IBM XIV Storage System Copy Services and Migration

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7.3.4 Create and activate a data migration volume on XIVOnce the data migration volume has been tested the process of the actual data migration canbegin. When data migration is initiated, the data is copied sequentially in the background fromthe non-XIV storage system volume to the XIV. The host reads and writes data to the XIVstorage system without being aware of the background I/O being performed.Note: Once activated, the data migration can be deactivated, but after deactivating thedata migration the host is no longer able to read or write to the migration volume and allhost I/O stops. Do not deactivate the migration with host I/O running. If you want toabandon the data migration prior to completion consult the back-out process described insection 7.10, “Backing out of a data migration” on page 219.1. Activate the data migration.Right-click to select the data migration object/volume and choose Activate. This beginsthe data migration process where data is copied in the background from the non-XIVstorage system to the XIV. Activate all volumes being migrated so that they can beaccessed by the host. The host has read and write access to all volumes, but thebackground copy occurs serially volume by volume. If two targets (such as non-XIV1 andnon-XIV2) are defined with four volumes each, two volumes are actively copied in thebackground—one volume from non-XIV1 and another from non-XIV2. All eight volumesare accessible by the hosts.Figure 7-12 shows the menu choices when right-clicking the data migration. Note the TestData Migration, Delete Data Migration, and Activate menu items, as these are themost-used commands.Figure 7-12 Activate data migration2. Allocate volumes to the host.Once the data migration has been started, you can use the XIV GUI or XCLI to map themigration volumes to the host. When mapping volumes to hosts on the XIV, LUN ID 0 isreserved for XIV in-band communication. This means that the first LUN ID that younormally use is LUN ID 1. This includes boot-from-SAN hosts. You may also choose to usethe same LUN IDs as were used on the non-XIV storage, but this is not mandatory.Important: The host cannot read the data on the non-XIV volume until the datamigration has been activated. The XIV does not pass through (proxy) I/O for a migrationthat is inactive. If you use the XCLI dm_list command to display the migrations, ensurethat the word Yes appears in the Active column for every migration.200 IBM XIV Storage System: Copy Services and Migration
3. Bring the host server online.Once the volumes have been mapped to the host server, the host can be brought online.When the host boots up successfully and volume visibility has been verified, theapplication can be brought up and operations verified.Note: In clustered environments, it is usually recommended that only one node of thecluster be initially brought online after the migration is started, and that all other nodesbe offline until the migration is complete. Once complete, update all other nodes (driver,host attachment package, and so on), as the primary node was during the initial outage(see step 5 in “Perform pre-migration tasks for the host being migrated” on page 196).4. Data migration progress.Figure 7-13 shows the progress of the data migrations. The status bar can be toggledbetween GB remaining, percent complete, and hours/minutes remaining. Figure 7-13shows four data migrations, one of which has started background copy and three of whichhave not. Only one migrations is being copied at this same time because there is only onetarget (ITSO_DS4700_Ctrl_B).Figure 7-13 Data migration progress7.3.5 Complete the data migration on XIVTo complete the data migration, perform the following sequence of steps:1. SynchronizationAfter all of a volume’s data has been copied, the data migration achieves synchronizationstatus. After synchronization is achieved, all read requests are served by the XIV StorageSystem. If source updating was selected the XIV will continue to write data to both itselfand the outgoing storage system until the data migration is deleted. Figure 7-14 depicts acompleted migration.Figure 7-14 Data migration complete2. Delete data migration. Once the synchronization has been achieved, the data migrationobject can be safely deleted without host interruption.Chapter 7. Data migration 201
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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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5. The completion window shown in F
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To perform a VSS snapshot backup of
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CLUSTERnodePASSWORDAccessNOGenerate
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To see a list of the available VSS
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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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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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