Figure 8-2. Structure Of An Entry-Sequenced File - HP Guardian User Manual

Using FUP for Advanced File Management

Figure 8-2. Structure of an Entry-Sequenced File

Entry-Sequenced File:
Primary access is
in the sequence
in which records
are stored in
the file.
Example:
READ (READS FIRST)
READ (READS SECOND)
READ (READS THIRD)
.
.
.
Creating a Relative File
Relative files have these characteristics:
All physical records are the same length.
Records are stored by record number. Record numbers give the position of a record
relative to the first record in the file.
Records are retrieved randomly using record numbers.
Record
1st
2nd
3rd
4th
5th
6th
7th
8th
Latest
Records are stored in the order in which they are
presented to the system (that is, in chronological order).
Guardian User's Guide —425266-001
8 -8
File-Creation Examples
Entry-
Sequenced
File
CDT 002 .CDD