Multinode storage system and queue control method for multi node storage system

摘要

To provide a multi-node storage system with improved I/O performance without depleting a queue even when the number of processors performing I/O processing increases.SOLUTION: A multi-node storage system includes a plurality of nodes providing a volume to a computer as a logical storage area and including controllers that process an I/O request from the computer, and includes a plurality of NVMe drives PCI-connected to any one of the controllers of the nodes and a switch that connects the controllers of the plurality of nodes to each other, in which the controller includes a plurality of processors that process the I/O request from the computer and a memory. The memory includes, for each of the plurality of NVMe drives, virtual queues which are equal in number to processors of the plurality of controllers constituting the multi-node storage system and real queues that store a command in any one of the plurality of NVMe drives and that are smaller in number than the virtual queues.SELECTED DRAWING: Figure 3