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George F. Coulouris (15 November 1937 – 18 November 2024) was a British computer scientist and the son of actor George Coulouris. He was an emeritus professor of Queen Mary, University of London and formerly visiting professor in residence at University of Cambridge Computer Laboratory. He was co-author of a textbook on distributed systems.
VirtualLogix designed embedded systems using Linux and ChorusOS (which they named VirtualLogix C5). C5 was described by them as a carrier grade operating system, and was actively maintained by them. The latest source tree of ChorusOS, an evolution of version 5.0, was released as open-source software by Sun and is available at the Sun Download ...
A computer program that runs within a distributed system is called a distributed program, [7] and distributed programming is the process of writing such programs. [8] There are many different types of implementations for the message passing mechanism, including pure HTTP, RPC-like connectors and message queues .
In distributed computing, the bully algorithm is a method for dynamically electing a coordinator or leader from a group of distributed computer processes. The process with the highest process ID number from amongst the non-failed processes is selected as the coordinator.
The Paxos consensus algorithm by Leslie Lamport, and variants of it such as Raft, are used pervasively in widely deployed distributed and cloud computing systems. These algorithms are typically synchronous, dependent on an elected leader to make progress, and tolerate only crashes and not Byzantine failures.
In a system with a central server, the synchronization solution is trivial; the server will dictate the system time. Cristian's algorithm and the Berkeley algorithm are potential solutions to the clock synchronization problem in this environment. In distributed computing, the problem takes on more complexity because a global time is not easily ...
“Distributed” or “grid” computing in general is a special type of parallel computing that relies on complete computers (with onboard CPUs, storage, power supplies, network interfaces, etc.) connected to a network (private, public or the Internet) by a conventional network interface producing commodity hardware, compared to the lower efficiency of designing and constructing a small ...
In distributed computing, a single system image (SSI) cluster is a cluster of machines that appears to be one single system. [1] [2] [3] The concept is often considered synonymous with that of a distributed operating system, [4] [5] but a single image may be presented for more limited purposes, just job scheduling for instance, which may be achieved by means of an additional layer of software ...