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Topic: Pipes and filters

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	[No title] (Site not responding. Last check: 2007-11-02)
		The responsibilities of a pipe component are to transfer data between filters, sometimes to buffer data or to synchronise activity between neighbouring filters.
		As all filters and pipes are active simultaneously, they accept data, operate on it in the case of filters, and send it to the next step.
		Pipes and Filters systems can degenerate to the point where they become a batch sequential system, this is each step processes all data as a single entity.
	www.cs.ucl.ac.uk /staff/J.Ortega-Arjona/patterns/PF.html (2273 words)

	SMOKESHOP 12/99 - Pipes: Filters and Filter Pipes
		ilters and filter pipes in general, according to many, are mere flotsam in the pipe smoking world.
		Retailers that ignore filters and filter pipes are missing out on a growing sales sector, according to many manufacturers and distributors I have spoken to.
		The construction of these firms’ filters are, to my eyes, largely identical: a cellophane sleeve sheaths strips of paper, of which the innermost strip contains dozens of raised (paper) baffles that trap incoming nicotine and moisture.
	www.smokeshopmag.com /1299/pipes.htm (861 words)

	CS210: Advanced Software Paradigms (Site not responding. Last check: 2007-11-02)
		Pipes and Filters is an architectural style used primarily for processing streams of data.
		An active filter is one that runs as a separate process or thread; it actively pulls data from the input data stream and pushes the transformed data onto the output data stream.
		The pipes are the connectors--between a data source and the first filter, between filters, and between the last filter and a data sink.
	www.seas.gwu.edu /~cs210/PipesAndFilters.htm (181 words)

	Pipeline (software) - Wikipedia, the free encyclopedia
		The concept is also called the pipes and filters design pattern.
		For performance, most operating systems implementing pipes use pipe buffers, which allow the source process to provide more data than the destination process is currently able or willing to receive.
		Pipes and filters can be viewed as a form of functional programming, using byte streams as data objects.
	en.wikipedia.org /wiki/Pipes_and_filters (1157 words)

	CS330 Pipes and Filters
		A filter is a Unix command that does some manipulation of the text of a file.
		In the parent process, the pipe file descriptor f_des[0] is closed and the message (the string referenced by argv[1]) is written to the pipe file descriptor f_des[1].
		In the child process, the pipe file descriptor f_des[1] is closed and pipe file descriptor f_des[0] is read to obtain the message.
	www.cs.uregina.ca /Links/class-info/330/Pipe/pipes.html (1526 words)

	SMOKESHOP 12/99 - Pipes: Filters and Filter Pipes (cont:)
		Denicool Filter Crystals from Denicotea, which are distributed by Lane Ltd., are tiny crystals placed in the bottom of a pipe bowl before filling and smoking.
		The Falcon International model is a worthy filter pipe: a cotton filter is placed in the shank and an additional dime-size filter called a Dry Ring is seated beneath the screw-on bowl.
		Pipe cleaners, sweeteners, reamers, Briar Pipe Wipe (an exclusive of Arango Cigar Co.), pipe rests and stands, pipe lighters, butane, flints, tampers, and pouches should be stocked and regularly, but gently, suggested to your customers.
	www.smokeshopmag.com /1299/pipes2.htm (1249 words)

	EIO Design Goals
		Pipes and filters, including the built-in ones, may spontaneously fail unless their specific contract says otherwise.
		A built-in pipe or filter that isn't already done and receives a failure report must itself fail with the same terminal problem, whose report it must therefore propogate.
		When composed through pipes and filters, this immediacy may be subject to the limitations imposed by these intermediaries.
	www.erights.org /elib/concurrency/eio/goals.html (1428 words)

	I/O Redirection and Pipes
		Closely related to pipes and the pipe operator is the topic of filters.
		Some filters can be used on their own (without pipes), but the true power to manipulate streams of data to the desired output comes from the combination of pipes and filters.
		This example pipes the output from the who command into the cut command, where the characters one through twelve are cut (and directed to stdout by default) while all other characters on each line are discarded.
	www.rwc.uc.edu /thomas/Intro_Unix_Text/IO_Redir_Pipes.html (2435 words)

	cs427: Firewall Pipes and Filters (Site not responding. Last check: 2007-11-02)
		Pipes and Filters architectural pattern is used for data stream processing in Linux networking, firewall, and interprocess communication mechanism.
		Filters have priority associated, so a filter with higher priority is matched first.
		The purpose of filters is to classify the packet into some class, which denotes a group of flows that consumes the same bulk resource.
	wiki.cs.uiuc.edu /cs427/Firewall+Pipes+and+Filters (2004 words)

	Pond Plumbing Information by Just Liners
		Pipes, valves and fittings are the workhorses of your pond and are readily available at most hardware stores.
		Pipes deliver water where you want it and they protect underground electric lines from deterioration or cuts from a wayward spade or other tool.
		They are used with most kinds of flexible pipe and need a stainless steel or plastic clamp to keep them secure.
	www.justliners.com /pipes.htm (683 words)

	Pipes and filters
		A pipe takes the output from one command and uses it as input to the next command.
		Commands that are used in pipelines to modify the output from other commands are being used as filters.
		Pipe the output of the long directory listing through a grep command that will only display the entries for directories in /etc.
	floppix.ccai.com /pipe.html (321 words)

	Pipeline (Unix) - Wikipedia, the free encyclopedia
		By default, the standard error streams ("stderr") of the processes in a pipeline are not passed on through the pipe; instead, they are merged and directed to the console.
		The pipe ends appear to be normal, anonymous file descriptors, except that they have no ability to seek.
		An important aspect of this, setting Unix pipes apart from other pipe implementations, is the concept of buffering: a sending program may produce 5000 bytes per second, and a receiving program may only be able to accept 100 bytes per second, but no data are lost.
	en.wikipedia.org /wiki/Pipeline_(Unix) (861 words)

	Pipes and Filters (Site not responding. Last check: 2007-11-02)
		The output of filter 2 must be compatible with the input of the sink.
		Consequently, the series configuration of filter 1 and filter 2 is functionally equivalent to a single filter that implements the composition of the two transfer functions (filter 12 in the figure).
		Filters that implement simple transformations typically encapsulate fewer assumptions about the problem they are solving than filters that implement complex transformations.
	msdn2.microsoft.com /en-us/library/ms978599.aspx (2163 words)

	Pipes -- powerful and elegant programming paradigm
		Pipes appeared in Unix in 1972, well after the PDP-11 version of the system was in operation, at the suggestion (or perhaps insistence) of M. McIlroy, a long-time advocate of the non-hierarchical control flow that characterizes coroutines.
		The pipe notation using `<' and `>' survived only a couple of months; it was replaced by the present one that uses a unique operator to separate components of a pipeline.
		Pipes are elegant implementation of coroutines on OS shell level and as such they allow the output from one program to be fed as input to another program.
	www.softpanorama.org /Scripting/pipes.shtml (4542 words)

	ITworld.com - Implementing filters and pipes
		A filter is a program that accepts input, transforms it, and outputs the transformed data.
		Filters are closely associated with several ideas basic to Unix: standard input, standard output, input/output redirection, and pipes.
		The combination of filters and pipes is very powerful; you can use these tools to break down tasks and pick the best approach for each one.
	www.itworld.com /Comp/3380/UIR001122filters (1859 words)

	Enterprise Integration Patterns - Pipes and Filters
		Use the Pipes and Filters architectural style to divide a larger processing task into a sequence of smaller, independent processing steps (Filters) that are connected by channels (Pipes).
		Each filter exposes a very simple interface: it receives messages on the inbound pipe, processes the message, and publishes the results to the outbound pipe.
		The connection between filter and pipe is sometimes called port.
	www.enterpriseintegrationpatterns.com /PipesAndFilters.html (342 words)

	Unix Filters Definition (Site not responding. Last check: 2007-11-02)
		A filter is a small and (usually) specialized program in Unix-like operating systems that transforms plain text (i.e., human readable) data in some meaningful way and that can be used together with other filters and pipes to form a series of operations that produces highly specific results.
		Numerous filters are included on Unix-like systems, a few of which are awk, cat, comm, csplit, cut, diff, expand, fold, grep, head, join, less, more, paste, sed, sort, spell, tail, tr, unexpand, uniq and wc.
		The ls command lists the contents of /sbin and pipes its output (using the pipe operator, which is designated by the vertical bar character) to the filter grep, which searches for all files and directories that contain the letter sequence mk in their names.
	www.bellevuelinux.org /filters.html (580 words)

	Chapter Two: Architectural Styles
		The connectors that transmits the output stream from one filter to the input stream of another are called pipes.
		The filters must not share states with other filters and also they must not know the identity of their input or output streams which would restrict the input and make the output predictable.
		The last one is typed pipes which require that the data passed between two filters have a well-defined type.
	cs.allegheny.edu /wiki/cs290F2002/26 (2067 words)

	Intro to Unix: Pipes and Filters
		However, the pipe is different because it is used to pass the output of a command to another command, not a file.
		I used the cat command to display basket.txt and then send that output through a pipe to awk, but this time appending the characters HAS: to the start of every ouput line followed by the second word on each line in basket.txt, considering = as the separator between words on a line in basket.txt.
		Try using combinations of the pipe symbol, cat, grep, awk, and sed commands to manipulate its contents.
	www.december.com /unix/tutor/pipesfilters.html (747 words)

	Pipes and Filters Architecture Implemented in PERL (Site not responding. Last check: 2007-11-02)
		Using a Linux cluster and the pipeline model with filters capable of parallel processing, we see significant performance increases (linear increase up to around 25 CPU's).
		Concrete Filter - This is a class that implements a transformRecord() method.
		Additionally, the source attribute represents either another concrete filter object or a concrete source object.
	www.swcp.com /~breadfan/filters/filters.html (484 words)

	Intro to Unix: Assignment--Pipes and Filters
		The purpose of this assignment is to demonstrate your ability to use Unix pipes and filters.
		Write your Unix pipes and filters to accomplish these tasks in a general way so that it would work on any data file of the same format but different contents.
		Write Unix pipes and filters to accomplish these tasks on a file in your working directory called inventory.dat which is of the format described above.
	www.december.com /unix/tutor/asg.inventory.html (1325 words)

	Purging the process
		Pipes are created as a means of taking the output of one program and using it as the input to another.
		On the right side of that pipe, the output is used as standard input to a
		Pipes and redirection can be combined to create very powerful tools that start a text stream and then apply different tools to that stream, filtering it as it passes through different processes.
	www.kingcomputerservices.com /unix_101/purging_the_process.htm (1413 words)

	sa98_3
		Run pipes and filters until no more computations are possible.
		Filters do not know the identity of their upstream or downstream filters.
		Restrict the topologies to linear sequence of filters.
	www.cit.gu.edu.au /~francis/SA98/sa98_3.html (587 words)

	Linux.com \| Pipes and filters
		A pipe is a means by which the output from one process becomes the input to a second.
		A pipe can pass the standard output of one operation to the standard input of another, but a filter can modify the stream.
		A filter takes the standard input, does something useful with it, and then returns it as a standard output.
	applications.linux.com /applications/05/06/14/1635208.shtml?tid=47 (948 words)

	SE-380 Project 2: Applying an Architectural Style: Pipes and Filters
		The purpose of this project is to learn about and apply a particular architectural style, pipes and filters, to a familiar problem, the completely indexed dictionary (CID) problem.
		This report should be a stand-alone summary of all your work on the project that does not rely on references to the prior report.
		A discussion of the actual vs. anticipated benefits and disadvantages of the pipe and filter style.
	people.msoe.edu /~durant/courses/se380/project2.shtml (1032 words)

	Pipes-and-Filters/Repository Architecture
		This filter will use the Symbol Table repository to parse the input as per the key terms.
		This output is piped through as input to the Semantic Analysis filter that, using the Core Model reference repository, creates the Reflection Model, its output.
		Any two filters can find themselves at the ends of a pipe, provided they agree on the data structure that is being transmitted between them.
	pages.infinit.net /vincevu/ArchSpec.htm (659 words)

	Lab Assignment--Pipes (Site not responding. Last check: 2007-11-02)
		Try out some pipes and filters on the command line.
		Pipes provide the user with a synchronized means of interprocess communication.
		% pipes %cat newfile.txt This is an example file testing the use of grep and sed.
	www.cs.uregina.ca /Links/class-info/330/Pipe/pipe_asgn.html (158 words)

	CS635: Doc 18, Pipes Filters and Broker
		Output of one filter is the input of the next filter
		Pipes - connect the data source, filters and data sink
		Active Filter – pulls data from input and pushes data down the pipeline
	www.eli.sdsu.edu /courses/spring04/cs635/notes/pipes/pipes.html (1148 words)

	Pipes/Jets/filters OHH MY !! - Forums
		I dont even know were to start with all this, its like if you buy a pipe then you need to jet, if you jst use a KandN then your ok, but here is the deal....
		After I put my FMF pipe on it gave me way more acceleration but now it's blowing a little smoke.
		Aftermarket pipes will aslo save alot of weight which most of the time is a good thing.
	www.texasatvs.com /forums/showthread.php?t=14087 (303 words)

	STSC CrossTalk - Software Architecture as a Combination of Patterns - Oct 2003 (Site not responding. Last check: 2007-11-02)
		The problem is how to fit both the Layers pattern and the Pipes and Filters pattern into the architecture.
		Using Pipes and Filters directly on the application would make those application components that represent the filters aware of each other.
		The solution was to put data storage components that work as buffers between the different applications - that is, the pipes in the Pipes and Filters pattern - in the support layer.
	www.stsc.hill.af.mil /crosstalk/2003/10/0310Petersson.html (2709 words)

	Design Berlin Pipes (Site not responding. Last check: 2007-11-02)
		Noted for their intricately carved bowls and smooth smoking qualities, the Design Berlin pipes are eagerly sought after in Europe.
		This superb German Pipe is gracefully shaped from fine briar, artfully sandblasted and accented with polished briar band and bowl rim.
		inch bored filter adapter- or with the adapter removed - smoked with a 9mm filter.
	www.premierpipes.com /berlin.htm (497 words)

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