US 2014/0195761 A1 · LOGICAL VOLUME SPACE SHARING

Abstract

Space sharing between logical volumes is achieved through a technique that enables available storage space to be flexibly consumed and released by the logical volumes. Each logical volume is associated with an address tree that defines how available storage space is consumed by the logical volume. The technique involves receiving an input/output (I/O) operation that specifies a logical address within an address tree associated with the logical volume, parsing the address tree to identify an entry therein, if any, that is associated with the logical address, where the entry stores physical address information that is associated with the logical address. If it is determined that the entry exists, then one or more translated I/O operations are generated based on the physical address information and forwarded to a physical device manager to carry out the translated one or more I/O operations.

Claims20

Dependent claims

A computer-implemented method for carrying out an input/output (I/O) operation issued to a logical volume, comprising:

receiving the I/O operation, wherein the I/O operation specifies a logical address within an address tree associated with the logical volume;
parsing the address tree to identify an entry therein, if any, that is associated with the logical address, wherein the entry stores physical address information that is associated with the logical address;
and
if the entry exists:
generating one or more translated I/O operations based on the physical address information;
and
forwarding the translated one or more I/O operations to a physical device manager to carry out the translated one or more I/O operations.

4 more elements

A non-transitory computer-readable storage medium storing instructions that, when executed by a processor, cause the processor to implement a method for carrying out an input/output (I/O) operation issued to a logical volume, the method comprising:

receiving the I/O operation, wherein the I/O operation specifies a logical address within an address tree associated with the logical volume;
parsing the address tree to identify an entry therein, if any, that is associated with the logical address, wherein the entry stores physical address information that is associated with the logical address;
and
if the entry exists:
generating one or more translated I/O operations based on the physical address information;
and
forwarding the translated one or more I/O operations to a physical device manager to carry out the translated one or more I/O operations.

4 more elements

A system, comprising:

one or more storage devices;
and
a processor, configured to implement a method for carrying out an input/output (I/O) operation issued to a logical volume, the method comprising:
receiving the I/O operation, wherein the I/O operation specifies a logical address within an address tree associated with the logical volume;
parsing the address tree to identify an entry therein, if any, that is associated with the logical address, wherein the entry stores physical address information that is associated with the logical address;
and
if the entry exists:
generating one or more translated I/O operations based on the physical address information;
and
forwarding the translated one or more I/O operations to a physical device manager to carry out the translated one or more I/O operations.

7 more elements

Dependencies are inferred from the claim text.

Logical volume space sharing

Life of this patent

Logical volume space sharing

Life of this patent

Abstract

Claims20