Appendix H. Mirror Management Console
- 헌규임
- 환기장
- 이진현
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. Displays the progress for 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 data replication 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.
SDR console
Shared disk DR management console
Shared disk DR management console is as follows.
[Figure] Shared Disk DR Management Screen
Node access status
It represents the status of node accessing the shared disk.
[figure] Shared disk DR node access status
Figure | Description |
| Both nodes accessing the volume |
| Active1 node accessing the volume |
 | StandBy1 node accessing the volume |
 | Neither of nodes accessing the volume |
Mirror set configuration
The Shared disk DR resource configured in MCCS is expressed as a single mirror set.
| Figure | Descriptions |
Volume | | Volume in the SOURCE role. |
 | The volume in the TARGET role of offsite DR. | |
Status
|
| The volume in the MIRRORING status. |
| Volume in the RESYNCING status. The progress bar is displayed during RESYNCING . | |
| The volume in pause status. | |
| Dirtybit occurred in the volume | |
| split-brain is occurred. | |
 | DR volume status in NONE |
Mirror disk DR management menu
Right click with your mouse button on the mirror set volume in mirror volume to see the descriptions of the mirror management commands that can be selected.
| Menu | Descriptions |
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.
Shared disk DR Properties
[Figure] Shared Disk DR Properties
Attribute name | Descriptions |
JOB ID | JOB ID is displayed. |
| MirrorEndPoints | Shows the information of all jobs defined in the mirror. (Node name, Letter, MirrorIP, Mirror mode) |
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 data replication between a cluster and an offisite DR. |
MDR console
Mirror disk DR management console
Mirror disk DR management console is as follows.
[Figure] Mirror disk DR console.
Mirror disk set
Mirror disk resource in a cluster is expressed as an MirrorSet.
| Figure | Description |
Volume |
| The volume role is Source. |
| The volume role of offiste DR is Target. | |
Status
|
| The volume status is Mirroring. |
| The volume status is Resyncing. Displays the progress for resyncing. | |
| The volume status is Pause. | |
| There is a dirtybit in the volume. | |
| | Split brain is occurred. |
Mirror disk DR management menu
Right click with your mouse button on the mirror set volume in mirror 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.
Mirror disk DR properties
[Figure] Mirror disk DR properties
Attribute Name | Description |
JOB ID | JOB ID is displayed. |
| MirrorEndPoints | Shows the information of all jobs defined in the mirror. (Node name, Letter, MirrorIP, Mirror mode) |
Compression Level | It represents the compression level for a specific copy set. The setting range is from 0 to 9. |
Flush Async Queue | It prevents deletion of queues on a specific volume even if a driver receives a request for deleting a queue. |
| Bandwidth | It represents the max network bandwidth (kbps/sec) that can be used by a copy set. |
| Mirror IP Address | IP address of data replication between a cluster and an offisite DR. |
※ 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.