Computational storage device and operation method of computation system

A computational storage device, comprising:

• an interface that exchanges a signal with a first external source;
• a non-volatile memory device;
• a storage controller that controls the non-volatile memory device;
• a device memory;
• and
• a computation engine that processes data loaded on the device memory,
• wherein the interface receives an indirect usage request instructing the computation engine to perform a second computation for second input data stored in the non-volatile memory device from a second external source while performing a first computation for first input data acquired from the first external source, and
• the computation engine stops the first computation in response to the indirect usage request, performs the second computation for the second input data loaded from the non-volatile memory device to the device memory, outputs result data generated by completing the second computation to the second external source through the interface, and resumes the stopped first computation.

A method of operating a computation system, comprising:

• receiving first input data and a direct usage request from a first host by a first computational storage device, and performing a first computation for the first input data in response to the direct usage request;
• receiving an indirect usage request for second input data stored in a non-volatile memory device of the first computational storage device from a second host while performing the first computation by the first computational storage device;
• providing the first input data, first intermediate data generated when performing the first computation, and request information for the direct usage request to a second computational storage device in response to the indirect usage request by the first computational storage device, loading the second input data from the non-volatile memory device, performing a second computation for the loaded second input data, and providing second result data generated when completing the second computation to the second host;
• and
• performing the first computation for unprocessed data among the first input data based on the request information and the first input data by the second computational storage device, generating first result data by accumulating a first computation result of the unprocessed data to the first intermediate data, and providing the first result data to the first host.