Storage system and memory control method
AssigneeHitachi Vantara, Ltd.
InventorsTakaki MATSUSHITA, Kazuki MATSUGAMI, Akira DEGUCHI, Norio SHIMOZONO, Shinichi HAYASHI
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Abstract
A first node performs copy (virtual copy) of address mapping between a virtual volume and a pool to a first virtual volume to create a third virtual volume in the first node. A second node performs mapping from a first pool volume in the second node to the third virtual volume in the first node, and links an address of the first pool volume, which is mapped to the third virtual volume, to an address of a second virtual volume in the second node.
Claims9
A storage system comprising a plurality of nodes including a first node and a second node, wherein
- each node includes
- a virtual volume,
- a pool including one or more pool volumes, in which data to an address of the virtual volume is logically stored in an address mapped to the address of the virtual volume,
- one or more physical drives that store entity of data which is logically stored in the pool,
- a memory that stores management information about data, which is information including mapping between an address of the virtual volume and an address of the pool, and
- a processor,
- a processor of the first node performs virtual copy, which is a copy of the mapping between the address of the virtual volume and the address of the pool, to a first virtual volume in the first node, to create a third virtual volume in the first node,
- a processor of the second node
- performs mapping from a first pool volume in the second node to the third virtual volume created in the first node, and
- links an address of the first pool volume, which is mapped to the third virtual volume, to an address of a second virtual volume in the second node.
A memory control method, using a storage system comprising a plurality of nodes including a first node and a second node, and each node includes a virtual volume, a pool including one or more pool volumes, one or more physical drives, a memory, and a processor, the memory control method comprising:
- logically storing, in the pool including the one or more pool volumes, an address of the virtual volume in an address mapped to the address of the virtual volume;
- storing, via the one or more physical drives, entity of data which is logically stored in the pool;
- storing, via the memory, management information about data, which is information including mapping between an address of the virtual volume and an address of the pool;
- performing, by the first node, a virtual copy, which is a copy of mapping between an address of the virtual volume and the address of the pool, to a first virtual volume in the first node, to create a third virtual volume in the first node;
- performing, by the second node, mapping from a first pool volume in the second node to the third virtual volume created in the first node;
- and
- linking, by the second node, an address of the first pool volume, which is mapped to the third virtual volume, to an address of a second virtual volume in the second node.
Dependencies are inferred from the claim text.