Sequential File Organization

1. A sequential file is designed for efficient processing of records in sorted order on some search key.

    

    

The International Standards Organization (ISO) Open Systems Interconnect (OSI) is a standard set of rules describing the transfer of data between each layer. Each layer has a specific function. For example the Physical layer deals with the electrical and cable specifications.

Techniques of File Organization

The three techniques of file organization are:

1. Heap (unordered)
2. Sorted
   1. Sequential (SAM)
   2. Line Sequential (LSAM)
   3. Indexed Sequential (ISAM)
3. Hashed or Direct

In addition to the three techniques, there are four methods of organizing files. They are sequential, line-sequential, indexed-sequential, inverted list and direct or hashed access organization.

File organization determines the set of access methods for Storing and retrieving records from a file so file organization means access methods for accessing and retriving files from storage.

In file organization we must consider a better way for storaging our file to improve query performance for getting data fromstorage medium.

This is the most common structure for large files that are typically processed in their entirety, and it's at the heart of the more complex schemes.