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A vector clock of a system of N processes is an array/vector of N logical clocks, one clock per process; a local "largest possible values" copy of the global clock-array is kept in each process. Denote V C i {\displaystyle VC_{i}} as the vector clock maintained by process i {\displaystyle i} , the clock updates proceed as follows: [ 1 ]
Some noteworthy logical clock algorithms are: Lamport timestamps, which are monotonically increasing software counters. Vector clocks, that allow for partial ordering of events in a distributed system. Version vectors, order replicas, according to updates, in an optimistic replicated system.
The Lamport timestamp algorithm is a simple logical clock algorithm used to determine the order of events in a distributed computer system.As different nodes or processes will typically not be perfectly synchronized, this algorithm is used to provide a partial ordering of events with minimal overhead, and conceptually provide a starting point for the more advanced vector clock method.
The most used clock synchronization solution on the Internet is the Network Time Protocol (NTP) which is a layered client-server architecture based on User Datagram Protocol (UDP) message passing. Lamport timestamps and vector clocks are concepts of the logical clock in distributed computing.
A matrix clock is a mechanism for capturing chronological and causal relationships in a distributed system. Matrix clocks are a generalization of the notion of vector clocks . [ 1 ] A matrix clock maintains a vector of the vector clocks for each communicating host.
Pages in category "Logical clock algorithms" The following 6 pages are in this category, out of 6 total. ... Vector clock; Version vector This page was ...
A vector clock is a software component (or a protocol) to assign unique timestamps to messages. Therefore it is a logical clock that allows to put the events in a distributed system in a causal order based on their time stamps (bring into order). Additionally it allows to identify the concurrency of events.
Leslie B. Lamport (born February 7, 1941) is an American computer scientist and mathematician.Lamport is best known for his seminal work in distributed systems, and as the initial developer of the document preparation system LaTeX and the author of its first manual.