STORAGE SYSTEM AND A METHOD USED BY THE STORAGE SYSTEM
First Claim
1. A method for performing failover processing between a production host and a backup host, a storage system is connected to the production host and the backup host, the method comprising:
- in response to a failure of the production host;
obtaining metadata of data blocks that have already been cached from an elastic space located in a fast disk of the storage system;
expanding a storage capacity of the elastic space;
obtaining data blocks to which the metadata corresponds according to the metadata and the storage capacity of the expanded elastic space, and storing the same in the expanded elastic space; and
in response to that the backup host requests the data blocks to which the metadata corresponds and the data blocks to which the metadata corresponds have already been stored in the expanded elastic space, obtaining the data blocks to which the metadata corresponds from the expanded elastic space and transmitting the same to the backup host.
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Accused Products
Abstract
Performing failover processing between a production host and a backup host, a storage system is connected to the production host and the backup host. In response to a failure of the production host, metadata is obtained of data blocks that have been cached from an elastic space located in a fast disk of the storage system. A storage capacity of the elastic space is expanded. Data blocks are obtained to which the metadata corresponds according to the metadata and the storage capacity of the expanded elastic space, and storing the same in the expanded elastic space. In response the backup host requesting the data blocks to which the metadata corresponds, and the data blocks to which the metadata corresponds have already been stored in the expanded elastic space, data blocks are obtained to which the metadata corresponds from the expanded elastic space and transmitting the same to the backup host.
59 Citations
20 Claims
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1. A method for performing failover processing between a production host and a backup host, a storage system is connected to the production host and the backup host, the method comprising:
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in response to a failure of the production host; obtaining metadata of data blocks that have already been cached from an elastic space located in a fast disk of the storage system; expanding a storage capacity of the elastic space; obtaining data blocks to which the metadata corresponds according to the metadata and the storage capacity of the expanded elastic space, and storing the same in the expanded elastic space; and in response to that the backup host requests the data blocks to which the metadata corresponds and the data blocks to which the metadata corresponds have already been stored in the expanded elastic space, obtaining the data blocks to which the metadata corresponds from the expanded elastic space and transmitting the same to the backup host. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A storage system for performing failover processing between a production host and a backup host, the storage system comprising:
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a metadata obtaining device configured to, in response to a failure of the production host, obtain metadata of data blocks that have already been cached from an elastic space located in a fast disk of the storage system; an elastic space expanding device configured to expand a storage capacity of the elastic space; an elastic space data block storing device configured to obtain data blocks to which the metadata corresponds according to the metadata and the storage capacity of the elastic space, and store the same in the expanded elastic space; and a backup host data request responding device configured to in response to that the backup host requests the data blocks to which the metadata corresponds and the data blocks to which the metadata corresponds have already been stored in the expanded elastic space, obtaining the data blocks to which the metadata corresponds from the expanded elastic space and transmitting the same to the backup host. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification