| 摘要 |
A method of a transaction-based system is applicable to a data deduplication system. In the system, pointers of same data point to a same position, so that when one piece of data is changed, all associated pointers need to be changed. In this method, a server first sets a flag to a false value, and after the server receives a request for backing up a data element from a client, the server reads a fingerprinting of the data element and determines whether the fingerprinting is the same as a temporary fingerprinting in a meta cache of the client, writes the data element and the fingerprinting into a corresponding temporary storage data block when the fingerprinting is not the same as the temporary fingerprinting, and writes the data element and the fingerprinting into a main meta cache and resets the flag when the flag is a true value.
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