Memory system and operation method thereof

An operation method for storing maximum M commands in each of K memory devices based on maximum N commands received from a host and performing each set operation in response to the maximum M commands in order of input, the operation method comprises:

• sequentially storing the maximum N commands from the host in a set storage space;
• and
• resetting execution sequences of the maximum N commands stored in the set storage space based on execution information regarding each of the maximum N commands stored in the set storage space and the maximum M commands stored in each of the K memory devices whenever the commands received from the host are stored in the set storage space, and distributing the reset maximum N commands to the K memory devices,
• wherein the execution information comprises a logical address, a physical address, a length, and a use time of a corresponding command,
• wherein the resetting of the execution sequences of the maximum N commands and the distributing of the reset maximum N commands to the K memory devices comprise:
• setting a memory device having a relatively short time required to use all the maximum M commands stored in each of the K memory devices to a first resetting memory device having a high first priority, and setting remaining memory devices except for the first resetting memory device to a second resetting memory device having a low first priority;
• and
• setting the command that belongs to the maximum N commands stored in the set storage space and that corresponds to the first resetting memory device to a first resetting command, and setting the command that belongs to the maximum N commands stored in the set storage space and that corresponds to the second resetting memory device to a second resetting command,
• wherein N is a natural number greater than 2, K is a natural number greater than 2, and M is a natural number greater than 1.