Hello, everyone!
FusionSphere monitors global resource usages during VM creation and running. In the monitoring process, FusionSphere uses an intelligent resource scheduling algorithm(DRS) to determine the optimal host on which the VMs can run, and it also migrates the VMs to this optimal host by means such as live migration, ensuring VM stability, and improving user experience.
What is DRS?
DRS uses intelligent scheduling algorithms to periodically monitor the work load on hosts in a cluster and migrates VMs between the hosts based on the work load to achieve load balancing. This feature collaborates with dynamic power management (DPM) to increase resource utilization and reduce power consumption.
When the system is lightly loaded, the system migrates some VMs to one or more physical hosts and powers off the idle hosts.
When the system is heavily loaded, the system starts some VMs and physical hosts and allocates VMs evenly on hosts to ensure resource supply.
Scheduled tasks can be set to enable different resource scheduling policies at different times based on the system running status to meet user requirements in different scenarios.
Technical features
Automatically balance the load of the VMs in a cluster based on a scheduling policy.
Use a proper scheduling algorithm that considers VM load changes, preventing repeated VM migration between hosts.
Provide the unique scheduling baseline setting function, preventing unnecessary migration.
Configure an exception item, such as no scheduling or manual scheduling, for the VM with special requirements.
Allow administrators to perform manual scheduling and periodic automated scheduling based on policies.
Support the configuration of a scheduling policy daily, weekly, or monthly.
Application scenarios & customer benefits
This feature applies to scenarios where VM loads continuously change with sudden fluctuations, and better performance experience is required.
VMs are dynamically scheduled to balance the host resource usage, compute capability is fully utilized, and the service system running on each VM is more efficient.
Dependency
Dynamic resource scheduling does not take effect on the following types of VMs:
A VM that has been bound to a host
A VM that has been bound to a USB flash drive
A VM that has been bound to a passthrough device
A VM that has been bound to GPU resource group (in the x86 architecture)
That's all, thanks!
