Common features of server virtualization software-High availability

? High Availability
High availability is a common function of server virtualization software when some physical hosts in a resource pool fail, and virtual machines on a failed physical host are started on other normal physical hosts in the resource pool, ensuring a secure and reliable resource pool running continuously.

The prerequisite for configuring high availability is to use shared storage to deploy virtual machine mirroring, when high availability is enabled, and when the system detects a host failure, the system will recreate the failed virtual machine on the normal compute node based on the configuration information. Highly available with the following configuration options, users can configure different rules to ensure maximum business continuity based on their actual business and networking.

Set maximum number of physical host failures

When the number of resource pool failed physical hosts exceeds the set value, the virtual machines on the failed physical host do not start on the other hosts, preventing other host overloads from causing more serious business disruption.

Set the sequence and delay time for virtual machine failure restarts

According to the business dependency, start the different fault virtual machine in the starting order, ensure the correctness of the business start-up, set the delay time to avoid the cnware system congestion caused by the concurrent startup virtual machine.

Set Virtual machine Restart mode

According to the importance of the virtual machine business, as well as the status of the system resources, according to priority restart, resources meet the restart and do not restart three rules to configure how the virtual machine starts.

Common features of server virtualization software-High availability