20.5.1 Attributes of DB areas that are created
The following table describes the attributes of the DB areas that are created by executing the adbinit command.
|
No. |
Type of DB area |
DB area name |
DB area file name |
DB area ID |
Page size (kilobytes) |
Segment size (pages) |
|---|---|---|---|---|---|---|
|
1 |
Master directory DB area |
ADBMST |
ADBMST |
1 |
4 |
256 |
|
2 |
Dictionary DB area |
ADBDIC |
ADBDIC |
2 |
4 |
8 |
|
3 |
Work table DB area |
ADBWRK |
ADBWRK |
3 |
Specified in the adb_init_wrk_page_size operand |
1 |
|
4 |
System-table DB area |
ADBSTBL |
ADBSTBL |
4 |
4 |
16 |
|
5 |
Data DB area |
Specified in the -n option#1 |
Specified in the -n option#1, #2 |
11 to 1,024 |
Specified in the -p option#1 |
4,096 kilobytes ÷ page size#3 |
- Notes
-
-
A maximum of 1,014 data DB areas can be created.
-
One each of the DB areas other than the data DB areas is created automatically.
-
- #1
-
Option of the adbinitdbarea operand
- #2
-
Files with the same name as the DB area name are created. If a subdirectory is specified in the -f option of the adbinitdbarea operand, the DB area files are created directly under that subdirectory.
- #3
-
The segment size is determined automatically based on the page size.
Page size (kilobytes)
Segment size (pages)
4
1,024
8
512
16
256
32
128