Sending Large Data

Use these QoS fields to optimize the process of sending large data.

Use these QoS fields to optimize the process of sending large data.

This includes QoS which help to reduce the number of copies needed and manage fragmentation.

See Sending Large Data, in the Core Libraries User's Manual, for more information.

Basic Settings

DDS_DataRepresentationQosPolicy	compression_settings
	<<basic>> <<extension>> Structure that contains the compression settings.

Advanced Settings

DDS_CompressionSettings_t	compression_ids
	<<extension>> Mask that represents the compression algorithms enabled.
DDS_CompressionSettings_t	writer_compression_level
	<<extension>> The level of compression to use when compressing data.
DDS_CompressionSettings_t	writer_compression_threshold
	<<extension>> The threshold, in bytes, above which a serialized sample will be eligible to be compressed.
DDS_DataReaderResourceLimitsQosPolicy	disable_fragmentation_support
	[DEPRECATED] <<extension>> Determines whether the DDSDataReader can receive fragmented samples.
DDS_DataReaderResourceLimitsQosPolicy	max_fragmented_samples
	<<extension>> The maximum number of samples for which the DDSDataReader may store fragments at a given point in time.
DDS_DataReaderResourceLimitsQosPolicy	initial_fragmented_samples
	<<extension>> The initial number of samples for which a DDSDataReader may store fragments.
DDS_DataReaderResourceLimitsQosPolicy	max_fragmented_samples_per_remote_writer
	<<extension>> The maximum number of samples per remote writer for which a DDSDataReader may store fragments.
DDS_DataReaderResourceLimitsQosPolicy	max_fragments_per_sample
	<<extension>> Maximum number of fragments for a single sample.
DDS_DataReaderResourceLimitsQosPolicy	dynamically_allocate_fragmented_samples
	<<extension>> Determines whether the DDSDataReader pre-allocates storage for storing fragmented samples.
DDS_DataReaderResourceLimitsQosPolicy	shmem_ref_transfer_mode_attached_segment_allocation
	<<extension>> Allocation resource for the shared memory segments attached by the DDSDataReader.
DDS_DataWriterResourceLimitsQosPolicy	writer_loaned_sample_allocation
	<<extension>> Represents the allocation settings of loaned samples managed by a DDSDataWriter.
DDS_DataWriterResourceLimitsQosPolicy	initialize_writer_loaned_sample
	<<extension>> Whether or not to initialize loaned samples returned by a DDSDataWriter
DDS_DataWriterTransferModeQosPolicy	shmem_ref_settings
	<<extension>> Settings related to transferring data using shared memory references.
DDS_DomainParticipantResourceLimitsQosPolicy	shmem_ref_transfer_mode_max_segments
	<<extension>> Maximum number of segments created by all DataWriters belonging to a DDSDomainParticipant.
DDS_DiscoveryConfigQosPolicy	endpoint_type_object_lb_serialization_threshold
	<<extension>> Option to reduce the size required to propagate a TypeObject in Simple Endpoint Discovery
DDS_BuiltinTopicReaderResourceLimits_t	disable_fragmentation_support
	[DEPRECATED] <<extension>> Determines whether the built-in topic DDSDataReader can receive fragmented samples.
DDS_BuiltinTopicReaderResourceLimits_t	max_fragmented_samples
	<<extension>> The maximum number of samples for which the built-in topic DDSDataReader may store fragments at a given point in time.
DDS_BuiltinTopicReaderResourceLimits_t	initial_fragmented_samples
	<<extension>> The initial number of samples for which a built-in topic DDSDataReader may store fragments.
DDS_BuiltinTopicReaderResourceLimits_t	max_fragmented_samples_per_remote_writer
	<<extension>> The maximum number of samples per remote writer for which a built-in topic DDSDataReader may store fragments.
DDS_BuiltinTopicReaderResourceLimits_t	max_fragments_per_sample
	<<extension>> Maximum number of fragments for a single sample.
DDS_BuiltinTopicReaderResourceLimits_t	dynamically_allocate_fragmented_samples
	<<extension>> Determines whether the built-in topic DDSDataReader pre-allocates storage for storing fragmented samples.