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The Data Distribution Service (DDS) for real-time systems is an Object Management Group (OMG) machine-to-machine (sometimes called middleware or connectivity framework) standard that aims to enable dependable, high-performance, interoperable, real-time, scalable data exchanges using a publish–subscribe pattern.
Middleware services provide a more functional set of application programming interfaces to allow an application to: Locate transparently across the network, thus providing interaction with another service or application; Filter data to make them friendly usable or public via anonymization process for privacy protection (for example)
A distributed transaction operates within a distributed environment, typically involving multiple nodes across a network depending on the location of the data.A key aspect of distributed transactions is atomicity, which ensures that the transaction is completed in its entirety or not executed at all.
Message-oriented middleware is in contrast to streaming-oriented middleware where data is communicated as a sequence of bytes with no explicit message boundaries. Note that streaming protocols are almost always built above protocols using discrete messages such as frames , datagrams , packets , cells , et al.
The duplication process is normally done at a set time after hours. This is to ensure that each distributed location has the same data. In the duplication process, users may change only the master database. This ensures that local data will not be overwritten. Both replication and duplication can keep the data current in all distributive ...
The Data Distribution Service (DDS) middleware does not use a broker in the middle. Instead, each publisher and subscriber in the pub/sub system shares meta-data about each other via IP multicast. The publisher and the subscribers cache this information locally and route messages based on the discovery of each other in the shared cognizance.
Amiga Envoy Network Inquiry Protocol 383: Yes: HP data alarm manager 384: Yes: A Remote Network Server System 387: Yes: AURP (AppleTalk Update-based Routing Protocol) [86] 388: Yes: Assigned: Unidata LDM near real-time data distribution protocol [87] [self-published source] [88] [self-published source] 389: Yes: Assigned: Lightweight Directory ...
The contents of the Real-Time Publish-Subscribe (RTPS) Protocol page were merged into Data Distribution Service. For the contribution history and old versions of the redirected page, please see its history ; for the discussion at that location, see its talk page .