Computer communication device with inter-device data copying

A computing system, comprising:

• a host;
• a storage device belonging to a same virtual layer as the host;
• a memory device storing an in-memory database (DB), the memory device belonging to the virtual layer;
• and
• a computer communication device configured to process a data transfer between the memory device and the storage device, wherein the memory device and the storage device are connected with each other and the host through ports of the computer communication device,
• wherein the computer communication device is configured to:
• receive, from the host, source information and destination information for a snapshot;
• determine that a first of the ports is associated with the source information in mapping information that comprises associations between the ports and host-managed device memory (HDM) addresses;
• obtain a read-value of a memory area corresponding to the source information from the memory device through the determined first port;
• determine that a second of the ports is associated with the destination information in the mapping information;
• and
• transmit the read-value for a write operation of writing in a memory area, in the storage device, that corresponds to the destination information, wherein the transmitting is based on peer-to-peer communication, to the storage device through the determined second port.

A method performed by a computing unit, comprising:

• receiving, from a host, source information and destination information for a data copy, the host belonging to a same virtual layer as a memory device and a storage device;
• obtaining a read-value of a memory area corresponding to the source information from the memory device through a port identified based on the source information and mapping information between ports of a computer communication device and host-managed device memory (HDM) addresses;
• and
• transmitting the read-value for a write operation of writing in a memory area corresponding to the destination information in the storage device, based on peer-to-peer communication, to the storage device through a port identified based on the mapping information and the destination information.