Explain relative file organization, Operating System

Assignment Help:

Relative file organization

A relative file is an array of fixed-length slots and the records can be inserted in the first free slot found from the beginning of the file and at the end of the file or in a specified slot in the file. Relative files are habitually used when record number will access records directly. Since each of the slots in a relative file is the same size, SFS is able to calculate the position of a specific record (identified by record number) by multiplying the record number by the record slot size.

The records in a relative file is able to be composed of fixed or variable-length fields except the size of each slot in the file is that of the maximum record size (which is calculated from the record specification when a relative file is created). The records in a relative file are able to be updated or deleted in place. Any slots free when records are deleted are able to be reused by subsequent insertions.

The primary index or else a relative file are based on the relative slot number (RSN), which correspond to the number of the slot occupied by a record the first relative slot number in a file is slot number 0 and the highest slot number can't exceed the maximum number of records specified when the file was created and the RSN is a physical part of the user's data record in Contrast this with the ESN used in entry-sequenced files. While a relative file is created at least one field must be of type sfs_unsignedInt32. This field ought to be specified as the primary index

 


Related Discussions:- Explain relative file organization

Explain about memory-management scheme, Q. In the IBM/370 memory protectio...

Q. In the IBM/370 memory protection is offered through the use of keys. A key is a 4-bit quantity every 2K block of memory has a key (the storage key) associated with it. The CPU

Assignment on Fork System Call, Parent process P creates three child proces...

Parent process P creates three child processes, C1, C2, and C3. Each child process executes a memory and CPU intensive application of your choice. Your choice should be such that

Linux kernel components, Example 1.  The diagram illustrating the data stru...

Example 1.  The diagram illustrating the data structures of in-memory VFS objects and on-disk objects and their relationships on slide 24 of the lecture notes OSD.4. This diagram i

Define seek time and latency time, Define seek time and latency time. T...

Define seek time and latency time. The time taken by the head to move to the appropriate cylinder or track is known as seek time. Once the head is at right track, it must wait

Illustrate example for segmentation, EXAMPLE FOR SEGMENTATION Consider ...

EXAMPLE FOR SEGMENTATION Consider an instance as given in the table and we have five segments numbered from 0 through 4 the segment is stock in the physical memory as shown. Th

Fundamental of operating system, An operating system provides the environme...

An operating system provides the environment within that programs are executed. Internally operating systems differ greatly in their makeup because they are organized along many di

Windows admin need it, Windows admin need it Project Description: We ...

Windows admin need it Project Description: We want to protect an executable on operating system level , so the process could be visible among all users while the executable r

Explain basic file system file system architecture, Basic File System ...

Basic File System Uses the specific device driver. Deals with blocks of data that are exchanged with the physical device. Concerned with the placement of blocks on

Custom memory allocation, Some people write custom memory allocators to mee...

Some people write custom memory allocators to meet their speci?c needs. Although this is not needed for most of the applications, it is also not uncommon. The goal, of course, is t

Operating system strectures, with the aid of diagrams describe the followin...

with the aid of diagrams describe the following os structures monolithic , layered, client server

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