data flow

[′dad·ə ‚flō] (communications) The route followed by a data message from its origination to its destination, including all the nodes through which it travels. (computer science) The transfer of data from an external storage device, through the processing unit and memory, and out to an external storage device.

data flow

A data flow architecture or language performs a computationwhen all the operands are available. Data flow is one kindof data driven architecture, the other is demand driven.It is a technique for specifying parallel computation at afine-grain level, usually in the form of two-dimensionalgraphs in which instructions that are available for concurrentexecution are written alongside each other while those thatmust be executed in sequence are written one under the other.Data dependencies between instructions are indicated bydirected arcs. Instructions do not reference memory since thedata dependence arcs allow data to be transmitted directlyfrom the producing instruction to the consuming one.

Data flow schemes differ chiefly in the way that they handlere-entrant code. Static schemes disallow it, dynamicschemes use either "code copying" or "tagging" at every pointof reentry.

An example of a data flow architecture is MIT's VALmachine.

data flow

(1) In computers, the path of data from source document to data entry to processing to final reports. Data changes format and sequence (within a file) as it moves from program to program.

(2) In communications, the path taken by a message from origination to destination that includes all nodes through which the data travels.

单词	data flow
释义	data flow data flow [′dad·ə ‚flō] (communications) The route followed by a data message from its origination to its destination, including all the nodes through which it travels. (computer science) The transfer of data from an external storage device, through the processing unit and memory, and out to an external storage device. data flow A data flow architecture or language performs a computationwhen all the operands are available. Data flow is one kindof data driven architecture, the other is demand driven.It is a technique for specifying parallel computation at afine-grain level, usually in the form of two-dimensionalgraphs in which instructions that are available for concurrentexecution are written alongside each other while those thatmust be executed in sequence are written one under the other.Data dependencies between instructions are indicated bydirected arcs. Instructions do not reference memory since thedata dependence arcs allow data to be transmitted directlyfrom the producing instruction to the consuming one. Data flow schemes differ chiefly in the way that they handlere-entrant code. Static schemes disallow it, dynamicschemes use either "code copying" or "tagging" at every pointof reentry. An example of a data flow architecture is MIT's VALmachine. data flow (1) In computers, the path of data from source document to data entry to processing to final reports. Data changes format and sequence (within a file) as it moves from program to program. (2) In communications, the path taken by a message from origination to destination that includes all nodes through which the data travels.
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