Slower layer to a faster layer, Computer Engineering

Given a four level hierarchical storage system consisting of: cache,  primary storage, secondary storage, and tertiary storage. Suppose the following:  programs may be executed on any of the four levels; each level consists of the same amount of real storage and the range of addresses on each level is identical. The speed at which programs are run is grouped from slowest (tertiary storage) to fastest (cache), where each layer is 10 times faster than the previous lower layer. There exists one CPU in this system, which may run one program at a time. Programs may be shuttled from any layer to any layer.

a) Why might the operating system choose to move information from a faster level to a slower level, bypassing an intermediate level, IE. from cache to secondary  storage?

b) Why would items move from a slower layer to a faster layer?

c) Should information be allowed to move from any level to any level or should transfers only occur from adjacent levels? Explain in detail.

Posted Date: 3/15/2013 6:29:31 AM | Location : United States







Related Discussions:- Slower layer to a faster layer, Assignment Help, Ask Question on Slower layer to a faster layer, Get Answer, Expert's Help, Slower layer to a faster layer Discussions

Write discussion on Slower layer to a faster layer
Your posts are moderated
Related Questions
System Software 1. Explain language processing? Explain its activities in detail. 2. Discuss briefly about Assembler directives. Also explain about Macro definition and call

First, remember that different processes keep their own data in distinct address spaces. Threads, on the other hand, explicitly share their entire address space with one another. A

Q. (192.8)10 - (AE.E)16 = (X)8, Find value of x. Use 8's complement method. Q. Write first 10 numbers in the base 4. Q. Explain Error-Detection code & Error-correction code w

What is an I/O buffer? I/O buffer: One type of input-output requirement arises from devices which have a very high character density as disks and tapes. With these chara

Q. Illustrate Characteristic tables of flip-flops? Excitation Tables Characteristic tables of flip-flops present the subsequent state when inputs and present state are kno

The documentation rules are almost exactly the similar as for Scripts "Documenting scripts". Although from a technical point of view it is feasible to place measures in libraries i

According to the report, network 1 and network 2 are not able to reach network 3. As shown on OTBNetwork Topology above, OTB Inc. has 2 routing protocols running due transition iss

Name the appliances which are controlled by micro-processor Many household appliances which are microprocessor-controlled do not have operating systems (for example microwave o

Q. Show the Programmes for Parallel Systems? Adding elements of an array using two processor      int sum, A[ n] ;  //shared variables

Define DMA controller. The I/O device interface control circuit that is used for direct memory access is called as DMA controller.