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

Fire drill configurations

VCS supports the Gold, Silver, and Bronze fire drill configurations for the agent.

Note:

The values of the UseSnapshot, MountSnapshot, and RequireSnapshot attributes define the fire drill configuration.

Gold

Runs the fire drill on a snapshot of the target array. The replicated device keeps receiving writes from the primary.

Veritas recommends this configuration because it does not affect production recovery.

In the Gold configuration, VCS does the following:

  • Takes a snapshot of the replicated LUNS using the BCV/TGT/VDEV device on the target array.

  • Modifies the disk group name in the snapshot.

  • Brings the fire drill service group online using the snapshot data.

For non-replicated Symmetrix devices:

  • You must use Veritas Volume Manager.

  • You must use the Gold configuration without the option to run in the Bronze mode.

Silver

VCS takes a snapshot, but does not run the fire drill on the snapshot data. VCS breaks replication and runs the fire drill on the replicated target device.

If a disaster occurs while resynching data after running the fire drill, you must switch to the snapshot for recovery.

In the Silver configuration, VCS does the following:

  • Takes a snapshot of the replicated LUNS using the BCV/TGT/VDEV device on the target array.

  • Modifies the disk group name in the snapshot.

  • Brings the fire drill service group online using the data on the target array; the agent does not use the snapshot data for the fire drill.

Bronze

VCS breaks replication and runs the fire drill test on the replicated target devices. VCS does not take a snapshot in this configuration.

If a disaster occurs while resynching data after the test, it may result in inconsistent data as there is no snapshot data.

In the Bronze configuration, VCS does the following:

  • Splits replication.

  • Modifies the disk group name while importing.

  • Brings the fire drill service group online using the data on the target array.