Storage device processing stream data, system including the same, and operation method

A storage device comprising:

• an interface configured to communicate commands and exchange data with a host device disposed separate from the storage device;
• a first solid state drive (SSD) including a first nonvolatile memory and a first buffer, the first SSD configured to sequentially load first stream data from the first nonvolatile memory to the first buffer responsive to a first streaming access command received at the interface;
• a second solid state drive (SSD) including a second nonvolatile memory and a second buffer, the second SSD configured to sequentially load second stream data from the second nonvolatile memory to the second buffer responsive to a second streaming access command received at the interface,
• wherein the first buffer is registered at a first streaming region of a virtual memory space in the host device, and the second buffer is registered at a second streaming region of the virtual memory space in the host device;
• and
• a direct memory access (DMA) engine configured to access the first stream region of the virtual memory space in the host device to read the first stream data loaded in the first buffer,
• wherein the interface is configured to send the read first stream data to the host device.

A storage device comprising:

• a first solid state drive (SSD) including a first nonvolatile memory and a first buffer, the first SSD being configured to receive a first streaming access command including a first logical block address (LBA) list and a first chunk size, to fetch a first stream data from the first nonvolatile memory requested according to the first LBA list and the first chunk size, and to sequentially load the first stream data onto the first buffer;
• a second solid state drive (SSD) including a second nonvolatile memory and a second buffer, the second SSD being configured to receive a second streaming access command including a second logical block address (LBA) list and a second chunk size, to fetch a second stream data from the second nonvolatile memory requested according to the second LBA list and the second chunk size, and to sequentially load the second stream data onto the second buffer;
• and
• an in-storage computing block configured to sequentially read the first stream data loaded onto the first buffer in units of the first chunk size using mapping of the first buffer,
• wherein the first buffer is registered at a first streaming region of a virtual memory space of an external device,
• the second buffer is registered at a second streaming region of the virtual memory space of the external device, and
• the first streaming access command includes a first stream identifier (ID) of the first stream data and first priority, the first LBA list corresponds to all logical addresses of the first stream data, the first chunk size defines a management unit of the first stream data, and the first priority is assigned to the first stream identifier.