While Gates enrolled at Harvard, Allen pursued a degree in computer science at Washington State University, though he later dropped out of school to work at Honeywell. Since they didn't yet have one, Allen worked on a simulator for the Altair while Gates developed the interpreter. Although they developed the interpreter on a simulator and not the actual device, it worked flawlessly when they in March demonstrated the interpreter to MITS in AlbuquerqueNew Mexico. He later invested in low-tech sectors, sports teams, and commercial real estate.
What are the benefits of designing my application as a coordination of tasks? How does Amazon SWF help me with this? In Amazon SWF, tasks represent invocations of logical steps in applications. Tasks are processed by workers which are programs that interact with Amazon SWF to get tasks, process them, and return their results.
A worker implements an application processing step. You can build workers in different programming languages and even reuse existing components to quickly create the worker.
For example, you can use cloud services, enterprise applications, legacy systems, and even simple scripts to implement workers. By independently controlling the number of workers for processing each type of task, you can control the throughput of your application efficiently.
To coordinate the application execution across workers, you write a program called the decider in your choice of programming language. The separation of processing steps and their coordination makes it possible to manage your application in a controlled manner and give you the flexibility to deploy, run, scale and update them independently.
You can choose to deploy workers and deciders either in the cloud e. Amazon EC2 or Lambda or on machines behind corporate firewalls. Because of the decoupling of workers and deciders, your business logic can be dynamic and you application can be quickly updated to accommodate new requirements.
For example, you can remove, skip, or retry tasks and create new application flows simply by changing the decider. By implementing workers and deciders, you focus on your differentiated application logic as it pertains to performing the actual processing steps and coordinating them.
Amazon SWF handles the underlying details such as storing tasks until they can be assigned, monitoring assigned tasks, and providing consistent information on their completion. Amazon SWF can be used to address many challenges that arise while building applications with distributed components.
You do not have to use databases, custom systems, or ad hoc solutions to keep execution state. Communicating and managing the flow of work between your application components.
With Amazon SWF, you do not need to design a messaging protocol or worry about lost and duplicated tasks. Centralizing the coordination of steps in your application. Your coordination logic does not have to be scattered across different components, but can be encapsulated in a single program.
Integrating a range of programs and components, including legacy systems and 3rd party cloud services, into your applications. By allowing your application flexibility in where and in what combination the application components are deployed, Amazon SWF helps you gradually migrate application components from private data centers to public cloud infrastructure without disrupting the application availability or performance.
Automating workflows that include long-running human tasks e. Amazon SWF reliably tracks the status of processing steps that run up to several days or months.
Building an application layer on top of Amazon SWF to support domain specific languages for your end users. Since Amazon SWF gives you full flexibility in choosing your programming language, you can conveniently build interpreters for specialized languages e.
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3 out of 4 adults use Internet, survey says - The Boston Globe: "The US online population has hit a record high: 73 percent of adults, or million, now use the Internet. But only 42 percent of all adults, or 84 million, have the home high-speed connections important for viewing video and treating the Internet as an always-on reference.
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