Cluster Server 7.4 Agent for EMC SRDF Configuration Guide - Windows

Last Published:
Product(s): InfoScale & Storage Foundation (7.4.1)
Platform: Windows
  1. Introducing the agent for EMC SRDF
    1.  
      About the agent for EMC SRDF
    2.  
      Supported hardware for EMC SRDF
    3.  
      Supported software
    4.  
      Typical EMC SRDF setup in a VCS cluster
    5. EMC SRDF agent functions
      1.  
        About the EMC SRDF agent's online function
      2.  
        About dynamic swap support for the EMC SRDF agent
    6.  
      Installing the agent for EMC SRDF
  2. Configuring the agent for EMC SRDF
    1. Configuration concepts for the EMC SRDF agent
      1.  
        Resource type definition for the EMC SRDF agent
      2. Attribute definitions for the SRDF agent
        1.  
          Required attributes
        2.  
          Optional attributes
        3.  
          Internal attributes
      3.  
        Sample configuration for the EMC SRDF agent
    2. Before you configure the agent for EMC SRDF
      1.  
        About cluster heartbeats
      2.  
        About configuring system zones in replicated data clusters
      3.  
        About preventing split-brain
    3. Configuring the agent for EMC SRDF
      1. Configuring the agent manually in a global cluster
        1.  
          Configuring the Symm heartbeat on each cluster
      2.  
        Configuring the agent manually in a replicated data cluster
      3.  
        Setting the OnlineTimeout attribute for the SRDF resource
      4.  
        Additional configuration considerations for the SRDF agent
  3. Testing VCS disaster recovery support with EMC SRDF
    1. How VCS recovers from various disasters in an HA/DR setup with EMC SRDF
      1.  
        Failure scenarios in global clusters
      2.  
        Failure scenarios in replicated data clusters
    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.  
      Fire drill configurations
    3. About the SRDFSnap agent
      1.  
        SRDFSnap agent functions
      2.  
        Resource type definition for the SRDFSnap agent
      3.  
        Attribute definitions for the SRDFSnap agent
      4.  
        About the Snapshot attributes
      5.  
        Sample configuration for a fire drill service group
    4.  
      Additional considerations for running a fire drill
    5.  
      Before you configure the fire drill service group
    6. Configuring the fire drill service group
      1.  
        About the Fire Drill wizard
    7.  
      Verifying a successful fire drill

Testing disaster recovery after host failure

Review the details on host failure and how VCS and the Cluster Server agent for EMC SRDF behave in response to the failure.

See Failure scenarios in global clusters.

See Failure scenarios in replicated data clusters.

Perform the procedure that is applicable to your DR configuration to test how VCS recovers after all hosts at the primary site fail.

To test disaster recovery for host failure in global cluster setup

  1. Halt the hosts at the primary site.

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

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

    • Manual or Connected - 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 -force global_group -any
  2. Verify that the global service group is online at the secondary site.
    hagrp -state global_group

  3. Verify that the SRDF devices at the secondary site are write-enabled and the device state is as follows:

    For static RDF

    FAILED OVER state

    For dynamic RDF

    The value of the SRDF resource attribute SwapRoles determines the device state:

    • 0 - FAILED OVER state

    • 1 - SYNCHRONIZED or CONSISTENT state

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

  1. Halt the hosts at the primary site.

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

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

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

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

      hagrp -online service_group -to sys_name
  2. Verify that the service group is online at the secondary site.
    hagrp -state global_group

  3. Verify that the SRDF devices at the secondary site are write-enabled and the device state is as follows:

    For static RDF

    FAILED OVER state

    For dynamic RDF

    The value of the SRDF resource attribute SwapRoles determines the device state:

    • 0 - FAILED OVER state

    • 1 - SYNCHRONIZED or CONSISTENT state