Limitations of file based system, Database Management System

Assignment Help:

Limitations of File Based System

The file-based system has some limitations. The limitations are listed as follows:

  • Isolation and separation of data: When the data is stored in separate files it becomes complex to access. It becomes very complex when the data has to be retrieved from more than two files as a large amount of data has to be looked for.
  • Duplication of data: Because of the decentralised approach, the file system varies to uncontrolled duplication of data. This is disagreeable as the duplication leads to wastage of a lot of storage space. It also money and cost times to enter the data more than once. For instance, the address information of student may have to be duplicated in bus list file data.
  • Inconsistent Data: The data in a file system can become inconsistent if more than one person changes the data simultaneously, for example, if any student changes the residence and the change is notified to only his/her file and not to bus list. Putting wrong data is also another reason for inconsistencies.
  • Data dependence: The physical structure and storage of data files and records are distinct in the application code. This means that it is very difficult to make changes to the existing structure. The programmer would have to recognize all the affected programs, change them and retest them. This characteristic of the File Based system is known as program data dependence.
  • Incompatible File Formats: As the structure of the files is embedded in application programs, the structure is fully dependent on application programming languages. Therefore the structure of a file generated by COBOL programming language may be quite dissimilar from a file generated by 'C' programming language. This incompatibility makes them hard to process together. The application developer may have to develop software to change the files to some common format for processing. Though, this may be time consuming and expensive.
  • Fixed Queries: File based systems are very much dependent on application programs. Any report or query needed by the organisation has to be developed by the application programmer. With type, the time, and number of queries or reports increases. Producing dissimilar types of queries or reports is not possible in File Based Systems. As a result, in some organisations the kind of queries or reports to be produced is fixed. No latest query or report of the data could be produced.

Besides the above, the maintenance of the File Based System is complex and there is no provision for security. Recovery is non-existent or inadequate.


Related Discussions:- Limitations of file based system

HYRISE, how to implement hyrise in C plus plus

how to implement hyrise in C plus plus

MIS, We face problem of stock Opening balance and closing balance in Minus...

We face problem of stock Opening balance and closing balance in Minus

NORRMALIZATION, Home based assignment Consider an ORDER table with the foll...

Home based assignment Consider an ORDER table with the following attributes: • Order Number (ONo),Customer Number (CNo),Customer Name (CNa),Item Number (INo),Unit Price (UP), Quant

Explain the 10 reasons to use mysql, Question 1 Explain the 10 reasons to ...

Question 1 Explain the 10 reasons to use MySQL Question 2 Write the SQL statements to demonstrate the following using SELECT command Expression Evaluation ORDER BY

Assignment, Birla Institute of Technology & Science, Pilani Work-Integrated...

Birla Institute of Technology & Science, Pilani Work-Integrated Learning Programmes Division Second Semester 2012-2013 EC-1 Assignment 2 (7.5% of the grade) Course No. : SS ZG

Explain briefly concurrent task by taking an example, Explain briefly concu...

Explain briefly concurrent task by taking an example. Concurrent Task- The concurrent occurrence of more than one event is called concurrent task. Operating systems can handl

ER-diagram, The State of NewYork certifies firefighters throughout state an...

The State of NewYork certifies firefighters throughout state and keep track all of them, as well as of the state’s fire departments. Each fire department has unique department numb

Explain the term - control as concurrent tasks, Explain the term - Control ...

Explain the term - Control as Concurrent Tasks As we know, any object can be implemented as a task in programming language or operating system. This is the most general approa

Create a e-r diagram, Information about films holds information about movie...

Information about films holds information about movies, stars and studios. Movies have a title, year of production, length and the film type. Stars have a name and address. Studi

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