Computer system, computer and method for performing thin provisioning capacity management in coordination with virtual machines
View Patent ↗In the computer system, a storage system provides a storage level virtual volume based on thin provisioning technology, to a physical server on which a virtual machine is defined. The storage system releases the area of the logical volume corresponding to the storage level virtual volume accessed by a virtual machine which is specified to be deleted, on the basis of storage level virtual volume conversion information which is managed by the storage system.
1. A computer system comprising:
a storage system including a storage device and a storage controller; and
a server computer providing a virtual machine,
wherein the storage controller is configured to:
manage a storage area of the storage device as a pool of a plurality of low-level storage areas,
provide a storage level virtual volume to the server computer, and
allocate at least one of the plurality of low-level storage areas from the pool to a part of the storage level virtual volume as certain low-level address areas in response to a write request, and
wherein the storage system is configured to:
receive a clear request specifying a block address range from the server computer,
identify a low-level address area corresponding to the block address range included in the clear request,
clear data corresponding to the identified low-level address area on the storage level virtual volume,
specify a low-level storage area corresponding to the identified low-level address area, and
release the specified low-level storage area to the pool.
2. The computer system according to claim 1 ,
wherein the storage controller is configured to send a completion report of the clear request to the server computer after releasing the specified low-level storage area to the pool.
3. The computer system according to claim 1 ,
wherein the block address range included in the clear request is a SCSI address.
4. The computer system according to claim 1 ,
wherein upon releasing the specified low-level storage area to the pool, the storage controller is further configured to change a status of the specified low-level storage area as an unallocated storage area in the pool.
5. The computer system according to claim 1 ,
wherein the block address range included in the clear request is a SCSI address.
6. The computer system according to claim 1 ,
wherein upon releasing the specified low-level storage area to the pool, the processor is further configured to change a status of the specified low-level storage area as an unallocated storage area in the pool.
7. A computer system comprising:
a storage device and a processor; and
wherein the processor is configured to:
manage a storage area of the storage device as a pool of a plurality of low-level storage areas,
manage a storage level virtual volume, and
allocate at least one of the plurality of low-level storage areas from the pool to a part of the storage level virtual volume as certain low-level address areas in response to a write request, and
wherein the computer storage system is configured to:
receive a clear request specifying a block address range,
identify a low-level address area corresponding to the block address range included in the clear request,
clear data corresponding to the identified low-level address area on the storage level virtual volume,
specify a low-level storage area corresponding to the identified low-level address area, and
release the specified low-level storage area to the pool.