Updated on 2022-02-22 GMT+08:00

Executing a Planned Failover

Scenarios

A planned failover changes the disaster recovery direction of a protection group and switches services from the production site to the disaster recovery site.

Disaster recovery site servers are created using the latest available data and billed based on the server billing standards. If a server is still running during the planned failover, the system synchronizes all the server data of the current time point to the disaster recovery site server. If a server becomes faulty, some data may fail to synchronize and lose.

After a planned failover, the disaster recovery direction is from the disaster recovery site to the production site. Perform planned failovers based on your planned outages to ensure no data loss. For example, if you plan to power off the production site, perform a planned failover to switch services to the disaster recovery site.

After a planned failover, data is not automatically synchronized from the disaster recovery site to the production site, and protection is disabled for protected instances. To start data synchronization from the disaster recovery site to the production site, perform a reverse reprotection.

Prerequisites

  • The protection group contains protected instances.
  • Initial synchronization is completed for all the protected instances in the protection group, and the status of protected instances is Synchronizing, Synchronization finished, or Planned failover failed.
  • Protected instance services are running at the production site.

Precautions

During a planned failover, a primary NIC is configured for each disaster recovery site server. If a production site server uses a secondary NIC, you need to manually bind a secondary NIC for the corresponding disaster recovery site server on the server details page.

Procedure

  1. Log in to the management console.
  2. Click Service List and choose Storage > Storage Disaster Recovery Service.

    The Storage Disaster Recovery Service page is displayed.

  3. Choose Asynchronous Replication. In the right pane, locate the replica pair housing the protection group you want to execute a planned failover and click the number in the Protection Groups column.

    The Protection Groups tab page is displayed.

  4. In the navigation tree, choose the target protection group.

    The protection group details page is displayed.

  5. In the upper right corner of the basic information area, click Execute Planned Failover.

    The Execute Planned Failover page is displayed.

  6. Set the parameters as prompted.

    Table 1 Parameter description

    Parameter

    Description

    Example Value

    Protected Instance

    Select the protected instances you want to execute a planned failover.

    -

    Disaster Recovery Site Server

    Configure the disaster recovery site server information.

    • Specifications: Select the server specifications.
    • Name: Enter a server name.

      The name can contain a maximum of 64 characters, which may consist of letters, digits, underscores (_), hyphens (-), and periods (.). The name cannot contain spaces.

    • Subnet: Select the subnet where the server resides.
    • IP Address: Select how the server obtains an IP address.
      • Use existing: Select this option if the subnet selected is in the same CIDR Block as the production site server. This setting keeps the IP addresses on both servers consistent.
      • DHCP: IP addresses are automatically assigned by the system.
      • Manually Assign: Manually specify an IP address.
      NOTE:

      If disaster recovery site servers are configured in a batch, only DHCP is available. If disaster recovery site servers are configured individually, all options are available.

    -

  7. Click Next.
  8. Confirm the disaster recovery site server information and click Submit.