STORAGE SYSTEM AND A METHOD USED BY THE STORAGE SYSTEM

摘要

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.

主权项

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.