16.4.1 Starting the HADB servers in the multi-node configuration
- Organization of this subsection
(1) Startup procedure for the HADB servers in a multi-node configuration
The procedure for starting the HADB servers in the multi-node configuration is given below.
- Important
-
After you have confirmed that monitoring by HA Monitor has stopped, start the HADB servers in the multi-node configuration. If you accidentally executed HA Monitor's monbegin command before executing the adbstart command, execute the monend command to stop monitoring by HA Monitor and the HADB servers that are running. Then, follow the correct procedure to start the HADB servers in the multi-node configuration.
Procedure:
-
Confirm that HA Monitor is active on all nodes.
For the confirmation method, see System Operation in the manual HA Monitor for Linux(R) (x86).
-
Execute the adbstart command on all nodes.
When the adbstart command is executed, the message KFAA91109-I is output asking for execution of HA Monitor's monbegin command.
-
Execute HA Monitor's monbegin command on all nodes.
After confirming that the message KFAA91109-I is output, execute the monbegin command from a different terminal (command input screen).
- Important
-
Execute the monbegin command before the adbstart command terminates.
If the adbstart command terminates normally on all nodes, the starting process for the HADB servers in the multi-node configuration is complete.
(2) Startup modes of HADB servers in the multi-node configuration
The following table shows the startup modes of HADB servers in the multi-node configuration.
|
No. |
Startup mode |
Command to be executed |
Explanation |
Last termination mode |
|---|---|---|---|---|
|
1 |
Normal start |
adbstart |
This is the normal startup mode. In a normal start, database recovery processing does not take place. |
When the master node HADB server terminated normally |
|
2 |
Restart |
If the previous termination mode is as described on the right, the server will automatically restart. During the restart, system logs of the HADB server on the master node are used to perform database recovery processing. |
When only the master node remains, and that master node's HADB server terminated abnormally or was forced to terminate |
(3) HADB server operation modes in the multi-node configuration
In the case of an HADB server on the master node, by specifying an option for the adbstart command, you can specify the HADB server operation mode to be used after the HADB server has started. In the case of an HADB server on a slave node, its HADB server operation mode is always the quiescence mode, and therefore you cannot change the HADB server operation mode by specifying an option for the adbstart command.
(4) Checking whether the startup process for HADB servers in the multi-node configuration is complete
Confirm that the return code of the adbstart command is 0 or 4 on all nodes.
(5) Notes on starting HADB servers in the multi-node configuration
Startup processing of the HADB servers in the multi-node configuration is not complete until startup processing of each HADB server on each node is complete. If startup processing of the HADB servers in the multi-node configuration is not complete, check whether an error or failure occurred on one of the nodes.