IBM XIV Storage System Copy Services and Migration

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The GUI also lets you specify the deletion priority when you create the snapshot. Instead ofselecting Create Snapshot, you select Create Snapshot (Advanced), as shown inFigure 1-17).Figure 1-17 Create Snapshot AdvancedA panel is presented that allows you to specify the deletion priority, but it also allows you touse your own volume name for the snapshot.Figure 1-18 Advanced snapshot options1.2.4 Restore a snapshotThe XIV Storage System provides the ability to restore the data from a snapshot back to themaster volume, which can be helpful for operations where data was modified incorrectly andyou want to restore the data. From the Volumes and snapshots view, right-click the volumeand click Restore. This action opens a dialog box where you can select which snapshot is tobe used to restore the volume. Click OK to perform the restoration.14 IBM XIV Storage System: Copy Services and Migration
Figure 1-19 illustrates selecting the Restore action on the ITSO_Volume volume.Figure 1-19 Snapshot volume restoreAfter you perform the restore action, you return to the Volumes and snapshots panel. Theprocess is instantaneous, and none of the properties (creation date, deletion priority, modifiedproperties, or locked properties) of the snapshot or the volume have changed.Specifically, the process modifies the pointers to the master volume so that they areequivalent to the snapshot pointer. This change only occurs for partitions that have beenmodified. On modification, the XIV Storage System stores the data in a new partition andmodifies the master volume’s pointer to the new partition. The snapshot pointer does notchange and remains pointing at the original data. The restoration process restores the pointerback to the original data and frees the modified partition space.If a snapshot is taken and later on the original volume increases in size, you can still do arestore operation. The snapshot still has the original volume size and when you restore it tothe original volume this volume also will have the original size again.The XCLI Session (or XCLI command) provides more options for restoration than the GUI.With the XCLI, you can restore a snapshot to a parent snapshot (Example 1-4).Example 1-4 Restoring a snapshot to another snapshotsnapshot_restore snapshot=ITSO_Volume.snapshot_00002target_snapshot=ITSO_Volume.snapshot_000011.2.5 Overwriting snapshotsFor your regular backup jobs you can decide whether you always want to create newsnapshots (and let the system delete the old ones) or whether you prefer to overwrite theexisting snapshots with the latest changes to the data. For instance, a backup applicationrequires the latest copy of the data to perform its backup operation. This overwrite operationmodifies the pointers to the snapshot data to be reset to the master volume. Therefore, allChapter 1. Snapshots 15
Page 1: Front coverIBM XIV Storage System:C
Page 4: Note: Before using this information
Page 8 and 9: 7.9.4 Host server cannot access the
Page 10 and 11: viiiIBM XIV Storage System: Copy Se
Page 12 and 13: TrademarksIBM, the IBM logo, and ib
Page 14 and 15: Recovery Program at the Pentagon fo
Page 16 and 17: Comments welcomeYour comments are i
Page 18 and 19: 1.1 Snapshots architectureBefore we
Page 20 and 21: A logical volume is represented by
Page 22 and 23: If you know in advance that an auto
Page 24 and 25: An application can utilize many vol
Page 26 and 27: Note: The creation date of the dupl
Page 28 and 29: Along with these properties, the tr
Page 32 and 33: pointers to the original data are l
Page 34 and 35: For the second scenario, the origin
Page 36 and 37: Figure 1-28 no longer displays the
Page 38 and 39: To examine the details of the scena
Page 40 and 41: Restriction: Volumes in a consisten
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Page 44 and 45: The new snapshots are created and d
Page 46 and 47: To obtain details about a consisten
Page 48 and 49: Example 1-12 illustrates the snap_g
Page 50 and 51: 1.5 MySQL database backup exampleMy
Page 52 and 53: Before running the backup script, a
Page 54 and 55: # XCLI command to perform the backu
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Page 58 and 59: 2.1 OverviewThis section includes a
Page 60 and 61: Figure 2-2 shows the Tivoli Storage
Page 62 and 63: ►For exchange data, the Microsoft
Page 64 and 65: 2.4.1 XIV VSS Provider installation
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64 IBM XIV Storage System: Copy Ser
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3.1 Volume copy architectureThe vol
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Figure 3-2 provides an example of t
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After the copy is complete, power u
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4.1 XIV Remote Mirroring overviewTh
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►Host read operations are perform
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Figure 4-4 shows remote mirror conn
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4.2.2 Operational proceduresMirrori
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After mirroring has been implemente
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4.3 XIV Remote Mirroring usageRemot
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►Metro region plus out-of-region
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Figure 4-15 shows an XIV local snap
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►XIV target configuration: synchr
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►XIV target configuration: bi-dir
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Connections must be made between po
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In Figure 4-28, five of the seven e
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If multiple volumes will have depen
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there are certain additional constr
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In synchronous mirroring, during st
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4.4.11 Mirror reactivation and resy
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►►The volume mirroring settings
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4.4.16 Deleting mirror coupling def
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10.Unmap master peers at XIV 2 from
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6. Remove connectivity between the
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4.7 Advantages of XIV mirroringXIV
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As seen in Example 4-1, in the Role
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hover the mouse over a port, as sho
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Selecting Configure opens a configu
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Connections are easily defined by c
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4.11.3 XCLI examplesXCLI commands c
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124 IBM XIV Storage System: Copy Se
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5.1 Synchronous mirroring configura
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- Slave CG / VolumeThis is the name
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2. On the Secondary XIV go to the R
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Adding a mirrored volume to a mirro
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5.3 Role reversalWith synchronous m
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uncommitted data, and it is the res
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►►The local site recoveryThe ol
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Example 5-8 List mirror couplingsFi
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5.5.3 Phase 3: recovery of the prim
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Reactivating the remote mirror coup
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5.5.4 Phase 4: switching production
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5. Reassign volumes back to the pro
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6.1 Asynchronous mirroring configur
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The slave volume must be unlocked a
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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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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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