Method and device for scheduling virtual disk input and output ports

A device for scheduling virtual disk input and output (I/O) ports, comprising:

• at least one processor configured to:
• assign a set of service quality ratings to a corresponding set of virtual disk I/O ports based on a set of reading-writing bandwidth quotas associated with the corresponding set of virtual disk I/O ports in a physical machine;
• determine a total forecast value of a data bandwidth to be used by a plurality of reading-writing requests within a current time segment and determine virtual disk I/O ports corresponding to the plurality of reading-writing requests;
• allocate reading-writing bandwidth limits to the virtual disk I/O ports corresponding to the plurality of reading-writing requests, including allocating the total forecast value of the data bandwidth to different virtual disk I/O ports according to a proportion of a service quality rating of a virtual disk I/O port of the total forecast value, wherein the allocating of the reading-writing bandwidth limits to the virtual disk I/O ports comprises to:
• allocate a first token container bucket to a first virtual disk I/O port, the first token container bucket comprising a plurality of token containers, and a capacity of each token container corresponding to a size of a corresponding reading-writing bandwidth limit allocated to the first virtual disk I/O port used to control scheduling of the virtual disk I/O ports;
• and
• schedule virtual disk I/O ports on the physical machine based at least in part on actual bandwidths to be used by the plurality of reading-writing requests within the current time segment and the reading-writing bandwidth limits for the virtual disk I/O ports corresponding to the plurality of reading-writing requests, wherein the scheduling of the virtual disk I/O ports comprises to:
• determine whether a number of bytes associated with the actual bandwidths to be used by the plurality of reading-writing requests for the current time segment exceeds a total capacity of the first token container bucket;
• and
• in response to a determination that the number of bytes for the current time segment exceeds the total capacity of the first token container bucket:
• delay performing the plurality of reading-writing requests until a total capacity of the first token container bucket in a subsequent time segment can accommodate the number of bytes;
• and
• a memory coupled to the at least one processor and configured to provide the at least one processor with instructions.

A computer program product for scheduling virtual disk input and output (I/O) ports, the computer program product being embodied in a tangible non-transitory computer readable storage medium and comprising computer instructions for:

• assigning a set of service quality ratings to a corresponding set of virtual disk I/O ports based on a set of reading-writing bandwidth quotas associated with the corresponding set of virtual disk I/O ports in a physical machine;
• determining a total forecast value of a data bandwidth to be used by a plurality of reading-writing requests within a current time segment and determining virtual disk I/O ports corresponding to the plurality of reading-writing requests;
• allocating reading-writing bandwidth limits to the virtual disk I/O ports corresponding to the plurality of reading-writing requests, including allocating the total forecast value of the data bandwidth to different virtual disk I/O ports according to a proportion of a service quality rating of a virtual disk I/O port of the total forecast value, wherein the allocating of the reading-writing bandwidth limits to the virtual disk I/O ports comprises:
• allocating a first token container bucket to a first virtual disk I/O port, the first token container bucket comprising a plurality of token containers, and a capacity of each token container corresponding to a size of a corresponding reading-writing bandwidth limit allocated to the first virtual disk I/O port used to control scheduling of the virtual disk I/O ports;
• and
• scheduling virtual disk I/O ports on the physical machine based at least in part on actual bandwidths to be used by the plurality of reading-writing requests within the current time segment and the reading-writing bandwidth limits for the virtual disk I/O ports corresponding to the plurality of reading-writing requests wherein the scheduling of the virtual disk I/O ports comprises:
• determining whether a number of bytes associated with the actual bandwidths to be used by the plurality of reading-writing requests for the current time segment exceeds a total capacity of the first token container bucket;
• and
• in response to a determination that the number of bytes for the current time segment exceeds the total capacity of the first token container bucket:
• delaying to perform the plurality of reading-writing requests until a total capacity of the first token container bucket in a subsequent time segment can accommodate the number of bytes.