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

About cluster heartbeats

In a replicated data cluster, ensure robust heartbeating by using dual, dedicated networks over which the Low Latency Transport (LLT) runs. Additionally, you can configure a low-priority heartbeat across public networks.

In a global cluster, VCS sends ICMP pings over the public network between the two sites for network heartbeating. To minimize the risk of split-brain, VCS sends ICMP pings to highly available IP addresses. VCS global clusters also notify the administrators when the sites cannot communicate.

Hitachi TrueCopy/HP-XP arrays do not support a native heartbeating mechanism between the arrays. The arrays send a support message on detecting replication link failure. You can take appropriate action to recover from the failure and to keep the devices in a synchronized state. The TrueCopy/HP-XP-CA agent supports those actions that can automate the resynchronization of devices after a replication link outage is corrected.