Microsoft Technology Licensing, LLC

Vivek P Divakara

Forrest Curtis Foltz

Hoi Huu Vo

Vivek Bhanu

Yimin Deng

Samer Arafeh

Yue Zuo

Hoyuen Chau

Kai Chen

Saad Syed

Melur K Raghuraman

Mian Naeem Ul Haque

Francis M David

Raghu Murthy

Suraj Puri

Samer N Arafeh

Melur Raghuraman

A virtual machine hosting environment executing on a physical machine is operable to instantiate a virtual machine that is capable of initiating I/O operations directed to a remote storage. The virtual machine hosting environment is operable to determine when an unavailability condition exists with respect to the remote storage and when such unavailability condition no longer exists. The virtual machine hosting environment is further operable to suspend the virtual machine based at least on the determination that the unavailability condition exists and to resume the virtual machine based at least on the determination that the unavailability condition no longer exists. The virtual machine hosting environment may be still further operable to save one or more pending I/O requests generated by the virtual machine in conjunction with pausing the virtual machine and to send the pending I/O request(s) to the remote storage in conjunction with resuming the virtual machine.

Mitigation of impact of intermittent storage unavailability on virtual machines

Computerized methods, systems, and computer-storage media for allowing virtual machines (VMs) residing on a common physical node to fairly share network bandwidth are provided. Restrictions on resource consumption are implemented to ameliorate stressing the network bandwidth or adversely affecting the quality of service (QoS) guaranteed to tenants of the physical node. The restrictions involves providing a scheduler that dynamically controls networking bandwidth allocated to each of the VMs as a function of QoS policies. These QoS policies are enforced by controlling a volume of traffic being sent from the VMs. Controlling traffic includes depositing tokens into token-bucket queues assigned to the VMs, respectively. The tokens are consumed as packets pass through the token-bucket queues. Upon consumption, packets are held until sufficient tokens are reloaded to the token-bucket queues.

Applying policies to schedule network bandwidth among virtual machines

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Bothell, WA, United States of America

Vivek P Divakara