>> The number of participant announcements sent when a remote participant is newly discovered.
rti::core::policy::DiscoveryConfig	min_initial_participant_announcement_period
	<<basic>> <<extension>> The minimum period between initial announcements when a participant is first enabled or when a remote participant is newly discovered.
rti::core::policy::DiscoveryConfig	max_initial_participant_announcement_period
	<<basic>> <<extension>> The maximum period between initial announcements when a participant is first enabled or when a remote participant is newly discovered.
rti::core::policy::RtpsReliableWriterProtocol	heartbeat_period
	<<basic>> <<extension>> The period at which to send heartbeats.
rti::core::policy::RtpsReliableWriterProtocol	fast_heartbeat_period
	<<basic>> <<extension>> An alternative heartbeat period used when a reliable writer needs to flush its unacknowledged samples more quickly.
rti::core::policy::RtpsReliableWriterProtocol	late_joiner_heartbeat_period
	<<basic>> <<extension>> An alternative heartbeat period used when a reliable reader joins late and needs to be caught up on cached samples of a reliable writer more quickly than the normal heartbeat rate.
rti::core::policy::RtpsReliableWriterProtocol	min_send_window_size
	<<basic>> <<extension>> Minimum size of send window of unacknowledged samples
rti::core::policy::RtpsReliableWriterProtocol	max_send_window_size
	<<basic>> <<extension>> Maximum size of send window of unacknowledged samples
rti::core::policy::Property	value
	<<basic>> <<extension>> Sequence of properties.
rti::core::policy::EntityName	name
	<<basic>> <<extension>> The name of the entity.
rti::core::policy::Batch	enable
	<<basic>> <<extension>> Specifies whether or not batching is enabled.
rti::core::policy::Batch	max_data_bytes
	<<basic>> <<extension>> The maximum cumulative length of all serialized samples in a batch.
rti::core::policy::Batch	max_samples
	<<basic>> <<extension>> The maximum number of samples in a batch.
rti::core::QosProviderParams	string_profile
	<<basic>> <<extension>> Sequence of strings containing a XML document to load.
rti::core::QosProviderParams	url_profile
	<<basic>> <<extension>> Sequence of URL groups containing a set of XML documents to load.
rti::core::QosProviderParams	ignore_user_profile
	<<basic>> <<extension>> Ignores the file USER_QOS_PROFILES.xml in the current working directory.
rti::core::QosProviderParams	ignore_environment_profile
	<<basic>> <<extension>> Ignores the value of the NDDS_QOS_PROFILES.
rti::core::QosProviderParams	ignore_resource_profile
	<<basic>> <<extension>> Ignores the file NDDS_QOS_PROFILES.xml.
rti::config::Logger	verbosity
	<<basic>> <<extension>> The verbosities at which RTI Connext diagnostic information is logged.
rti::config::Logger	category
	<<basic>> <<extension>> Categories of logged messages.
rti::config::Logger	output_file
	<<basic>> <<extension>> Specifies the file to which log messages will be redirected to.
rti::config::Logger	output_file_suffix
	<<basic>> <<extension>> Sets the file suffix when logging to a set of files
rti::core::MonitoringEventDistributionSettings	publication_period
	<<basic>> <<extension>> Period at which the event metric thread publishes the event metrics that have changed since the last time they were published.
rti::core::MonitoringPeriodicDistributionSettings	polling_period
	<<basic>> <<extension>> Period at which the periodic metric thread polls and publishes the periodic metrics.
rti::core::MonitoringLoggingDistributionSettings	max_historical_logs
	<<basic>> <<extension>> The number of log messages that RTI Monitoring Library 2.0 will keep as history.
rti::core::MonitoringLoggingDistributionSettings	publication_period
	<<basic>> <<extension>> Period at which the logging thread publishes log messages.
rti::core::MonitoringDedicatedParticipantSettings	enable
	<<basic>> <<extension>> Enables the use of a dedicated dds::domain::DomainParticipant to distribute the RTI Connext application telemetry data.
rti::core::MonitoringDedicatedParticipantSettings	domain_id
	<<basic>> <<extension>> The domain ID used in the creation of RTI Monitoring Library 2.0 dds::domain::DomainParticipant.
rti::core::MonitoringDedicatedParticipantSettings	collector_initial_peers
	<<basic>> <<extension>> Determines the initial list of peers that the discovery process will contact to send announcements about the presence of the rti::core::MonitoringDistributionSettings::dedicated_participant.
rti::core::MonitoringLoggingForwardingSettings	middleware_forwarding_level
	<<basic>> <<extension>> Log messages with rti::config::LogFacility::middleware and a log level more verbose than this value will not be distributed by RTI Monitoring Library 2.0.
rti::core::MonitoringLoggingForwardingSettings	security_event_forwarding_level
	<<basic>> <<extension>> Log messages with rti::config::LogFacility::security_event and a log level more verbose than this value will not be distributed by RTI Monitoring Library 2.0.
rti::core::MonitoringLoggingForwardingSettings	service_forwarding_level
	<<basic>> <<extension>> Log messages with rti::config::LogFacility::service and a log level more verbose than this value will not be distributed by RTI Monitoring Library 2.0.
rti::core::MonitoringLoggingForwardingSettings	user_forwarding_level
	<<basic>> <<extension>> Log messages with rti::config::LogFacility::user and a log level more verbose than this value will not be distributed by RTI Monitoring Library 2.0.
rti::core::MonitoringTelemetryData	metrics
	<<basic>> <<extension>> Sequence of rti::core::MonitoringMetricSelection containing the event and periodic metrics that will be collected and distributed for a given set of observable resources.
rti::core::MonitoringTelemetryData	logs
	<<basic>> <<extension>> rti::core::MonitoringLoggingForwardingSettings containing the rti::config::SyslogVerbosity levels that will be forwarded for the different rti::config::LogFacility.
rti::core::policy::Monitoring	enable
	<<basic>> <<extension>> Enables the collection and distribution of telemetry data for an RTI Connext application using RTI Monitoring Library 2.0.
rti::core::policy::Monitoring	application_name
	<<basic>> <<extension>> The name of the resource that represents this RTI Connext application.
rti::core::policy::TopicQueryDispatch	publication_period
	<<basic>> <<extension>> Sets the periodic interval at which samples are published.