IBM XIV Storage System Copy Services and Migration

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Mirror synchronization statusSynchronization status is checked periodically and is independent of the mirroring process ofscheduling sync jobs. Refer to Figure 6-34 for a view of the synchronization states.Sync Job starts andreplicat es to Slave theMaster state at t 0Example: RPO = IntervalMasterSlaveIntervalt 0t 0’IntervalIn terv alt 2t 1t 1’Intervalt 3Intervalt4Intervalt nRPO_OKRPO_LaggingRPO_OKIf RPO is equal to or lower than thedifference between the current time(when the check is run) and thetimestamp of thelast_replicated_snapshot, then thestatus will be set to RPO_OKIf RPO is higher than the differencebetween the current time (when thecheck is calculated) and the timestamp ofthe last_replicated_snapshot, then thestatus will be set to RPO_LAGGINGFigure 6-34 Synchronization statesThe possible synchronization states are:► InitializationSynchronization does not start until the initialization completes.► RPO_OKSynchronization has completed within the specified sync job interval time (RPO).► RPO_LaggingSynchronization has completed but took longer than the specified interval time (RPO).6.7 Asynchronous mirror step-by-step illustrationIn the previous sections, the steps taken to set up, synchronize, and remove mirroring,utilizing both the GUI and the XCLI were explained. In this section we provide anasynchronous mirror step-by-step illustration.6.7.1 Mirror initializationAt this point, we are continuing after the setup illustrated in 6.1, “Asynchronous mirroringconfiguration” on page 150, which assumes that the Fibre Channel ports have been properlydefined as source and targets, the Ethernet switch has been updated to jumbo frames, and allthe physical paths are in place.176 IBM XIV Storage System: Copy Services and Migration
Mirrored volumes have been placed into a mirrored consistency group and the mirror hasbeen initialized and has a status of RPO OK. See Figure 6-35 and Figure 6-36.Figure 6-35 Master status after setupFigure 6-36 Slave status after setup6.7.2 Remote backup scenarioOne possible scenario related to the remote site is to provide a consistent copy of data that isused as a periodic backup. This backup copy could be copied to tape or used for data-miningactivities that do not require the most current data.This is accomplished by creating a duplicate of the last_replicated snapshot of the slaveconsistency group. This new snapshot can then be mounted to hosts and backed up to tapeor used for other purposes.Chapter 6. Asynchronous Remote Mirroring 177
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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
Page 142 and 143: 5.1 Synchronous mirroring configura
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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
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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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Page 174 and 175: Go to the Mirroring panel and verif
Page 176 and 177: -- Activate Mirror CGmirror_activat
Page 178 and 179: Change RPO and intervalThe required
Page 180 and 181: Deactivation on the masterTo deacti
Page 182 and 183: 6.2 Role reversalChanging roles can
Page 184 and 185: Slave peer consistencyWhen the user
Page 186 and 187: ►►A disaster that makes the who
Page 188 and 189: 6.5.2 Mirroring ongoing operationFo
Page 190 and 191: The sync job runs and the mirror st
Page 194 and 195: GUI steps to duplicate a snapshot g
Page 196 and 197: Figure 6-42 New master volumesAfter
Page 198 and 199: XCLI commands for DR testingFigure
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Page 204 and 205: An example of selecting which metho
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Page 208 and 209: Figure 7-3 depicts a fabric-attache
Page 210 and 211: 4. Enter another port (repeating st
Page 212 and 213: c. Name: Enter a cluster name in th
Page 214 and 215: Important: You cannot use the XIV d
Page 216 and 217: 7.3.4 Create and activate a data mi
Page 218 and 219: Important: If this is an online mig
Page 220 and 221: ►►►►►►►►Define host
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Page 224 and 225: - Source LUN: Enter the decimal val
Page 226 and 227: The rate parameters can only be set
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Page 230 and 231: If you chose to allow the XIV to de
Page 232 and 233: that volume must have been deleted
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Page 236 and 237: 7.10.4 Back-out after a data migrat
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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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242 IBM XIV Storage System: Copy Se
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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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