Global Data Platform Metro-DR

This section answers questions that are related to Metro-DR in IBM Fusion HCI.

  1. What is the admin network?
    The default OpenShift® container network is referred to as the admin network.
  2. What is a daemon or storage network?
    The network that is used by scale on the 100GbE ports is called the storage/daemon network. All scale pods require an extra IP address on this interface.
  3. What is a submariner?
    Submariner is an open source software that is used to bring connectivity across the admin network of both sites.
  4. What are the site 1 and site 2 network requirements?
    Following are the site 1 and site 2 network requirements:
    1. The default pod IPs on the scale pods must be routable across both the sites.
    2. The storage IPs configured on the scale pods both sites must be routable.
    3. The tie breaker must be routable to both the sites and daemon network.
  5. What is a Tie Breaker?
    In a disaster recovery setup, tiebreaker is a mechanism that is used to resolve conflicts between replicated data or services. It determines which site must be considered the primary site during disasters like hardware failure, or other issues.

  6. How does Metro-DR ensures data consistency?
    Metro-DR ensures integrity and data consistency through synchronous data replication, that is, data is replicated on both sites always .

  7. How does Metro-DR perform failover and failback operations?
    Metro-DR performs failover and failback operations automatically, ensuring minimum disturbance to active services or data. In a disaster situation, failover occurs to the secondary site. After the primary site is healthy, failback is triggered to return services to the primary site.