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

What happens when you execute a program in unix, When you run a program on ... When you run a program on your UNIX system, the system prepares a special environment for that program. This environment owns everything needed for the system to execute the progra

Linux os, Introduction of linux Introduction of linux

Explain demand paging in virtual memory system, Question 1 Explain with di... Question 1 Explain with diagram all possible states a process visits during the course of its execution Question 2 Discuss Inter-process Communication. What is critical-secti

Benefits and drawbacks of batch system, Q. Benefits and Drawbacks of Batch ... Q. Benefits and Drawbacks of Batch System? Benefits of Batch System: Move much of the work of operator to computer. Increased performance as it was possible for j

Batch system, what is a batch system give me answer in simple words so that... what is a batch system give me answer in simple words so that i can understand

Activities of operating system-secondary-storage management, Q. What are th... Q. What are the three main activities of an operating system in regard to secondary-storage management? Answer: 1) Free-space management 2) Storage allocation 3) Disk

Briefly discuss on bankers algorithm, Briefly discuss on Bankers algorithm?... Briefly discuss on Bankers algorithm? The resource-allocation graph algorithm is not applicable to a resource-allocation system with multiple examples  for each resource type.

Application software, what is application software? what is application software?

Define the non monolithic coding, Define the Non Monolithic Coding Fir... Define the Non Monolithic Coding First off, client - server developers must adopt a new programming mindset. Much as with the shift to object - oriented design, developers sho

Opreation reasrech, origin of opreation reasrech origin of opreation reasrech