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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.

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Mirror Disk Console

Mirror disk management console

The following capture screen is mirror disk management console.

[Figure]  Mirror disk management console

 

Mirror

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disk Status

 The mirror resource configured in MCCS is expressed as a single mirror set.

 

Figure

Description

Volume

 

The volume role is Source.
Displays the capacity in use on the right side of the volume. 

The volume role is Target.

Status

 

The volume status is Mirroring.

The volume status is Resyncing.
Displays the progress for resyncing.
The volume status is PausePaused.
There is a dirtybit in the volume.
 Split brain is occurred.

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Menu

Description

Source

Pause copyingIf you use the pause copying command, the volume condition

The mirror status will be changed to PAUSE and copying replication will be paused. 

Forceful syncIf you use the forceful sync command, the ResyncThe mirror status will be changed to RESYNCING and the full synchronization will be done forcefullyinitiated between node.
Resume copyingContinue to copy Resume MIRRORING the mirror volume that disk which was paused. Resynchronization will take place in advance, if there is data change during temporary pausepaused. 

Target

Lock

Lock the The volume is locked to prevent access anymorethe volume from the node.

Unlock

When you unlock Unlock the target volume , you can see the content of the file. to access read only purpose. Mirror status should be paused in advance.
Warning

When you unlock the target volume, you can see the content of the fileaccess the volume read only purpose. It can cause a negative effect to the mirror.
Even if you unlock it, you cannot write to the filedisk. If you want to "write" to the filedisk, you must manually change the readOnly attributes in the registry. But it does not highly recommended to secure data integrity.

Descriptions of properties setting

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Attribute name

Description

JOB ID

JOB ID is displayed.

Bit MapIt is the directory containing the of intent log.

Compression level

It represents the compression level for a specific copy mirror set. The setting level 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, value transfer more data in a smaller bandwidth, but it uses more CPU resource of the CPU resourcesnode.
Thus, by properly balancing the system CPU usage and the network bandwidth, select the proper compression level that can maximize the efficiency.

Empty 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 network address IP address of data replication between nodes in a cluster.

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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.

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