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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

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console

The following screen is mirror disk management screen is usedconsole.

[Figure]  Mirror disk management screenconsole

 

Mirror

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disk Status

 Mirror console show mirroring status as follows.

 

Figure

Description

Volume

 

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

The volume condition role is Target.

Status

 

The volume condition status is Mirroring.

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

 

 

Mirror management command descriptions

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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

[Figure] Mirror Management Screendisk properties


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 IP address Copy the volume to the set IP address .

※ 미러 네트워크 주소는 속성 설정 화면에서 변경할 수 있습니다.
    단, 복제가 일시 중지된 상태에서만 변경할 수 있습니다.
    복제 일시 중지는 미러 관리 명령을 통해 할 수 있습니다.
    네트워크 주소 변경 완료 후, 복재 재개를 위해서 미러 재 동기 작업이 필요합니다. 

Screen configuration

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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 screen console is as follows.


[Figure] Shared Disk DR Management Screen

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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 Shared disk DR resource configured in MCCS is expressed as a single mirror set.

 

Figure

Descriptions

Volume

 

Volume in the SOURCE conditionrole.
The capacity in use is displayed on the right side of the volume.

The volume in the TARGET conditionrole of offsite DR.

Status

 

 The volume in the MIRRORING conditionstatus.

Volume in the RESYNCING conditionstatus.
The progress bar is displayed during RESYNCING . 
The volume in pause conditionstatus.
Dirtybit occurred in the volume
split-brain is occurred.
DR volume condition status in NONE

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Mirror disk DR management

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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.

If you use the forceful sync command,
the

 

Menu

Descriptions

Source

Pausing Copy

If you command the pausing copy,
the volume condition will be changed to pause and copying will be paused.

Forceful Sync

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.


Shared disk DR Properties

Image Added
[Figure] Shared Disk DR Properties


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.

Image Added

[Figure]  Mirror disk DR console.

 

Mirror disk set

Mirror disk resource in a cluster is expressed as an MirrorSet.

 

Figure

Description

Volume

Image Added 

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

Image AddedThe volume role of offiste DR is Target.

Status

 

 

Image Added

The volume status is Mirroring.

Image Added

The volume status is Resyncing.
Displays the progress for resyncing.
Image AddedThe volume status is Pause.
Image AddedThere is a dirtybit in the volume.
 Image AddedSplit 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.

Target 

 

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 done forcefullyinitiated between node.
Resuming CopyResumeResume to copy MIRRORING the mirror volume that disk which was paused.
Resynchronization takes will take place in advance, if there is data is changed change during temporary pausepaused. 

Target

 

Lock

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

Unlock

Unlock the target volume to see the content of the fileaccess read only purpose. Mirror status should be paused in advance.
Warning

Unlock When you unlock the target volume to see the content of the file, 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 filedisk. If you want to "write" to the filedisk, you must manually change the readOnly attributes in the registry.  

Descriptions for shared disk DR property configuration

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But it does not highly recommended to secure data integrity.

Mirror disk DR properties

Image Added

[Figure] Shared Disk DR Management Screen  Mirror disk DR properties


Attribute nameName

DescriptionsDescription

JOB ID

JOB ID is displayed.

MirrorEndPointsShows the information of all jobs defined in the mirror. (Node name, Letter, MirrorIP, Sync typeMirror mode)

Compression levelLevel

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. 

Empty 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 network address It copies the volume to the set IP address.

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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.