InfoScale™ 9.0 Cluster Server Agent for Hitachi TrueCopy/HP-XP Continuous Access Configuration Guide - Windows

Last Published:
Product(s): InfoScale & Storage Foundation (9.0)
Platform: Windows
  1. Introducing the agent for Hitachi TrueCopy/Hewlett-Packard XP Continuous Access
    1.  
      About the agent for Hitachi TrueCopy/HP-XP Continuous Access
    2.  
      Supported software
    3.  
      Supported hardware
    4.  
      Typical Hitachi TrueCopy/Hewlett-Packard XP Continuous Access setup in a VCS cluster
    5. Hitachi TrueCopy/Hewlett-Packard XP Continuous Access agent functions
      1.  
        About the Hitachi TrueCopy/Hewlett-Packard XP Continuous Access agent's online function
  2. Configuring the agent for Hitachi TrueCopy/Hewlett-Packard XP Continuous Access
    1. Configuration concepts for the Hitachi TrueCopy/Hewlett-Packard XP Continuous Access agent
      1.  
        Resource type definition for the Hitachi TrueCopy agent
      2. Attribute definitions for the TrueCopy/HP-XP-CA agent
        1. About the SplitTakeover attribute for the Hitachi TrueCopy agent
          1.  
            SplitTakeover attribute = 0
          2.  
            SplitTakeover attribute = 1
        2. About the FreezeSecondaryOnSplit attribute for the Hitachi TrueCopy agent
          1.  
            FreezeSecondaryOnSplit attribute = 0
        3.  
          About the HTC configuration parameters
        4.  
          Special consideration for fence level NEVER
        5.  
          Considerations for calculating the AllowAutoFailoverInterval attribute value
      3.  
        Sample configuration for the TrueCopy/HP-XP-CA agent
    2. Before you configure the agent for Hitachi TrueCopy/Hewlett-Packard XP Continuous Access
      1.  
        About cluster heartbeats
      2.  
        About configuring system zones in replicated data clusters
      3.  
        About preventing split-brain
    3. Configuring the agent for Hitachi TrueCopy/Hewlett-Packard XP Continuous Access
      1.  
        Configuring the agent manually in a global cluster
      2.  
        Configuring the agent manually in a replicated data cluster
  3. Testing VCS disaster recovery support with Hitachi TrueCopy/Hewlett-Packard XP Continuous Access
    1. How VCS recovers from various disasters in an HA/DR setup with Hitachi TrueCopy/Hewlett-Packard XP Continuous Access
      1.  
        Failure scenarios in global clusters
      2.  
        Failure scenarios in replicated data clusters
      3.  
        Replication link / Application failure scenarios
    2.  
      Testing the global service group migration
    3.  
      Testing disaster recovery after host failure
    4.  
      Testing disaster recovery after site failure
    5.  
      Performing failback after a node failure or an application failure
    6.  
      Performing failback after a site failure
  4. Setting up fire drill
    1.  
      About fire drills
    2. About the HTCSnap agent
      1.  
        HTCSnap agent functions
      2.  
        Resource type definition for the HTCSnap agent
      3.  
        Attribute definitions for the HTCSnap agent
      4.  
        About the Snapshot attributes
      5.  
        Sample configuration for a fire drill service group
    3.  
      Additional considerations for running a fire drill
    4.  
      Before you configure the fire drill service group
    5. Configuring the fire drill service group
      1.  
        About the Fire Drill wizard
    6.  
      Verifying a successful fire drill

Testing disaster recovery after site failure

Review the details on site failure and how VCS and the Cluster Server agent for Hitachi TrueCopy/Hewlett-Packard XP Continuous Access behave in response to the failure.

See Failure scenarios in global clusters.

See Failure scenarios in replicated data clusters.

Depending on the DR configuration, perform one of the following procedures to test the disaster recovery in the event of site failure.

To test disaster recovery for site failure in global cluster setup

  1. Halt all nodes and the arrays at the primary site.

    If you cannot halt the array at the primary site, then disable the replication link between the two arrays.

    The value of the ClusterFailOverPolicy attribute for the faulted global group determines the failover behavior of VCS.

    • Auto - VCS brings the faulted global group online at the secondary site.

    • Manual or Connected - You must bring the global group online at the secondary site.

      On a node in the secondary site, run the following command:

      hagrp -online -force global_group -any

  2. Verify that the HTC devices at the secondary site are write-enabled and the device state is SSWS.

  3. Verify that the global service group is online at the secondary site.
    hagrp -state global_group

To test disaster recovery for site failure in replicated data cluster setup

  1. Halt all hosts and the arrays at the primary site.

    If you cannot halt the array at the primary site, then disable the replication link between the two arrays.

    The value of the AutoFailOver attribute for the faulted global service group determines the VCS failover behavior.

    • 1 - VCS brings the faulted global service group online at the secondary site.

    • 2 - You must bring the global service group online at the secondary site.

      On a node in the secondary site, run the following command:

      hagrp -online service_group -sys sys_name

  2. Verify that the HTC devices at the secondary site are write-enabled and the device state is SSWS.

  3. Verify that the global service group is online at the secondary site.
    hagrp -state global_group