Leveraging host accelerator resources to reduce storage system computational load

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 obtain in a host device deduplication information relating to a logical storage device of a storage system, wherein the host device comprises acceleration resources and is configured to communicate with the storage system over at least one network, wherein obtaining the deduplication information in the host device comprises the host device requesting the deduplication information from the storage system and receiving the deduplication information from the storage system in response to the request, the deduplication information being stored by the storage system in a storage-side data structure in association with an identifier of the logical storage device and comprising one or more statistical measures characterizing results of one or more deduplication operations previously performed in the storage system for at least a subset of a plurality of data blocks of the logical storage device;
• and
• to determine based at least in part on the obtained deduplication information whether to compute a content-based signature for one or more of the plurality of data blocks of the logical storage device utilizing the acceleration resources of the host device, wherein utilization of the acceleration resources of the host device is controlled by the host device based at least in part on the obtained deduplication information comprising the one or more statistical measures characterizing the results of the one or more deduplication operations previously performed in the storage system;
• wherein responsive to an affirmative result of the determining, the content-based signature is computed utilizing the acceleration resources of the host device and sent by the host device to the storage system in association with a given write operation that targets the one or more data blocks of the logical storage device;
• and
• wherein responsive to a negative result of the determining, the content-based signature is not computed utilizing the acceleration resources of the host device and the given write operation is sent by the host device to the storage system without the content-based signature.

A method comprising:

• obtaining in a host device deduplication information relating to a logical storage device of a storage system, wherein the host device comprises acceleration resources and is configured to communicate with the storage system over at least one network, wherein obtaining the deduplication information in the host device comprises the host device requesting the deduplication information from the storage system and receiving the deduplication information from the storage system in response to the request, the deduplication information being stored by the storage system in a storage-side data structure in association with an identifier of the logical storage device and comprising one or more statistical measures characterizing results of one or more deduplication operations previously performed in the storage system for at least a subset of a plurality of data blocks of the logical storage device;
• and
• determining based at least in part on the obtained deduplication information whether to compute a content-based signature for one or more of the plurality of data blocks of the logical storage device utilizing the acceleration resources of the host device, wherein utilization of the acceleration resources of the host device is controlled by the host device based at least in part on the obtained deduplication information comprising the one or more statistical measures characterizing the results of the one or more deduplication operations previously performed in the storage system;
• wherein responsive to an affirmative result of the determining, the content-based signature is computed utilizing the acceleration resources of the host device and sent by the host device to the storage system in association with a given write operation that targets the one or more data blocks of the logical storage device;
• and
• wherein responsive to a negative result of the determining, the content-based signature is not computed utilizing the acceleration resources of the host device and the given write operation is sent by the host device to the storage system without the content-based signature.