Q. Explain about Spooling?

• Acronym for simultaneous peripheral operations on line. Spooling denotes to putting jobs in a buffer, a special area in memory or on a disk where a device can access them whenever it is ready.

• Spooling is useful since device access data at different rates. Buffer offers a waiting station where data can rest while slower device catches up. Fig below displays the spooling.

• Computer can perform I/O in parallel with computation, it becomes possible to have the computer read a deck of cards to adrum, tape or disk and to write out to tape printer while it was computing. This process is known as spooling.

• The most common spooling application is print spooling. In print spooling documents are loaded in a buffer and then printer pulls them off the buffer at its own rate.

• Spooling is used for processing data at remote sites also. CPU transmits the data through communications path to a remote printer. Spooling overlaps I/O of one job with computation of other jobs.

• One difficulty with simple batch systems is that computer still requires to read the decks of cards before it can begin to execute the job. This means that CPU is idle at the time of these relatively slow operations.

• Spooling batch systems were the first and are simplest of multiprogramming systems

Advantage of Spooling

1.  Spooling operation uses a disk like a very large buffer.

2. Spooling is however capable of overlapping I/O operation for one job with processor operations for another job.

Posted Date: 8/3/2013 2:04:43 AM | Location : United States

Ask an Expert

Related Discussions:- Explain about spooling, Assignment Help, Ask Question on Explain about spooling, Get Answer, Expert's Help, Explain about spooling Discussions

Write discussion on Explain about spooling
Your posts are moderated

Write your message here..

Related Questions

Define memory management, Define memory management In multiprogramming ... Define memory management In multiprogramming system the user part of memory should be further subdivided to accommodate multiple processes. The task of subdivision is carried o

Galvin, difference between process and thread difference between process and thread

Explain deadlock, Explain Deadlock Every process in a set of processes ... Explain Deadlock Every process in a set of processes is waiting for an event which only a process in the set can cause.

Define unixware, Define UnixWare UnixWare manages resources at the proc... Define UnixWare UnixWare manages resources at the process level. Each resource allocated to the application is actually allocated to the process representing the application. C

unix script command and echo command, Objectives 1.    Login to UNIX ... Objectives 1.    Login to UNIX system and logout 2.    Learn features of the vi editor and to use online help (main pages).  Gain experience using them to create a document

Explain peterson''s solution for the critical section problem, Explain the ... Explain the Peterson's solution for the critical section problem? In Peterson's solution two variables a) flag and b) turn are used as shared variables. If the both shared vari

Dual mode operation, WHAT ARE THE ADVANTAGES AND DISADVANTAGES OF DUAL MODE... WHAT ARE THE ADVANTAGES AND DISADVANTAGES OF DUAL MODE OPERATION OF OPERATING SYSTEM>?

Designing issues in a network -fault tolerance, Fault tolerance Machine... Fault tolerance Machine failures, Communication faults, storage device crashes, and decays of storage media should be tolerated by the system to some extent. A fault tolerant s

Write a note on multithreading, Write a note on multithreading. Multith... Write a note on multithreading. Multithreading is the capability of an operating system to execute different parts of a program called as threads, at the same time. The program

Array-initialization loops using lru replacement algorithm, Q. Consider th... Q. Consider the two-dimensional array A: int A[][] = new int[100][100]; Whereas A [0][0] is at location 200 in a paged memory system with pages of size 200. A little process