concurrency in A Sentence

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Since no one* has mentioned it: Concurrency.

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Seven Concurrency Models in Seven Weeks.

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Is“Java Concurrency In Practice” still valid?

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Although they're often confused, parallelism and Concurrency are different things.

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Or more servers, 2 or more different queues-> Concurrency and parallelism.

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Concurrency simple means more than one tasks are running(not necessary in parallel).

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Rust is a systems programming language focused on three goals: safety, speed, and Concurrency.

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Concurrency includes interactivity which cannot be compared in a better/worse sort of way with parallelism.

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Concurrency: Concurrency comes into picture when you have shared data, shared resource among the threads.

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Concurrency is when two or more tasks can start, run, and complete in overlapping time periods.

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Concurrency is the composition of independently executing processes, while parallelism is the simultaneous execution of(possibly related) computations.

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Concurrency means that an application is making progress on more than one task at the same time(concurrently).

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Concurrency can involve tasks run simultaneously or not(they can indeed be run in separate processors/cores but they can as well be run in"ticks").

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Partitioning, indexing, caching, views, OLAP cubes, and transactional systems such as write-ahead logging or multiversion Concurrency control all dramatically affect the physical organization of either system.

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In other words, Concurrency is sharing time to complete a job, it MAY take up the same time to complete its job but at least it gets started early.

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Or more servers, one Queue-> parallelism( 2 jobs done at the same instant) but no Concurrency( server is not sharing time, the 3rd job has to wait till one of the server completes.).

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Keep in mind, if the resources are shared, pure parallelism cannot be achieved, but this is where Concurrency would have it's best practical use, taking up another job that doesn't need that resource.

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Performance goals will differ depending on the system's technology and purpose, but should always include some of the following: If a system identifies end-users by some form of log-in procedure then a Concurrency goal is highly desirable.

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Server, 2 or more different queues(with 5 jobs per queue)-> Concurrency(since server is sharing time with all the 1st jobs in queues, equally or weighted), still no parallelism since at any instant, there is one and only job being serviced.

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Server, 1 job queue(with 5 jobs)-> no Concurrency, no parallelism(Only one job is being serviced to completion, the next job in the queue has to wait till the serviced job is done and there is no other server to service it).

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