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Attribute name

Description

JOB ID

JOB ID is displayed.

Bit MapIt 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.
‘0’ means no compression. The greater value transfer more data in a smaller bandwidth, but it uses more CPU resource of the node.
Thus, by properly balancing the system CPU usage and the network bandwidth, select the proper compression level that can maximize the efficiency.

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.
‘0’ means that the given bandwidth will be used with maximum efficiency.

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

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Attribute name

Descriptions

JOB ID

JOB ID is displayed.

MirrorEndPointsShows 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. 
‘0’ means no compression. The greater value transfer more data in a smaller bandwidth, but it uses more CPU resource of the node. 
Thus, by properly balancing the system CPU usage and the network bandwidth, select the proper compression level that can maximize the efficiency.

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. 
‘0’ means that the given bandwidth will be used with maximum efficiency.

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.
Displays the capacity in use on the right side of the volume. 

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.

...

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. 

ResyncThe mirror status will be changed to RESYNCING and the full synchronization will be initiated between node.
ResumeResume 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.
Warning

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.

MirrorEndPointsShows 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. 
‘0’ means no compression. The greater the value is, the smaller bandwidth is used to transmit greater data. But also, it uses more of the CPU resources. 
Thus, by properly balancing the system CPU usage and the network bandwidth, select the proper compression level that can maximize the efficiency. 

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. 
‘0’ means that the given bandwidth will be used with maximum efficiency.

Mirror IP AddressIP 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.