Method and apparatus for scheduling i/o request, electronic device, storage medium, system and computer program product

An apparatus for scheduling an I/O request, the apparatus comprising:

• a memory storing one or more instructions;
• and
• a processor operatively coupled to the memory and configured to execute one or more instructions stored in the memory,
• wherein the one or more instructions, when executed by the processor, cause the apparatus to:
• acquire information of a pending I/O request, wherein the pending I/O request comprises a first I/O request suspended in a current command queue and/or a request queue, and the information of the pending I/O request comprises a request type contained in the pending I/O request;
• adjust a first preset threshold value based on the acquired information of the pending I/O request, wherein the first preset threshold value is a quantity threshold value for a readahead request among a second I/O request in the request queue scheduled from a virtual file system to a block layer;
• schedule the I/O request in the request queue scheduled from the virtual file system to the block layer based on the adjusted first preset threshold value.