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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.

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[Figure]  Mirror disk management screenconsole

 

Mirror

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disk Status

 Mirror console show mirroring status as follows.

 

Figure

Description

Volume

Image Modified 

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

Image ModifiedThe volume condition role is Target.

Status

 

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The volume condition status is Mirroring.

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The volume condition status is Resyncing.
Displays the progress bar for resyncing.
Image ModifiedThe volume condition status is PausePaused.
Image ModifiedThere is a dirtybit in the volume.
 Image ModifiedSplit brain is occurred.

Mirror management command descriptions

Right click with your mouse button on the mirror set volume to see the descriptions of the mirror management commands that can be selected.

Menu

Decription

Connect

Set up communication between two hosts that share the copied data sets.

DisconnectDisconnect communication between two hosts that share the copied data sets.
Forceful sync

If you use the forceful sync command, the status will be changed to RESYNCING and the full synchronization will be done forcefully.

Descriptions of properties setting

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[Figure] Mirror Management Screen


Attribute name

Description

Virtual device pathShows the mounting point.

Meta device path

Shows whether a meta device is internal or external.
Meta device path cannot be changed if it is online.

Resynchronization ratio

Set the resynchronization ratio. (Setting range: 0 - 640MB)
Mirror network address Copy the volume to the set IP address.

 ※ 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.


Policy for recovering auto split brain

Node Priority

policy

Description
Secondary-SecondaryToss the last primary nodeStart synchronization at the node that was primary before a split brain occurred.
Toss the first primary nodeStart synchronization at the node that was second primary before a split brain occurred.
Toss the one with small changesStart synchronization at the node with greater changes when a split brain occurred.
Toss the one with no changesIf only one node has changes, start synchronization on it.
If the both nodes have no changes, synchronize either one.
If the both node have changes, disconnect communication. 
DisconnectCut off a connection without auto recovery.

Primary-Secondary



Consensus

Apply the same recovery policy that is applicable when all the nodes are secondary.
If auto recovery fails, disconnect communication. 
Toss secondary nodeMake the secondary as a sacrifice node.
DisconnectCut off a connection without auto recovery.

Primary-Primary

DisconnectCut off a connection without auto recovery.