Storage system and method for allocating resource

A method in a storage system, the storage system coupled to a file client device having a file interface and a block client device having a block interface, and the storage system comprising a storage device, and a central processing unit (CPU) as physical resources which are available for use by a block Operating System (OS) for a block type Input/Output (I/O) and by a hypervisor for creating at least one logical partition, the method comprising the steps of:

• taking, by the block OS, a first part of the physical resources, including at least a first part of the CPU, as physical resources for processing the block type I/O;
• after the taking of the first part of the physical resources by the block OS, taking, by the hypervisor, a second part of the physical resources, including at least a second part of the CPU and not taken by the block OS, as physical resources for the hypervisor;
• creating the at least one logical partition, by the hypervisor, from the physical resources in the second part of the physical resources;
• and
• processing, by a file OS, a file type I/O on the at least one logical partition created by the hypervisor,
• wherein in response to a first write request sent from the block client device, the block OS is configured to store write data corresponding to the first write request in the storage device without involvement of the hypervisor, and
• wherein in response to a second write request sent from the file client device, the file OS is configured to send a command based on the second write request to the block OS, and the block OS is configured to store write data corresponding to the second write request in the storage device according to the command.

A storage system, comprising:

• a storage device;
• a central processing unit (CPU) as physical resources which are available for use by a block Operating System (OS) for a block type Input/Output (I/O) and by a hypervisor for creating at least one logical partition,
• wherein the block OS takes a first part of the physical resources, including at least a first part of the CPU, as physical resources for processing the block type I/O, and, the hypervisor takes a second part of the physical resources, including at least a second part of the CPU and not taken by the block OS, as physical resources for the hypervisor after the first part of the physical resources is taken by the block OS,
• wherein the hypervisor creates the at least one logical partition from the physical resources in the second part of the physical resources,
• wherein a file OS processes a file type I/O on the at least one logical partition created by the hypervisor,
• wherein in response to a first write request sent from a block client device, the block OS is configured to store write data corresponding to the first write request in the storage device without involvement of the hypervisor, and
• wherein in response to a second write request sent from the file client device, the file OS is configured to send a command based on the second write request to the block OS, and the block OS is configured to store write data corresponding to the second write request in the storage device according to the command.