data flow

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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 computation when all the operands are available. Data flow is one kind of data driven architecture, the other is demand driven. It is a technique for specifying parallel computation at a fine-grain level, usually in the form of two-dimensional graphs in which instructions that are available for concurrent execution are written alongside each other while those that must be executed in sequence are written one under the other. Data dependencies between instructions are indicated by directed arcs. Instructions do not reference memory since the data dependence arcs allow data to be transmitted directly from the producing instruction to the consuming one.

Data flow schemes differ chiefly in the way that they handle re-entrant code. Static schemes disallow it, dynamic schemes use either "code copying" or "tagging" at every point of reentry.

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

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.
References in periodicals archive ?
The difference is that we work with the elimination tree T(A) of the original matrix and its associated dataflow graph.
She agreed not to light up in the office but bosses at Dataflow Communications in Somerset said: "If someone is found to smoke, even in their own time, they will not work for this firm.
It has also been suggested that Dataflow is profiting from maps originally created by fire service staff.
CRC Information Systems and Aleyant Systems have furthered their partnership by holding an informational webinar which showcased the dataflow between CRC's Nucleus MIS and the Pressero web-to-print system from Aleyant.
For beginning and intermediate users, this guide to Apache Pig provides information and reference material on the use of this powerful dataflow scripting language for the Hadoop large scale database framework.
In an interim assessment of the economic outlook for OECD countries, the group said: "The most recent dataflow, including the decline in payroll employment witnessed in the first two months of 2008, suggest that the US economy is now essentially moving sideways, if not contracting outright.
Building on nearly 10 years of investment in multithreading technology, it simplifies multicore as well as FPGA-based application development with its intuitive parallel dataflow language.
Cavanagh (Santa Clara University) introduces the language elements and expressions of the Verilog hardware description language (HDL) for simulating digital systems, and explains the dataflow, behavioral, and structural modeling constructs.
Multiscale dataflow computing has immensely altered the traditional approach of a microprocessor to an assembly-line structure that processes the flow of data," said Frost & Sullivan Senior Research Analyst Swapnadeep Nayak.
Hortonworks DataFlow Webinar Replay http://hortonworks.
Providing autonomous forecasting systems to 47 African countries in order for them to receive, process and display data from the EUMETCast dataflow.
Key words: dataflow, DDBMS, query, SQL, transaction, replication.