IBM XIV Storage System Copy Services and Migration

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If your SVC uses firmware Version 5.1 or later, we simply use the svcinfo lsquorumcommand, as shown in Example 8-7.Example 8-7 Using the svcinfo lsquorum command on SVC code level 5.1 and laterIBM_2145:mycluster:admin>svcinfo lsquorumquorum_index status id name controller_id controller_name active0 online 0 mdisk0 0 DS6800_1 yes1 online 1 mdisk1 1 DS6800_1 no2 online 2 mdisk2 2 DS4700 noTo move the quorum disk function, we specify three MDisks that will become quorum disks.Depending on your MDisk group extent size, each selected MDisk must have between 272MB and 1024 MB of free space. Execute the svctask setquorum commands before you startmigration. If all available MDisk space has been allocated to VDisks then you will not be ableto use that MDisk as a quorum disk. Table 8-5 shows the amount of space needed on eachMDisk.Table 8-5 Quorum disk space requirements for each of the three quorum MDisksExtent size (in MB)Number of extentsneeded by quorumAmount of space per MDiskneeded by quorum16 17 272 MB32 9 288 MB64 5 320 MB128 3 384 MB256 2 512 MB1024 1 1024 MB2048 1 2048 MBIn Example 8-8 there are three free MDisks. They are 1520 GiB in size (1632 GB).Example 8-8 New XIV MDisks detected by SVCIBM_2145:SVCSTGDEMO:admin>svcinfo lsmdisk -filtervalue mode=unmanagedid name status mode capacity9 mdisk9 online unmanaged 1520.0 GB10 mdisk10 online unmanaged 1520.0 GB11 mdisk11 online unmanaged 1520.0 GBIn Example 8-9 the MDisk group is created using an extent size of 1024 MB.Example 8-9 Creating an MDIsk groupIBM_2145:SVCSTGDEMO:admin>svctask mkmdiskgrp -name XIV -mdisk 9:10:11 -ext 1024MDisk Group, id [4], successfully created254 IBM XIV Storage System: Copy Services and Migration
In Example 8-10 the MDisk group has 4,896,262,717,440 free bytes (1520 GiB x 3).Example 8-10 Listing the free capacity of the MDisk groupIBM_2145:SVCSTGDEMO:admin>svcinfo lsmdiskgrp -bytes 4free_capacity 4896262717440All three MDisks are set to be quorum disks, as shown in Example 8-11.Example 8-11 Setting XIV MDisks as quorum disksIBM_2145:SVCSTGDEMO:admin>svctask setquorum -quorum 0 mdisk9IBM_2145:SVCSTGDEMO:admin>svctask setquorum -quorum 1 mdisk10IBM_2145:SVCSTGDEMO:admin>svctask setquorum -quorum 2 mdisk11The MDisk group has now lost free space, as shown in Example 8-12.Example 8-12 Listing free space in the MDisk groupIBM_2145:SVCSTGDEMO:admin>svcinfo lsmdiskgrp -bytes 4free_capacity 4893041491968This means that free capacity fell by 3,221,225,472 bytes, which is 3 GiB or 1 GiB per quorumMDisk.Note: In this example all three quorum disks were placed on a single XIV. This may not bean ideal configuration. The Web tip referred to at the start of this section has more detailsabout best practice, but in short you should try and use more than one managed diskcontroller if possible.8.6 Configuring an XIV for attachment to SVCFirst we must configure the XIV.8.6.1 XIV setup stepsThe XIV GUI is remarkably easy to use, so we do not reproduce a series of XIV GUI images.This section provides the setup steps using the XIV XCLI. They are reproduced mainly toshow the flow of commands rather than to indicate a preference for XCLI over the XIV GUI.1. Define the SVC cluster to the XIV as in Example 8-13. An SVC cluster consists of severalnodes, with each SVC node being defined as a separate host.Example 8-13 Define the SVC Cluster to the XIVcluster_create cluster="SVC_Cluster1"Chapter 8. SVC migration with XIV 255
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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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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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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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Page 244 and 245: In Example 7-10 the XCLI commands s
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Page 260 and 261: 8.1 Steps to take when using SVC mi
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Page 298 and 299: RRDAC 227-228reactivation 111Recove
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IBM XIV Storage System Copy Services and Migration

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