IBM XIV Storage System Copy Services and Migration

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4.4.16 Deleting mirror coupling definitionsWhen an XIV mirror coupling is deleted, all metadata and mirroring definitions are deleted,and the peers do not have any relationship at all (Figure 4-43). However, any volumes andconsistency groups mirroring snapshots remain on the local and remote XIV systems. Inorder to restart XIV mirroring, a full copy of data is required.Site 1 Site 2Production ServersDR Test/Recovery ServersFigure 4-43 Deleting mirror coupling definitionsTypical usage of mirror deletion is a one-time data migration using remote mirroring. Thisincludes deleting the XIV mirror couplings after the migration is complete.106 IBM XIV Storage System: Copy Services and Migration
4.5 Best practice usage scenariosThe following best practice usage scenarios begin with the normal operation remotemirroring environment shown in Figure 4-44.Site 1 Site 2Production ServersDR Test/Recovery ServersXIV 1TargetXIV 2Volume PeerDesignated PrimaryMaster RoleMVolumeCoupling/MirrorActiveSVolume PeerDesignated SecondarySlave RoleCG PeerDesignated PrimaryMaster RoleMCGCoupling/MirrorActiveSCG PeerDesignated SecondarySlave RoleFigure 4-44 Remote Mirroring environment for scenarios4.5.1 Failure at primary site: switch production to secondaryThis scenario begins with normal operation of XIV remote mirroring from XIV 1 to XIV 2,followed by a failure at XIV 1 with the assumption that the data already existing on the XIVsystem at XIV 1 will be available for resynchronization when XIV 1 is repaired and returned tooperation.1. XIV remote mirroring may have been deactivated by the failure.2. Change the role of the peer at XIV 2 from slave to master. This allows the peer to beaccessed for writes from a host server, and also causes recording of any changes inmetadata for synchronous mirroring. For asynchronous mirroring, changing the role fromslave to master causes the last replicated snapshot to be restored to the volume. Nowboth XIV 1 and XIV 2 peers have the master role.3. Map the master (secondary) peers at XIV 2 to the DR servers.4. Bring the XIV 2 peers (now with the master role) online to the DR servers to beginproduction workload at XIV 2.5. When the failure at XIV 1 has been corrected and XIV 1 is available, deactivate mirrors atXIV 1 if they are not already inactive.6. Unmap XIV 1 peers from servers if necessary.7. Activate remote mirroring from the master peers at XIV 2 to the slave peers at XIV 1. Thisstarts resynchronization of production changes from XIV 2 to XIV 1.8. Monitor the progress to ensure that resynchronization is complete.9. Quiesce production applications at XIV 2 to ensure that application-consistent data iscopied to XIV 1.Chapter 4. Remote Mirroring 107
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Front coverIBM XIV Storage System:C
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Note: Before using this information
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7.9.4 Host server cannot access the
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viiiIBM XIV Storage System: Copy Se
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TrademarksIBM, the IBM logo, and ib
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Recovery Program at the Pentagon fo
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Comments welcomeYour comments are i
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1.1 Snapshots architectureBefore we
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A logical volume is represented by
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If you know in advance that an auto
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An application can utilize many vol
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Note: The creation date of the dupl
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Along with these properties, the tr
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The GUI also lets you specify the d
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pointers to the original data are l
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For the second scenario, the origin
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Figure 1-28 no longer displays the
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To examine the details of the scena
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Restriction: Volumes in a consisten
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When created, the consistency group
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The new snapshots are created and d
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To obtain details about a consisten
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Example 1-12 illustrates the snap_g
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1.5 MySQL database backup exampleMy
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Before running the backup script, a
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# XCLI command to perform the backu
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40 IBM XIV Storage System: Copy Ser
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2.1 OverviewThis section includes a
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Figure 2-2 shows the Tivoli Storage
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►For exchange data, the Microsoft
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2.4.1 XIV VSS Provider installation
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Provide specific information regard
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The Windows server is now ready to
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3. The Requirements Check dialog wi
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Page 74 and 75: To perform a VSS snapshot backup of
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Page 78 and 79: To see a list of the available VSS
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Page 82 and 83: 3.1 Volume copy architectureThe vol
Page 84 and 85: Figure 3-2 provides an example of t
Page 86 and 87: After the copy is complete, power u
Page 88 and 89: 4.1 XIV Remote Mirroring overviewTh
Page 90 and 91: ►Host read operations are perform
Page 92 and 93: Figure 4-4 shows remote mirror conn
Page 94 and 95: 4.2.2 Operational proceduresMirrori
Page 96 and 97: After mirroring has been implemente
Page 98 and 99: 4.3 XIV Remote Mirroring usageRemot
Page 100 and 101: ►Metro region plus out-of-region
Page 102 and 103: Figure 4-15 shows an XIV local snap
Page 104 and 105: ►XIV target configuration: synchr
Page 106 and 107: ►XIV target configuration: bi-dir
Page 108 and 109: Connections must be made between po
Page 110 and 111: In Figure 4-28, five of the seven e
Page 112 and 113: If multiple volumes will have depen
Page 114 and 115: there are certain additional constr
Page 116 and 117: In synchronous mirroring, during st
Page 118 and 119: 4.4.11 Mirror reactivation and resy
Page 120 and 121: ►►The volume mirroring settings
Page 124 and 125: 10.Unmap master peers at XIV 2 from
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Page 128 and 129: 4.7 Advantages of XIV mirroringXIV
Page 130 and 131: As seen in Example 4-1, in the Role
Page 132 and 133: hover the mouse over a port, as sho
Page 134 and 135: Selecting Configure opens a configu
Page 136 and 137: Connections are easily defined by c
Page 138 and 139: 4.11.3 XCLI examplesXCLI commands c
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Page 142 and 143: 5.1 Synchronous mirroring configura
Page 144 and 145: - Slave CG / VolumeThis is the name
Page 146 and 147: 2. On the Secondary XIV go to the R
Page 148 and 149: Adding a mirrored volume to a mirro
Page 150 and 151: 5.3 Role reversalWith synchronous m
Page 152 and 153: uncommitted data, and it is the res
Page 154 and 155: ►►The local site recoveryThe ol
Page 156 and 157: Example 5-8 List mirror couplingsFi
Page 158 and 159: 5.5.3 Phase 3: recovery of the prim
Page 160 and 161: Reactivating the remote mirror coup
Page 162 and 163: 5.5.4 Phase 4: switching production
Page 164 and 165: 5. Reassign volumes back to the pro
Page 166 and 167: 6.1 Asynchronous mirroring configur
Page 168 and 169: The slave volume must be unlocked a
Page 170 and 171: Using XCLI for volume mirroring set
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consistency group requires the volu
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Go to the Mirroring panel and verif
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-- Activate Mirror CGmirror_activat
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Change RPO and intervalThe required
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Deactivation on the masterTo deacti
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6.2 Role reversalChanging roles can
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Slave peer consistencyWhen the user
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►►A disaster that makes the who
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6.5.2 Mirroring ongoing operationFo
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The sync job runs and the mirror st
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Mirror synchronization statusSynchr
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GUI steps to duplicate a snapshot g
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Figure 6-42 New master volumesAfter
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XCLI commands for DR testingFigure
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184 IBM XIV Storage System: Copy Se
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1514131211109876543210OKACID /Diag2
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An example of selecting which metho
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not presented to the XIV. Check you
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Figure 7-3 depicts a fabric-attache
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4. Enter another port (repeating st
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c. Name: Enter a cluster name in th
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Important: You cannot use the XIV d
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7.3.4 Create and activate a data mi
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Important: If this is an online mig
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►►►►►►►►Define host
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4. Click New for a new system varia
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- Source LUN: Enter the decimal val
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The rate parameters can only be set
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eing generated by the migration pro
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If you chose to allow the XIV to de
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that volume must have been deleted
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►The volume on the source non-XIV
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7.10.4 Back-out after a data migrat
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TasknumberCompleted?Where toperform
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Using Microsoft calculator to conve
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7.12.3 HDS TagmaStore USPIn this se
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In Example 7-10 the XCLI commands s
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1011 0003 10.0 5001738000230153 Nex
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Using XIV DM to migrate an AIX file
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zone: nextrazap_dolly_fcs110:00:00:
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We now allocate the ESS 800 LUNS to
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We can also use a script provided b
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We then get a warning message. The
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8.1 Steps to take when using SVC mi
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When a partially populated XIV has
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8.3.3 Hardware dependenciesThere ar
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This leads to the following recomme
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8.4.3 Creating XIV volumes that are
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If your SVC uses firmware Version 5
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2. Define the SVC nodes to the XIV
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2. List the newly detected MDisks,
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8.7.2 Using VDisk mirroring to move
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8.8.2 Create the MDisk groupWe must
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8.9.2 Create the MDisk groupWe must
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In Example 8-42 we display the prog
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When an SVC volume is created we no
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In Example 8-55, we monitor the mig
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The VDisk moves from being in image
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the additional Fibre Channel ports
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TasknumberCompleted?Where toperform
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► Fibre Channel SAN Configuration
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DR testingGUI steps 179DS4000 190,
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RRDAC 227-228reactivation 111Recove
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emote mirroring peers 110remote tar
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IBM XIV Storage System: CopyService
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IBM XIV Storage System Copy Services and Migration

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