4.3.4 List of shared resource statuses
This subsection explains the events that occur in HA Monitor and on the servers and how HA Monitor controls the shared resource status when each event occurs.
The following table describes the shared resource statuses that are controlled by HA Monitor.
|
Event |
Shared resource |
|||||
|---|---|---|---|---|---|---|
|
Shared disk |
File system |
LAN |
||||
|
Volume group |
||||||
|
Event on the server |
Start of the active server has started. |
Connected for referencing and updating |
Mounted |
Connected |
||
|
Start of the active server has been completed. |
-- |
-- |
-- |
|||
|
Start of the active server failed |
Disconnected |
Unmounted |
Disconnected |
|||
|
Start of the active server failed (when the hot standby operation is performed in a multi-standby configuration). |
Disconnected |
Unmounted |
Disconnected |
|||
|
The active server restart limit was detected.#1 |
Disconnected |
Unmounted |
Disconnected |
|||
|
The active server was terminated normally.#2 |
Disconnected |
Unmounted |
Disconnected |
|||
|
Abnormal termination of active server #3, #4 |
Disconnected |
Unmounted |
Disconnected |
|||
|
Start of the standby server has started. |
Disconnected |
Unmounted |
Disconnected |
|||
|
Start of the standby server was completed. |
-- |
-- |
-- |
|||
|
Start of the standby server failed. |
-- |
-- |
-- |
|||
|
The standby server was terminated normally.#2 |
-- |
-- |
-- |
|||
|
The standby server was terminated abnormally. |
-- |
-- |
-- |
|||
|
Event in HA Monitor |
Detection of an active server failure #4, #5 |
Disconnected |
Unmounted |
Disconnected |
||
|
An active system failure was detected. |
Input/output reset#6 |
Input/output reset#6 |
Input/output reset#7 |
|||
|
A standby system failure was detected. |
-- |
-- |
-- |
|||
|
Hot standby switching to the standby system was completed. |
Connected for referencing and updating |
Mounted |
Connected |
|||
|
Hot standby switching to the standby system failed. |
Disconnected |
Unmounted |
Disconnected |
|||
|
Monitor-mode server startup command (monbegin command)#8 |
Active system |
Connected for referencing and updating |
Mounted |
Connected |
||
|
Standby system |
Disconnected |
Unmounted |
Disconnected |
|||
|
Monitor-mode server termination command (monend command) |
Active system |
Disconnected |
Unmounted |
Disconnected |
||
|
Standby system |
-- |
-- |
-- |
|||
|
Standby server termination command (monsbystp command) |
-- |
-- |
-- |
|||
|
Server hot-standby switchover command (monswap command) |
Active system |
Disconnected |
Unmounted |
Disconnected |
||
|
Standby system |
Connected for referencing and updating |
Mounted |
Connected |
|||
|
Command for adding shared resources (mondevice -a command) |
Active system |
Connected for referencing and updating |
N |
N |
||
|
Standby system |
Disconnected |
N |
N |
|||
|
Command for deleting shared resources (mondevice -d command) |
Active system |
-- |
N |
N |
||
|
Standby system |
-- |
N |
N |
|||
- Legend:
-
--: Remains unchanged.
N: Not subject to command processing.
#1: Already disconnected if the active server is in the start retry state.
#2: Includes planned and forced server termination.
#3: This is when the server itself has detected a failure.
#4: The status remains unchanged when the active server is placed in the restart wait state.
#5: The status remains unchanged if there is no standby server subject to the hot standby operation.
#6: This resource is forcibly reserved if SCSI reservation for shared disk is used.
#7: The status remains unchanged if SCSI reservation for shared disk is used.
#8: After server startup has been completed or has failed, the shared resource statuses are the same as for similar events on the server.