Load balancing input/output operations between two computers

A storage facility, comprising:

• a storage area network (SAN) having multiple network paths;
• a first computer comprised in the SAN and having multiple local ports and configured:
• to split an input/output (I/O) request for a remote logical volume into sub-requests,
• to convey a probe request defining an association between the I/O request and the sub-requests,
• to assign each of the sub-requests to a respective one of the multiple network paths,
• and to convey each of the sub-requests to the remote volume via the assigned respective one of the multiple network paths;
• and
• a second computer comprised in the SAN and having multiple remote ports and configured:
• to store the remote logical volume,
• to receive the probe request,
• to receive the sub-requests via the multiple network paths,
• and to perform the sub-requests in response to the association.

A computer program product, the computer program product comprising:

• a non-transitory computer readable storage medium having computer readable program code embodied therewith, the computer readable program code comprising:
• computer readable program code configured to identify, by a first computer, multiple network paths to a second computer;
• computer readable program code configured to split an input/output (I/O) request for a logical volume stored on the second computer into sub-requests;
• computer readable program code configured to convey, to the second computer, a probe request defining an association between the I/O request and the sub-requests;
• computer readable program code configured to assign each of the sub-requests to a respective one of the multiple network paths;
• computer readable program code configured to convey each of the sub-requests to the second computer via the assigned respective one of the multiple network paths;
• computer readable program code configured to receive, by the second computer via the multiple network paths, the sub-requests;
• and
• computer readable program code configured to perform, by the second computer, the sub-requests in response to the association.