Hitachi

Hitachi Advanced Database Setup and Operation Guide


D.1 Maximum and minimum values related to system configuration

The following table shows the maximum and minimum values relevant to the HADB system configuration.

Table D‒1: Maximum and minimum values related to HADB system configuration

No.

Item

Minimum value

Maximum value

Unit

1

Total number of HADB users

1

30,000

Users

2

Total number of DB areas

5

1,024

Areas

3

Number of master directory DB areas

1

Areas

4

Number of dictionary DB areas

1

Areas

5

Number of system-table DB areas

1

Areas

6

Number of work table DB areas

1

4#1

Areas

7

Number of data DB areas

1

1,014

Areas

8

DB area name

1

30

Bytes

9

DB area file relative path name

1

100

Bytes

10

Size of dictionary DB area

--

16

Terabytes

11

Size of system-table DB area

--

16

Terabytes

12

Size of work table DB area

--

Work table DB area page size x 4,294,967,295

Bytes

13

Size of data DB area

--

128

Exabytes

14

Size of files in data DB area

--

128

Petabytes

15

Number of configuration files per DB area in data DB area

1

1,024

Files

16

Size of one work table

--

Work table DB area page size x 4,294,967,295

Bytes

17

Number of base tables that an HADB user can define

0

4,096

Tables

18

Number of viewed tables that an HADB user can define

0

30,000

Tables

19

Number of indexes that an HADB user can define

0

8,192

Indexes

20

Number of base tables in a DB area

0

200

Tables

21

Number of indexes per DB area

0

400

Indexes

22

Maximum number of statement handles

4,095

Handles

23

Maximum number of concurrent connections#2

1,024

Connections

24

Page size (excluding work table DB areas)

4,096

32,768

Bytes

25

Work table DB area page size

32,768

33,554,432

Bytes

26

Number of master log files

1

Files

27

Number of user log files

1

10,240

Files

28

Number of chunks in a DB area

1

30,000

Chunks

29

Number of chunks that can be created in a base table

1

30,000

Chunks

30

Number of nodes when the multi-node function is used

2

4

Nodes

31

Number of synonym dictionaries an HADB user can register

0

50

Synonym dictionaries

Legend:

--: Not applicable.

#1

This is the maximum value applied when using the multi-node function. Because one work table DB area can be created in each node, up to 4 work table DB areas can be created.

#2

When the multi-node function is used, this is the maximum number of concurrent connections for all HADB servers in the multi-node configuration.