Remote office duplication

摘要

Remote office deduplication comprises calculating one or more fingerprints of one or more data blocks, sending the one or more fingerprints to one or more backup servers via a network interface, receiving from the one or more backup servers an indication of which one or more data blocks corresponding to the one or more fingerprints should be sent to the one or more backup servers, and if the indication indicates one or more data blocks to be sent to the one or more backup servers, sending the one or more data blocks to the one or more backup servers via the network interface.

主权项

1. A method comprising:
storing data blocks at a client system; backing up the data blocks on a backup server by performing at the client system:
maintaining a record of fingerprints for data blocks that the client system previously sent to the backup server via a network interface;using the record of fingerprints to send to the backup server only those data blocks not previously sent to the backup server;upon determining that a first data block in a first dataset was previously sent to the backup server as a second data block in a second dataset, determining a location of the second data block in the second dataset on the backup server and commanding the backup server to map the first data block in the first dataset to the second data block in the second dataset; and restoring the data blocks of the client system by performing at the client system:
upon receiving, from the backup server, a mapping between the first data block in the first dataset and the second data block in the second dataset, copying the second data block in the second dataset to the first data block in the first dataset.