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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.
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.

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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 sync	If you use the forceful sync command, the Resync	The mirror status will be changed to RESYNCING and the full synchronization will be done forcefullyinitiated between node.
	Resume copying	Continue 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 Map	It 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	Copy the volume to the set IP address.

화면 구성

공유디스크 DR 관리 화면

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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.

Image Modified
[그림Figure] 공유디스크 DR 관리 화면Shared Disk DR Management Screen

노드 접근 상태

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Node access status

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Image Removed

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It represents the status of node accessing the shared disk.
Image Modified

[그림figure] 공유디스크 DR 노드 접근 상태

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그림

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설명

Shared disk DR node access status

Figure	Description
Image Added	Both nodes accessing the volume
Image Modified	Active1 노드에서 볼륨을 접근한 상태node accessing the volume
Image Modified	StandBy1 노드에서 볼륨을 접근한 상태node accessing the volume
Image Modified	양쪽 노드 모두 볼륨에 접근하지 않은 상태

미러 셋 구성

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Neither of nodes accessing the volume

Mirror set configuration

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

상태

	그림Figure	설명Descriptions
볼륨Volume	Image Modified	볼륨 상태가 SOURCE 상태 볼륨의 오른쪽에는 사용중인 용량이 표시됩니다.
볼륨Volume	Image Removed	볼륨 상태가 TARGET상태
Volume in the SOURCE role. The capacity in use is displayed on the right side of the volume.
Image Added	The volume in the TARGET role of offsite DR.
Status	Image Modified볼륨의 상태가 MIRRORING 상태	The volume in the MIRRORING status.
	Image Modified	볼륨의 상태가 RESYNCING 상태 RESYNCING 진행 시 상태 바가 표시됩니다.
	Image Removed	볼륨 상태가 PAUSE 상태
	Image Removed	볼륨에 dirtybit 발생Volume in the RESYNCING status. The progress bar is displayed during RESYNCING .
	Image Added	The volume in pause status.
	Image Added	Dirtybit occurred in the volume
	Image Modified	split-brain 발생 상태is occurred.
	Image Modified	DR 볼륨 상태가 NONE인 상태

공유디스크 DR 관리 명령 설명

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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.

	메뉴Menu	설명Descriptions
소스Source	복제 일시 중지	복제 일시 중지 명령시 볼륨 상태가 PAUSE 상태로 변경 되며 복제가 일시 중지 됩니다.
	강제 동기	강제 동기 명령시 RESYNCING 상태로 변경 되며 강제로 전체 동기화를 진행합니다.
	복제 재개	일시 중지된 미러 볼륨의 복제 작업을 재개 합니다. 일시 중지 중에 데이터 변동이 일어 났다면 재동기 작업이 발생합니다.
타겟	잠금	볼륨을 잠궈 더이상 접근 할 수 없게 됩니다.
	잠금 해제	대상 볼륨의 잠금을 해제 하여 파일 시스템의 내용을 볼 수 있도록 합니다.

Warning
Target 볼륨 잠금 해제시 파일 시스템의 내용을 볼 수 있도록 합니다. 이로 인해 미러에 부정적인 영향을 줄 수 있습니다. 락(lock)을 해제해도 파일에 쓰기 작업은 수행 할 수 없습니다. "쓰기" 작업을 수행하기 위해서는 레지스트리의 readOnly 속성을 수동으로 수정해야 합니다.

공유디스크 DR 프로퍼티 설정 설명

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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.

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.
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. ‘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.
Volume	Image Added	The 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 Added	The volume status is Pause.
	Image Added	There is a dirtybit in the volume.
	Image Added	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.
Target	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

Image Added

[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. ‘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 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.

Version	Old Version 27	New Version Current
Changes made by	헌규임	환기장
Saved on	2014/11/20	2015/10/22

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