Distributed storage location hinting for non-volatile memories

A non-transitory machine-readable storage medium comprising a plurality of instructions stored thereon that, in response to being executed, cause a host system to:

• obtain one or more location hints applicable to a range of logical block addresses of a received input/output (I/O) request for a storage subsystem coupled with the host system over a non-volatile memory express over fabric (NVMe-oF) interconnect;
• for each logical block address in the I/O request:
• apply a most specific location hint of the one or more location hints that matches that logical block address to identify a destination in the storage subsystem for the I/O request;
• when the most specific location hint is a consistent hash hint, process the consistent hash hint;
• forward the I/O request to the destination and return a completion status for the I/O request;
• when a location hint log page has changed, process the location hint log page;
• and
• when any location hint refers to NVMe-oF qualified names not included in an immediately preceding query by a discovery service, process the immediately preceding query again.

A system comprising:

• a storage subsystem;
• a non-volatile memory express over fabric (NVMe-oF) interconnect;
• and
• a host system coupled to the storage subsystem over the NVMe-oF interconnect, the host system to obtain one or more location hints applicable to a range of logical block addresses of a received input/output (I/O) request for the storage subsystem;
• for each logical block address in the I/O request:
• apply a most specific location hint of the one or more location hints that matches that logical block address to identify a destination in the storage subsystem for the I/O request;
• when the most specific location hint is a consistent hash hint, process the consistent hash hint;
• forward the I/O request to the destination and return a completion status for the I/O request;
• when a location hint log page has changed, process the location hint log page;
• and
• when any location hint refers to NVMe-oF qualified names not included in an immediately preceding query by a discovery service, process the immediately preceding query again.