About Traditional File system
In this article you will clearly understand the knowledge of traditional file system. Here we thoroughly describe traditional file system before going in deep we discuss about Records system and File System in this article
What is Record?
A collection of related fields treated as a single unit is called a record. Let us assume a employee’s biographic information in a bank
What is File?
A collection of related records as a single unit is called a file or a set of data. If we collect records of all employees, it becomes a file (or bio information) of all the employess of bank
Types of File:
File are categorized according to different criteria as discussed below
Usage point of view files:
First we discussed about master files, These are the latest update file which never become empty, ever since they are created. They maintain information that remains constant over a long period of time. Whenever the information changes in files or records, it is updated. Methods of updating are adding, deleting or editing records in a file. The next file is Transaction file, These are those files in which data prior to the stage of processing is recorded. It may be temporary file, retained till the master file is updated. It may also be used to maintain a permanent record of transaction data. Backup Files, These are again permanent files and their purpose is the protection of vital files or data of an organization by creating them using some specific software utilities
Functional Point of View Files:
For this purpose, the files are given appropriate names, consisting of two parts I.e. file name and file extension, having dot “.” in between. Normally the extension is given by the software being used at the time of initial save. These file are summarized as under Program files, these contain the software instruction i.e. source program files and executable files. This source program files may have the extension as .com and the executable files as .exe. Data files, These are the files that contain data and are created by the software being used.
Storage Point of View Files:
First we Discuss Sequential Files, As the name refer these files are stored or created on the storage media in the order the record are entered i.e. one after another in the sequence. They require comparatively more processing time. Direct or Random Files, These files reside on the storage media according to the address which is calculated against the value of the key field of the record. Sometimes the same address is calculated, which leads to the concept of synonyms. In last Indexed Sequential Files, The key field of the records (in a file) is stored separately along with the address of each record. These files can be processed sequentially as well as randomly. They require relatively more space on the storage media but the processing is as fast as random or direct files.