Download AMOS ISAM System

Page V
ISAM SYSTEM USER'S GUIDE•
TabLe of Contents
CHAPTER 1
INTRODUCTION TO ISAM
1.1
THE INDEXED SEQUENTIAL ACCESS METHOD
1—1
1.2
DESCRIPTION OF INDEXED SEQUENTIAL FILES
1—3
1.2.1
1.2.2
1.3
ISAM ACCESS MODES
1.3.1
1.3.2
1.3.3
1.4
The Data FiLe
The Index FiLe
Counted Update Mode
ExcLusive Open Mode
Hints and Restrictions
CONVERTING VERSION 4.2 ISAM FILES TO ISAM
VERSIONS 4.3 OR LATER
PART I
THE ISAM UTILITY PROGRAMS
CHAPTER 2
CREATING AND LOADING AN ISAM FILE WITH ISMBLD
1—4
1—4
1_s
1—5
1—6
1—7
18
2.1
GENERAL OPERATING INSTRUCTIONS
2—1
2.2
CREATION MODE
2—1
2.3
FILE LOADING MODE
2.2.1
2.3.1
2.4
2.5
2—2
Specifying File Parameters
2—2
Size
of
key
2.2.1.1
2—2
2.2.1.2 Position of key
2—2
2.2.1.3 Size of data record
2.2.1.4 Number of records to
2—2
aLlocate
2—2
2.2.1.5 Entries per index block:
2.2.1.6 Empty index blocks to
2—3
aLlocate
2—3
2.2.1.7 Primary Directory"
2.2.1.7.1 Secondary FiLe .... 2—3
2—3
2.2.1.8 Data FiLe Device"
2—3
Suppressing ExcLusive Open Mode
(the IN Switch)
2—4
CHANGING THE DATA FILE DEVICE
(THE ID SWITCH)
OPTIMIZING FILE PARAMETERS
2—4
2.5.1
2.5.2
Entries per Index Block
Empty Index Blocks to AlLocate
2—4
2—5
2—5