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| | Supply and demand - Wikipedia, the free encyclopedia |
 | | In this context, it refers to how supply and demand change in response to various stimuli. | | | And land that otherwise would be below sea level can be kept dry by a system of dikes, which might also be regarded as a response to demand. | | | Even with downward-sloping demand curves, it is possible that an increase in income may lead to a decrease in demand for a particular good, probably due to the existence of more attractive alternatives which become affordable: a good with this property is known as an inferior good. |
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http://en.wikipedia.org/wiki/Demand
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| | IBM: On-demand computing has arrived CNET News.com |
| | On-demand computing dovetails with the utility computing idea, which has it that customers should be able to pay varying prices for computing power depending on how demand for that power waxes and wanes. | | | Palmisano chafes when IBM's on-demand idea is lumped in with utility computing, though. | | | Big Blue expects one outsourcing area of its on-demand work, in which IBM takes over components of a company's business, to be a $150 billion market in 2004 and to grow 12 percent to 14 percent each year for the next five years. |
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http://news.com.com/2100-7339-5106577.html
(1266 words)
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| | Demand Systems (805) 482-7900 |
| | At Demand Systems, we start by helping you select computers that you can rely on. | | | Whether you need help with computers, networks, or software; the friendly experts at Demand Systems have the know-how to give you peace of mind with your technology. | | | We hand pick the very best components in the computer industry, ones that are tried and true for reliability, affordability and performance. |
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http://www.demand-sys.com
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| | Developer resources for an on demand world |
| | The IBM On Demand Operating Environment is a model for running IT systems that allows you to leverage your existing technology investments and build on them to enable faster integration, automated management, and access to computing power where and when needed through virtualization. | | | On Demand Business is a model, complete with all the necessary tools, for developing enterprise-scale software. | | | The On Demand Operating Environment is built with the flexibility to allow for this. |
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http://www.ibm.com/developerworks/ondemand
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| | Demand Works - Home |
| | Demand Works solutions are now also available for the MySQL database as well as 32-bit and 64-bit Linux platforms! | | | Demand Works develops solutions for forecasting, collaborative demand and supply planning, and multi-dimensional data anaylsis. | | | Demand Works announces the general availability of Version 3.55. |
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http://www.demandworks.com
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| | Demand, by David R. Henderson: The Concise Encyclopedia of Economics: Library of Economics and Liberty |
| | Some of the modern evidence for the law of demand is from econometric studies which show that, all other things being equal, when the price of a good rises, the amount of it demanded decreases. | | | The law of demand states that when the price of a good rises, the amount demanded falls, and when the price falls, the amount demanded rises. | | | When economists refer to demand, they usually have in mind not just a single quantity demanded, but what is called a demand curve. |
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http://www.econlib.org/library/Enc/Demand.html
(987 words)
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| | IBM Redbooks Selling Solutions for On Demand Business |
| | This IBM Redbook serves as a practical reference for those who desire to understand the IBM On Demand Business strategy and how to sell effectively within it. | | | By reading this IBM Redbook, you will understand the IBM On Demand Business strategy. | | | You will be able to identify On Demand Business opportunities and target markets, as well as know how to sell solutions in line with the strategy. |
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http://www.redbooks.ibm.com/abstracts/sg246330.html?Open
(989 words)
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| | HBO on Demand - What is HBO on Demand? |
| | HBO On Demand relies on digital technology to make programming available to you. | | | Check out See What's On to find a full list of programs currently available on HBO On Demand. | | | The differences between HBO On Demand and most other kinds of video on demand is: 1) with HBO On Demand you get award-winning HBO programs, and 2) HBO On Demand is not pay-per-play; it's all you can watch for a low monthly subscription fee. |
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http://www.hbo.com/hboondemand/faq.html
(1077 words)
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| | On-Demand Architecture (SODA) - Salesforce.com |
| | The value companies experience with on-demand computing far exceeds what they can expect with traditional software. | | | Features like point-and-click customization and the best interface in the industry make it possible for anyone to create new on-demand applications. | | | The AppExchange on-demand platform is the new standard for managing and sharing information. |
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http://www.salesforce.com/products/ondemand-architecture.jsp
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| | Storage Organization and Management in TENEX |
| | Paging was therefore the logical alternative, and our study and experience with list processing systems(1,2) led us to believe that using a demand-paged virtual memory system for such computations was a feasible approach. | | | Page table entries are one word, hence a page table for a 256K virtual memory is 512 words, or exactly one page. | | | File pages are backed up to the disk by setting a request bit in the CST which causes the swapper to move the page to the disk instead of the drum. |
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http://www.opost.com/dlm/tenex/fjcc72
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| | Avoidance of deadlocks in a demand paged video adapter - Patent 5592670 |
| | The instruction that is executed by the processor may be one in which the piece of information in the first page of memory is moved to a location in the second page of memory. | | | When an instruction, like the MOVSB instruction, that requires a source byte from a source page and a destination byte from a destination page, is executed, the CPU executing the instruction does not actually read the source page until both the source page and destination page are present in physical memory. | | | Further suppose that the source page and destination page are different, and additionally suppose that, initially, the page holding the source address is not present in the page frame 68 (i.e., page frame 0) of physical memory 58. |
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http://www.freepatentsonline.com/5592670.html
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| | CSE 120 -- Nachos Project 3: Virtual Memory (Fall 2002) |
| | Demand paging and page replacement together allow your kernel to "overbook" memory by executing more processes than would fit in machine memory at any one time, using page faults to "juggle" the available physical page frames among the larger number of process virtual pages. | | | To show that you only initialize pages that are referenced on demand, write one test program that references all of the pages in memory, and a second test program that only references some of the pages. | | | For project 3, also include a discussion of the page replacement algorithm that you used, and a description of how well that page replacement algorithm worked on your test programs (e.g., the test program name, the number of pages it requires, and the faults it generated). |
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http://www-cse.ucsd.edu/classes/fa02/cse120/projects/vm.html
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| | ci215ex6 |
| | Addresses are translated through a page table in main memory, with an access time of 1 microsecond per memory access. | | | A small process is in page 0 (locations 0 to 199) for manipulating the matrix; thus, every instruction fetch will be from page 0. | | | The virtual memory is implemented by paging, and the page size is 4096 bytes. |
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http://www.inf.ufpr.br/~roberto/ci215ex6
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| | demand paging from FOLDOC |
| | Paging in a page may first require some other page to be moved from main memory to disk ("paged out") to make room. | | | A replacement algorithm or policy is used to select the page to be paged out, often this is the least recently used (LRU) algorithm. | | | If this page has not been modified since it was paged in, it can simply be reused without writing it back to disk. |
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http://wombat.doc.ic.ac.uk/foldoc/foldoc.cgi?demand+paged
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| | World Gold Council > value > research & statistics > statistics > supply and demand statistics |
| | In addition to a summary of demand information this also shows the categories of supply: mine output, net hedging or de-hedging by mining companies, scrap and net central bank sales. | | | Identifiable investment demand totalled 600 tonnes in 2005, a 26% rise on the previous year, whilst jewellery demand rose 5% (2,736 tonnes) and industrial demand by 2% (419 tonnes). | | | Data on the supply and demand for gold are compiled by GFMS Ltd. |
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http://www.gold.org/value/stats/statistics/gold_demand
(394 words)
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| | DEMAND |
| | One of the most frequently used applications in DEMAND is the DataMall. | | | Microsoft Internet Explorer 6 is the preferred browser for DEMAND to make best use of its features. | | | Questions or problems can be directed to the OIT Help Desk. |
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http://isserver11.princeton.edu:4001/demand
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| | mem_mgt.txt.htm |
| | Demand loading eliminates the need to allocate main memory to rarely accessed routines and code, such as error handling routines, which in some instances might account for a large percentage of a program's code. | | | Guaranteed page alignment is based on a loading algorithm simpler for the system to implement. | | | Pages are not loaded in memory until are "demanded" by a process-- hence the term, demand paging. |
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http://www.ozones.com/grumman/secondary/mem_mgt.txt.htm
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| | Lecture 7 - Caching and TLBs; Caching and Demand Paged Virtual Memory |
| | Demand Paging is where you only load pages from disk into memory when an address on that page is needed by the CPU. | | | The page table can have pointers to either pages that have been loaded into physical memory, or it can have pointers to pages that are still on the disk. | | | On a miss, the page table(s) are referenced and the appropriate page frame retrieved. |
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http://www-scf.usc.edu/~csci402/crowley/lect7.html
(3674 words)
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| | Archive_Memory.html |
| | Consider a computer with (non-demand) paged memory management and a word addressible memory, with 16 bits per word. | | | If the required page number is not in the TLB, then after the TLB lookup completes, the required page map table entry is read from Main Memory. | | | Optimum means the page size that minimizes the amount of memory lost to implement paging. |
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http://ei.cs.vt.edu/~cs3204/summer.95/ProblemArchive/Archive_Memory.html
(1931 words)
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| | Proceedings of the 3rd USENIX Windows NT Symposium, July 12-15, 1999, Seattle, Washington |
| | Interestingly, netscape and photoshop touch almost every code page in their main binary during startup suggesting that even with demand paging the entire application is loaded to memory from disk. | | | The binary for desktop applications is demand paged so we examine the utilization of the code pages brought in during startup. | | | Compared to paged, reordered-paged minimizes the number of pages needed by the application, effectively reducing the number of bytes transferred and the number of requests to the server that have to be made. |
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http://www.usenix.org/events/usenix-nt99/full_papers/lee/lee_html
(4191 words)
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| | Quiz 2 Answers |
| | Comment: A page needs to be swapped out of physical memory only if there were no free physical pages available for the page being swapped in. | | | Since physical page 5's first byte is at physical address 0x5000, the corresponding physical address must be 0x5100. | | | The fact that a page was swapped out means that physical memory was full at that point in time. |
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http://www.digipen.edu/~mgrove/CS180/Answers/quiz2.htm
(662 words)
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| | Proj4.doc |
| | You are to write a program to test the performance of two page replacement algorithms in a demand paged virtual memory management system. | | | For each page replacement algorithm, your program will record the page fault rate for frame allocations varying from 10% to 90% in increments of 10%. | | | If a page fault occurs, you must invoke the appropriate page replacement algorithm to choose a page to replace, update the page table, and continue. |
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http://cms.dt.uh.edu/Faculty/BerrachedA/CS4315/Projects/Proj4.doc
(900 words)
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| | week10.txt |
| | Consider a demand paged system where the page size is 512K. | | | When the page's address is in the associative memory only one memory access is required to reference an address. | | | We believe that a new page-replacement algorithm is optimal in minimis- ing the number of page faults. |
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http://www.cs.usyd.edu.au/~cs3/comp3009/tutes/week10.txt
(368 words)
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| | Citations: MachineIndependent Virtual Memory Management for Paged Uniprocessor and Multiprocessor Architectures - Rashid, Tevanian, Young, Golub, Baron, Black, Bolosky, Chew (ResearchIndex) |
| | : If the page s output reference count is nonzero, the system recovers the process by invalidating all mappings of the page, copying the contents of the page to a new page, swapping pages in the memory object, and mapping the new page to the same virtual address in the process, with writing. | | | ....occur when the required page is in memory, but the page table does not contain the required translation to the page. | | | The sources of OS overhead are different for embedded real time systems than for general purpose computing systems and this.... |
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http://citeseer.ist.psu.edu/context/67208/18629
(3066 words)
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| | ERCB: DDJ Programmer's Bookshelf December 1992 |
| | As Stone shows, paged virtual memory depends on the fact that all programs have reasonably sized working sets or "footprints;" that is, that all programs can run for a while with only discrete, page-sized bits of themselves in memory at any given time. | | | You can dereference a pointer to access a page of memory, even if that page is currently on disk; a page-fault handler within the operating system will take care of loading the page without you being aware of it. | | | Obviously, the presence of virtual memory is no more relevant to your average programmer than is, say, the presence of an instruction prefetch queue on the processor. |
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http://www.ercb.com/ddj/1992/ddj.9212.html
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| | Project 3: Virtual memory management |
| | A boolean flag per virtual page indicating whether a given virtual page of a process is resident in physical memory or on backing store. | | | If the selected page frame is currently in use and the data on the page has been modified, write the data in the page frame to backing store. | | | Locate the page for which the fault was generated on the backing store; initiate I/O to load the page into the page frame selected in the previous steps. |
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http://www.cs.ucsb.edu/~acha/courses/99/fall/project3.html
(2409 words)
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| | Oracle On Demand |
| | Oracle On Demand helps Panasonic optimize applications management, ensure high system availability (PDF) | | | With the flexibility to choose an on demand solution that best fits your needs, the benefits are the same: lower TCO, better service levels, and a clear path to your IT future. | | | Oracle On Demand (PDF) manages your IT infrastructure, software, security, service levels, and IT governance—allowing you to focus on your core business. |
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http://www.oracle.com/ondemand
(298 words)
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| | Salesforce.com Unveils On-Demand Marketplace With More Than 60 Sforce-Based Solutions - Salesforce.com |
| | An interactive ratings systems, with built-in user reviews that help customers locate the on-demand solution that best suits their needs; | | | The sforce platform makes it easy for customers, consultants and developers to create on-demand applications as well as extend the power of Salesforce.com and Supportforce. | | | AppExchange, salesforce.com's on-demand platform, allows customers and partners to build powerful new applications quickly and easily, customize and integrate the Salesforce suite to meet their unique business needs, and distribute and sell on-demand apps at http://www.salesforce.com/appexchange. |
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http://www.salesforce.com/newsevents/press-release.jsp?year=2004&month=November&id=041102-1
(707 words)
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| | MikeZintel's WebLog : Wednesday, December 08, 2004 - Posts |
| | The operating system loader creates an association between executable code in a native DLL or EXE and the process’s virtual space, and then uses demand paging system to back the virtual address space with physical memory as needed to actually execute the instructions. | | | In the case of compressed files, the physical memory backing this address space is demand paged and fully shared across all processes. | | | All memory mapped files are backed with demand paged and shared physical memory. |
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http://blogs.msdn.com/mikezintel/archive/2004/12/08.aspx
(3746 words)
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