Appendix G. Mirror Management Console
The mirror management console is provided only for the individual mirror resources managed by MCCS.
The mirror management console operates independently from the engine logic of MCCS, so during operation, it can collide with MCCS.
The mirror management console informs users of the mirror volume status and the capacity of the mirror in use. You can change the bandwidth and the mirror network addresses in it.
Table of Contents
Mirror Disk Console
Mirror disk management console
The following screen is mirror disk management console.
[Figure] Mirror disk management console
Mirror disk Status
Mirror console show mirroring status as follows.
| Figure | Description |
Volume | | The volume role is Source. |
| The volume role is Target. | |
Status
| | The status is Mirroring. |
| The status is Resyncing. | |
| The status is Paused. | |
| There is a dirtybit in the volume. | |
| Split brain is occurred. |
Mirror management command descriptions
Right click with your mouse button on the mirror set volume to see the descriptions of the mirror management commands that can be selected.
| Menu | Description |
Source | Pause | The mirror status will be changed to PAUSE and replication will be paused. |
Resync | The mirror status will be changed to RESYNCING and the full synchronization will be initiated between node. | |
Resume | Resume MIRRORING the mirror disk which was paused. Resynchronization will take place in advance, if there is data change during paused. | |
Target | Lock | The volume is locked to prevent access the volume from the node. |
Unlock | Unlock the target volume to access read only purpose. Mirror status should be paused in advance. |
When you unlock the target volume, you can access the volume read only purpose. It can cause a negative effect to the mirror.
Even if you unlock it, you cannot write to the disk. If you want to "write" to the disk, you must manually change the readOnly attributes in the registry. But it does not highly recommended to secure data integrity.
Descriptions of properties setting
[Figure] Mirror disk properties
Attribute name | Description |
JOB ID | JOB ID is displayed. |
Bit Map | It is the directory of intent log. |
Compression level | It represents the compression level for a specific mirror set. The level range is from 0 to 9. |
Flush async queue | Even if a driver receives a request for deleting a queue, this function can be used to prevent deletion of queues on a specific volume. |
Bandwidth | It is the max network bandwidth (kbps/sec) that can be used by a copy set. |
Mirror IP address | IP address of mirror disk between nodes in a cluster. |
※ Mirror IP address is able to be edited. But this can be done when mirror state is paused. If mirror status is MIRRORING when you edit the mirror IP address, the status changed to PAUSE automatically. Select the resume from mirror menu to resume the mirroring after done this.