Method and device for processing read/write request in physical host

Abstract

The invention discloses a method and device for processing a read / write request in a physical host. After accessing the memory of at least one of virtual storage devices, the HOST polls one or more instruction sending queues of the at least one virtual storage device, thereby acquiring a first read / write request from the one or more instruction sending queues to execute a first forwarding operation on the first read / write request; the HOST acquires another first read / write request from the one or more instruction sending queues through the polling, thereby executing the first forwarding operation on the another first read / write request. Through the adoption of the method and device provided by the embodiment of the invention, the access speed of processing the read / write request in a virtual storage scene can be improved.

Description

[0001] The patent application for this invention claims the priority of the invention patent with the application number 201511028575.5 filed on December 31, 2015, and the content of the invention patent with the application number 201511028575.5 is included in this application document. technical field [0002] The invention relates to the field of computers, in particular to a method and device for processing read / write requests in a physical host and virtualization. Background technique [0003] Virtualization includes computing virtualization, network virtualization and storage virtualization, where storage virtualization is used to provide storage services for virtual machines. The performance of the storage service mainly depends on the access speed of the storage medium and the overhead of the storage software stack. With the development of storage hardware in recent years, high-speed storage media such as ssd (Solid State Drives, solid state drive), nvme (Non-Volatil...

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Problems solved by technology

[0006] It can be seen from the above that in the storage virtualization scenario, the processing process of the storage software stack is relatively complicated, which makes it time-consuming to process read / write requests and affects storage performance.

Especially as the access speed of storage media continues to increase, the overhead of the storage software stack is becoming more and more obvious. The proportion of the storage software stack in the entire I / O delay has already accounted for 19.3% under SSD, while the higher-speed DDR The consumption of the storage software stack under the NVM medium has reached 94.1%, which seriously affects the access speed of the storage medium, and also leads the storage software stack to become the bottleneck of storage performance improvement.

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