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Group Communication System
{{Unreferenced, date=April 2021 The term Group Communication System (GCS) refers to a software platform that implements some form of group communication. Examples of group communication systems include IS-IS, Spread Toolkit, Appia framework, QuickSilver, and IBM's group services component. Message queue systems are somewhat similar. Group communication systems commonly provide specific guarantees about the total ordering of messages, such as if the sender of a message receives it back from the GCS, then it is certain that it has been delivered to all other nodes in the system. This property is useful when constructing data replication Replication in computing refers to maintaining multiple copies of data, processes, or resources to ensure consistency across redundant components. This fundamental technique spans databases, file systems, and distributed systems, serving to impro ... systems. Inter-process communication ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Software Platform
A computing platform, digital platform, or software platform is the infrastructure on which software is executed. While the individual components of a computing platform may be obfuscated under layers of abstraction, the ''summation of the required components comprise the computing platform''. Sometimes, the most relevant layer for a specific software is called a computing platform in itself to facilitate the communication, referring to the whole using only one of its attributes – i.e. using a metonymy. For example, in a single computer system, this would be the computer's architecture, operating system (OS), and runtime libraries. In the case of an application program or a computer video game, the most relevant layer is the operating system, so it can be called a platform itself (hence the term cross-platform for software that can be executed on multiple OSes, in this context). In a multi-computer system, such as in the case of offloading processing, it would encompass bo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Group Communication
Communication in small groups consists of three or more people who share a common goal and communicate collectively to achieve it. During small group communication, interdependent participants analyze data, evaluate the nature of the problem(s), decide and provide a possible solution or procedure. Additionally, small group communication provides strong feedback, unique contributions to the group as well as a critical thinking analysis and self-disclosure from each member. Small groups communicate through an interpersonal exchange process of information, feelings and active listening in both two types of small groups: primary groups and secondary groups. Group communication The first important research study of small group communication was performed in front of a live studio audience in Hollywood California by social psychologist Robert Bales and published in a series of books and articles in the early and mid 1950s .Bales, R. F. (1950). ''Interaction process analysis''. Page 33. C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IS-IS
Intermediate System to Intermediate System (IS-IS, also written ISIS) is a routing protocol designed to move information efficiently within a computer network, a group of physically connected computers or similar devices. It accomplishes this by determining the best route for data through a packet switching network. The IS-IS protocol is defined in ISO/IEC 10589:2002 as an international standard within the Open Systems Interconnection (OSI) reference design. In 2005, IS-IS was called "the ''de facto'' standard for large service provider network backbones". Description IS-IS is an interior gateway protocol, designed for use within an administrative domain or network. This is in contrast to exterior gateway protocols, primarily Border Gateway Protocol (BGP), which is used for routing between autonomous systems. IS-IS is a link-state routing protocol, operating by reliably flooding link state information throughout a network of routers. Each IS-IS router independent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spread Toolkit
The Spread Toolkit is a computer software package that provides a high performance group communication system that is resilient to faults across local and wide area networks. Spread functions as a unified message bus for distributed applications, and provides highly tuned application-level multicast, group communication, and point to point support. Spread services range from reliable messaging to fully ordered messages with delivery guarantees. The toolkit consists of a messaging server, and client libraries for many software development environments, including C/ C++ libraries (with and without thread support), a Java class to be used by applets or applications, and interfaces for Perl, Python, and Ruby. Interfaces for many other software environments have been provided by third parties. In typical operation, each computer in a cluster runs its own instance of the Spread server, and client applications connect locally to that server process. The Spread servers, in turn, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Appia (software)
Appia is a free and open-source layered communication toolkit implemented in Java, and licensed under the Apache License, version 2.0. It was born in the University of Lisbon, Portugal, by the DIALNP research group that is hosted in the LaSIGE research unit. Components Appia is composed by a core that is used to compose protocols, and a set of protocols that provide group communication, ordering guarantees, atomic broadcast, among other properties. Core The Appia core offers a clean way for the application to express inter-channel constraints. This feature is obtained as an extension to the functionality provided by current systems. Thus, Appia retains a flexible and modular design that allows communication stacks to be composed and reconfigured in run-time. Protocols The existing protocols include interface with TCP and UDP sockets, virtual synchrony, several implementations of total order, causal order, among others. See also * Protocol stack The protocol stack o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
QuickSilver (project)
The QuickSilver project at Cornell University is an AFRL-funded effort to build a platform in support of a new generation of scalable, secure, reliable distributed computing applications able to "regenerate" themselves after failure. Among the partners on this project are DARPA funding under the SRS program, the United States Air Force. Raytheon, Microsoft, IBM, and Amazon. The principal investigators are Cornell Professors Kenneth P. Birman, Johannes Gehrke Johannes Gehrke is a Technical Fellow at Microsoft focusing on AI. He is an ACM Fellow, an IEEE Fellow, and he received the 2011 IEEE Computer Society Technical Achievement Award and the 2021 ACM SIGKDD Innovation Award. From 1999 to 2015, he wa ..., and Paul Francis External links Project home pagewith links to the over 140 published papers from 1999-2006. DARPA {{compu-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Replication (computing)
Replication in computing refers to maintaining multiple copies of data, processes, or resources to ensure consistency across redundant components. This fundamental technique spans databases, file systems, and distributed systems, serving to improve availability, fault-tolerance, accessibility, and performance. Through replication, systems can continue operating when components fail ( failover), serve requests from geographically distributed locations, and balance load across multiple machines. The challenge lies in maintaining consistency between replicas while managing the fundamental tradeoffs between data consistency, system availability, and network partition tolerance – constraints known as the CAP theorem. Terminology Replication in computing can refer to: * ''Data replication'', where the same data is stored on multiple storage devices * ''Computation replication'', where the same computing task is executed many times. Computational tasks may be: ** ''Replicated in s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
