Hybrid framework of NVMe-based storage system in cloud computing environment

A non-volatile memory (NVM) express (NVMe) system, comprising:

• at least one user application running in a virtual machine environment and including at least one user thread;
• an NVMe controller coupled to at least one NVM storage device, the NVMe controller comprising a driver that includes at least one device queue;
• and
• a hypervisor coupled to the user I/O queue of the user application and to the NVMe controller, the hypervisor enabling a private I/O channel between the user thread and a corresponding device queue in the driver of the NVMe controller that bypasses a queue in the hypervisor;
• wherein the hypervisor further selectively enables the private I/O channel between the user thread and the corresponding device queue in the driver of the NVMe controller or wherein the queue of the hypervisor is configured to be emptied in response to one or more false completion messages corresponding to one or more I/O requests and the user I/O queue of the at least one user application is configured to send I/O requests to the at least one device queue based on the queue of the hypervisor being emptied.

A non-volatile memory (NVM) express (NVMe) system, comprising:

• at least one user application running in a virtual machine environment and including a user input/output (I/O) queue and at least one user thread;
• an NVMe controller coupled to at least one NVM storage device, the NVMe controller comprising a driver that includes at least one device queue;
• and
• a hypervisor comprising a queue coupled to the user I/O queue of the user application and to the NVMe controller, wherein the queue of the hypervisor is configured to be emptied in response to one or more false completion messages corresponding to one or more I/O requests, and the user I/O queue of the at least one user application is configured to send I/O requests to the at least one device queue based on the queue of the hypervisor being emptied, or the hypervisor selectively enables a private I/O channel between the user thread and a corresponding device queue in the driver of the NVMe controller that bypasses the queue in the hypervisor.