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Brian Nordland

Brian Nordland

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Code Block
CRTCRG CRG(GEOCRG) 
       CRGTYPE(*DEV) 
       RCYDMN((MN01 *PRIMARY *LAST MN ('192.0.2.100' '192.0.2.101'))
              (MN02 *BACKUP  1     MN ('192.0.2.110' '192.0.2.111'))
              (IA01WI01 *BACKUP  2     WI ('192.0.2.200' '192.0.2.201'))
              (IA02WI02 *BACKUP  3     WI ('192.0.2.202' '192.0.2.203'))) 
       CFGOBJ((MYIASP *DEVD *ONLINE))

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In environments where automatic failover is desired, it is possible to enhance automatic failover to monitor for additional events via a Hardware Management Console (HMC) using cluster monitors. See Advanced Node Failure Detection for additional information.

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  1. End the cluster resource group to configure replication to the next node. For example: ENDCRG CRG(GEOCRG)

  2. Use the Configure Geographic Mirroring (CFGGEOMIR) command to configure Geographic Mirroring replication to the additional node. For this example, the following command is used:

    Code Block
    CFGGEOMIR ASPDEV(MYIASP) 
          ACTION(*CREATE)
          DELIVERY(*ASYNC) 
          COMPRESS(*RESYNC) 
          TGTNODE(IA01WI01)

    This command configures Geographic Mirroring for the IASP named MYIASP to the node IA01WI01.
    Since IA02 WI01 is in a different site from the production system and is the lowest numbered node at that site, it is possible to specify asynchronous delivery, enabling further distances between the nodes.

  3. Since *SELECT was specified for the disk units, a panel showing all non-configured units is displayed on the target node. Use option 1 to select the disk units you want from the list.
    After confirming the selection, PowerHA will initialize and format the disk units on the target system and configure Geographic Mirroring.
    Since the default value for the start indicator parameter was left as *YES in the command, PowerHA will also start the cluster resource group, vary on the IASP on the production system if it was not already varied on, and start replication.

  4. This example would repeat this process starting at step 1 for the final node IA02WI02. With IA02WI02, a delivery value of *SYNC must be specified since synchronous replication will be used between the systems within the IA site containing nodes IA01 WI01 and IA02WI02.

Results

Geographic Mirroring is now configured between the nodes in the CRG. To verify and monitor the status of replication, use the Display ASP Session (DSPASPSSN) command. For example, DSPASPSSN SSN(GEOMIRSSN).