.. include:: vars.rst

.. _section-whats-new-700:

What's New in 7.0.0
===================

.. _section-CDS-118:

Improved steady state bandwidth utilization and discovery time in systems with many DomainParticipants communicating over lossy networks
----------------------------------------------------------------------------------------------------------------------------------------
.. CDS-118

In lossy networks, |DP| discovery could take longer if |DP| announcements forwarded
from |CDS| were dropped. In previous releases, the ``<refresh_period>`` configuration 
tag could be used to resend |DP| announcements periodically.
The tradeoff of using that parameter was that it could lead to unnecessary network
traffic on systems that had completed |DP| discovery (because the
``<refresh_period>`` mechanism continued resending indefinitely).

In this release, the ``<refresh_period>`` is replaced with a more efficient
way to resend |DP| announcements. This new mechanism resends the |DP| announcements
from |CDS| a finite number of times, spaced randomly in an interval between
a minimum and maximum value:

.. code-block:: xml

    <forwarder>
        <event>
            <new_or_update_participant_announcements>
            </new_or_update_participant_announcements>

            <min_new_or_update_participant_announcements_period>
            </min_new_or_update_participant_announcements_period>

            <max_new_or_update_participant_announcements_period>
            </max_new_or_update_participant_announcements_period>
        </event>
    </forwarder>

For additional information about these new parameters, see 
:ref:`section-config-forwarder`.

.. _section-CDS-150:

|DP_PARTITIONs_HEADING| support
-------------------------------
.. CDS-150

|CDS| supports systems that utilize |DP_PARTITIONs|. Partitioning at the |DP|
level can be particularly useful in large, WAN, distributed systems (with
thousands of participants) in which not all participants need to know about
each other at any given time.

|DP_PARTITIONs| functionality reduces network, CPU, and memory utilization,
because |DPs| without matching partitions will not exchange information about
themselves and their |DWs| and |DRs|.

|DP_PARTITIONs| support in |CDS| ensures that |CDS| doesn't forward a |DP|
announcement to |DPs| whose partition values don't match.

For details, see :ref:`section-domain-list-partitions`.

Removals
--------

domain_id_info_seq field in DatabasePeriodic type used in monitoring removed
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.. MG-114

The ``@optional sequence<DomainIdInfo> domain_id_info_seq`` field in the 
DatabasePeriodic type used for :ref:`section-cloud-discovery-service-monitoring`
and defined in ``CdsMonitoring.idl`` has been removed. 
This change was done as a part of refactoring the internal state of |CDS|. 
Refer to the *Migration Guide* 
on the `RTI Community portal <https://community.rti.com/Documentation/>`_
to see how this change could affect your upgrade to 7.0.0.

<refresh_period> tag removed
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.. MG-113

The ``<refresh_period>`` tag from previous releases has been replaced by  
new tags. (See :ref:`section-CDS-118`.) The ``<refresh_period>`` is still 
present in the XSD, 
and |CDS| logs a warning if that tag is parsed; however, the value of 
``<refresh_period>`` no longer influences the operation of |CDS|.


Third-Party Software Upgrades
-----------------------------
.. THIRDPARTY-1 (libxml2 and libxslt)

The following third-party software used by |CDS| has been upgraded:

.. list-table:: Third-Party Software Changes
    :name: ThirdPartyChanges
    :widths: 40 40 40
    :header-rows: 1

    * - Third-Party Software
      - Previous Version
      - Current Version 
    * - libxml2	
      - 2.9.12	
      - 2.9.14
    * - libxslt	
      - 1.1.34
      - 1.1.35

For information on third-party software used by |CONNEXT| products,
see the "3rdPartySoftware" documents in your installation: 
``<NDDSHOME>/doc/manuals/connext_dds_professional/release_notes_3rdparty``.