IBM XIV Storage System Copy Services and Migration

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The sync job runs and the mirror status is maintained at the master system. If a previous syncjob is running, a new sync job will not start. The following actions are taken at the beginning ofeach interval:1. Most_recent snapshot is taken of the volume or consistency group:a. Host I/O is halted.b. The snapshot is taken to provide a consistent set of data to be replicated.c. Host I/O resumes.2. Changed data is copied to the slave:a. The difference between the most_recent and last_replicated snapshots is determined.b. This changed data is replicated to the slave.Refer to Figure 6-31.Sync job startsThe sync job data isbeing replicatedSync JobMaster peermost_recentSlave peerlast_replicat edlast_replicatedData to be replicatedLocalsiteRemotesiteFigure 6-31 Sync job starts174 IBM XIV Storage System: Copy Services and Migration
3. A new last_replicated snapshot is created on the slave. This snapshot preserves theconsistent data for later recovery actions if needed. Refer to Figure 6-32.Sync Job completed…and a new last_replicatedsnapshot is created thatrepresents the updated slavepeer’s state.Master peermost_recentSlave peerlast_replicat edlast_replicatedLocalsiteRemotesiteFigure 6-32 Sync job completes4. The most recent_snapshot is renamed on the master (Figure 6-33):a. The most recent data is now equivalent to the data on the slave.b. Previous snapshots are deleted.c. The most_recent snapshot is renamed to last_replicated.New master last_replicated snapshot createdIn one transaction - the master first deletes the currentlast_replicated snapshot (8)and the master then creates a new last_replicatedsnapshot from the most_recent snapshot (9).Interval sync process is now completeThe master and slave peers have an identical ‘restoretime point ‘ to which they can be reverted. This facilitatesamong other things mirror peer switching.Master peermost_recent > last_repli catedSlav e peerlast_replicatedlast_replicatedLocalsiteRemotesiteFigure 6-33 New master’s last replicated snapshotThe next sync job can now be run at the next defined interval.Chapter 6. Asynchronous Remote Mirroring 175
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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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Page 142 and 143: 5.1 Synchronous mirroring configura
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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
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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
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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
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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
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Page 230 and 231: If you chose to allow the XIV to de
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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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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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