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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.

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.

Screen configuration

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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 screen console is as follows.

[Figure] Shared Disk DR Management Screen

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It represents the status of node accessing the shared disk.

[그림figure] 공유디스크 DR 노드 접근 상태 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 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.
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	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.
	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.

Target

	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 done forcefullyinitiated between node.
	Resuming CopyResume	Resume 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.
Target		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.
MirrorEndPoints	Shows 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 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 30	New Version Current
Changes made by	헌규임	환기장
Saved on	2015/01/16	2015/10/22

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