Data Copy Management Apparatus and Data Copy Method Thereof

摘要

A data copy management apparatus and a data copy method thereof. The data copy method includes obtaining, using a hash algorithm, hash values of multiple source data blocks obtained by dividing source data; sending the hash values to a target storage side, so that the target storage side determines, based on the received hash values, whether the target storage side directly generates the source data blocks or a source storage side sends the source data blocks to the target storage side; ignoring the source data blocks when a first feedback fed back by the target storage side is received; and sending the source data blocks to the target storage side when a second feedback fed back by the target storage side is received. Thus, a speed of copying a special data block can be improved, saving central processing (CPU) and network resources and reducing copy time.

主权项

1. A data copy method, used for copying source data on a source storage side to a target storage side, the method comprising:
dividing the source data on the source storage side into multiple source data blocks; obtaining a hash value of each source data block using a hash algorithm; sending the hash value to the target storage side, so that the target storage side determines, based on the received hash value, whether the target storage side directly generates the source data blocks or the source storage side sends the source data blocks to the target storage side; receiving a feedback from the target storage side; ignoring the source data blocks if the feedback is a first feedback that the target storage side directly generates the source data blocks; and sending the source data blocks to the target storage side if the feedback is a second feedback that the source storage side sends the source data blocks to the target storage side.