Bug Reference
Branch
4.4, Master
Introduction
Network throttling is the process of controlling the network access and bandwidth usage based on certain rules. It controls the maximum bandwidth which can be allocated to VM. The benefit here is that you may have very noisy VMs on host that consume a lot of bandwidth, and they can be stepped down yet still given an adequate amount of connectivity.
Purpose
This is functional specification for Enabling Network throttling for VMs on Hyper-V
References
- Network Throttling in CloudStack
- QoS Overview for Windows Server 2012 R2
- Msvm_EthernetSwitchPortBandwidthSettingData class
Document History
Author | Description | Date |
|---|---|---|
| Anshul Gangwar | Incorporating comments. | 03/27/2014 |
| Rajesh Battala | Initial Revision |
Glossary
VM - virtual machine running on hypervisor
NIC - network interface controller which is attached to VM
Feature Specifications
- Currently network rate parameter which is passed during deployment of VM is not honored in Hyper-V. With this we will apply that parameter to maximum bandwidth allowed for VM. This parameter will be applied to NIC and controls the max data transfer date rate of the NIC and will apply to both ingress and egress traffic combined .
- One can see whether settings got applied successfully by verifying the VM -> settings--> network adapter --> bandwidth management --> maximum bandwidth in Hyper-V Manager.
- To see how network throttling rate applies on VM see network throtling .
Use cases
With this we can control the max bandwidth allocated for VM, which helps in controlling the bandwidth alloction to noisy VMs which otherwise may consume the whole bandwidth and degrades the performance
Architecture and Design description
Web Services APIs
No new APIs are added for this feature. Existing APIs which will be used for this feature are
- createNetworkOffering, one can specify the networkrate for network throttling
- createServiceOffering, one can specify the networkrate for network throttling
To see how network throttling rate applies on VM see network throtling .
UI flow
No new UI screens are introduced by this feature. Also, no changes need to be made in UI for enabling network throttling for VMs on Hyper-V. The UI workflow looks as follows.
Specifying Network Rate
There are two places where one can specify the network rate for network throttling
- One can specify network rate parameter while creating service offering
- One can specify network rate parameter while creating network offering
To see how network throttling rate applies on VM see network throtling .
IP Clearance
No IP dependencies are introduced by this feature.
Appendix
Appendix A:
Appendix B: