3. What’s New in 7.3.0 LTS

This section describes new features in Connext 7.3.0 LTS, compared to 7.2.0. For information on new features in releases 7.0.0, 7.1.0, and 7.2.0, which are all also part of 7.3.0 LTS, see Previous Releases.

3.1. Performance improvement for durable writer history and Persistence Service with high late-joiner activity

You may have experienced performance degradation while using durable writer history and Persistence Service, particularly in scenarios with high late-joiner activity. This problem was due to the durable DataWriter not caching repair samples in the durable writer history, leading to excessive database queries from the different late-joiners. Connext now caches repair samples if the cache has sufficient capacity (writer_qos.resource_limits.max_samples is less than or equal to writer_qos.durability.storage_settings.writer_instance_cache_allocation.max_count).

3.2. Ability to filter by related source GUID using new <propagate_related_source_guid> tag

This release introduces a new tag called <propagate_related_source_guid> under <persistence_group> that allows propagating and storing the related source GUID associated with the incoming samples to Persistence Service. Propagating the related source GUID makes it possible for a DataReader receiving samples from Persistence Service to create a ContentFilteredTopic on this field.

See Creating Persistence Groups for information on the new tag. See SQL Filter Expression Notation for information on filtering metadata.