Storage system with efficient data prefetch for multiple storage controllers

A computer program product comprising a non-transitory processor-readable storage medium having stored therein program code of one or more software programs, wherein the program code, when executed by at least one processing device comprising a processor coupled to a memory, causes the at least one processing device:

• to receive in a storage system from at least one host device an indication of a data size utilized in a multi-path layer of the host device to select paths for delivery of input-output operations to different storage controllers of the storage system;
• to determine in the storage system a prefetch data size based at least in part on the data size indication received from the host device;
• and
• responsive to detection in the storage system of sequential data reads in input-output operations received from the host device, to prefetch from one or more backend storage devices of the storage system, into a memory associated with a particular one of the storage controllers of the storage system, an amount of data that is determined based at least in part on the prefetch data size.

A method comprising:

• receiving in a storage system from at least one host device an indication of a data size utilized in a multi-path layer of the host device to select paths for delivery of input-output operations to different storage controllers of the storage system;
• determining in the storage system a prefetch data size based at least in part on the data size indication received from the host device;
• and
• responsive to detection in the storage system of sequential data reads in input-output operations received from the host device, prefetching from one or more backend storage devices of the storage system, into a memory associated with a particular one of the storage controllers of the storage system, an amount of data that is determined based at least in part on the prefetch data size.