Data storage system performing data relocation based on temporal proximity of accesses

A data storage system, comprising:

• a storage controller configured to perform:
• the storage controller receiving a first access request requesting access to first data and a second access request requesting access to second data, wherein both the first data and the second data are accessed via a first hardware channel;
• in response to detecting receipt of the first and second access requests within a same service window defining a range of temporal proximity, the storage controller recording an association of identifiers of the first data and second data requested by the first and second access requests as an access pair in an access data structure, wherein the access data structure tracks a number of occurrences the access pair of the first and second access requests were detected within the same service window;
• and
• the storage controller thereafter periodically analyzes the access data structure, and determines to migrate the second data accessed by the second access request from the first storage device to a candidate storage device based on the recorded association when the number of occurrences for the access pair in the access data structure exceeds a migration threshold;
• and
• the storage controller, in response to determining to migrate the second data, migrating the second data from the first storage device to the candidate storage device, such that the first and second data are available for access via different hardware channels.

A computer program product, the computer program product comprising a non-transitory computer readable storage medium having program instructions embodied therewith, the program instructions executable by a storage controller to cause the storage controller to perform:

• the storage controller receiving a first access request requesting access to first data and a second access request requesting access to second data, wherein both the first data and the second data are accessed via a first hardware channel;
• in response to detecting receipt of the first and second access requests within a same service window defining a range of temporal proximity, the storage controller recording an association of identifiers of the first data and second data requested by the first and second access requests as an access pair in an access data structure, wherein the access data structure tracks a number of occurrences the access pair of the first and second access requests were detected within the same service window;
• and
• the storage controller thereafter periodically analyzes the access data structure, and determines to migrate the second data accessed by the second access request from the first storage device to a candidate storage device based on the recorded association when the number of occurrences for the access pair in the access data structure exceeds a migration threshold;
• and
• the storage controller, in response to determining to migrate the second data, migrating the second data from the first storage device to the candidate storage device, such that the first and second data are available for access via different hardware channels.