Explain about spooling, Operating System

Assignment Help:

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.

8_Explain about Spooling.png

  • 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.


Related Discussions:- Explain about spooling

Why do systems store the operating system in firm ware, Q. Why do several s...

Q. Why do several systems store the operating system in firm ware and others on disk? Answer: For certain devices such like handheld PDAs and cellular telephones a disk with

Linux, Discuss the risks of having a single root user

Discuss the risks of having a single root user

What are the characteristics of srs, What are the characteristics of SRS? ...

What are the characteristics of SRS? i. Correct - The SRS should be made up to date when appropriate requirements are identified. ii. Unambiguous - When the requirements are

What is a thread, What is a thread? A thread or else called a lightweig...

What is a thread? A thread or else called a lightweight process (LWP) is a basic unit of CPU utilization, it comprises of a thread id, a program counter, a register set and a s

Implementation of lru, 1. On every access, mark the page with a timestamp. ...

1. On every access, mark the page with a timestamp. Whenever we need to evict a page, we search through memory for the oldest page, the least-recently used page. But we need memory

What are the objectives of operating system?, What are the objectives of op...

What are the objectives of operating system? Objectives of OS 1.      Convenience: An OS makes a computer more suitable to use. 2.      Efficiency : An OS allows t

Page-table lookups, How exactly is a page table used to look up an address?...

How exactly is a page table used to look up an address? The CPU has a page table base register (PTBR)which points to the base (entry 0) of the level-0 page table. Each process h

Architects applications by making use of multitasking, Architects Applicati...

Architects Applications by Making Use of Multitasking As the capability of computer hardware keeps increasing, operating systems are presented with overwhelming opportunities.

Describe the file system architecture-device driver, Device Drivers ...

Device Drivers Communicates straight with peripheral devices (disks, tapes, etc.). Responsible for begin physical I/O operations on the device. Pro

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd