DEDUPLICATION OF DATA

摘要

Backing up a data file can be accomplished by processing, in-line and at a first client, a plurality of datablocks taken from the data file. The processing of each datablock includes creating a unique signature of the datablock and determining whether the signature is contained in a database of signatures. Each signature in the database is associated with previously backed up datablocks. The database of signatures includes signatures of previous backed up datablocks that were backed up from at least one other client. Data are transmitted to a remote backup server for backing up the datablock. The transmitted data characterize a link to one of the previously stored datablocks when the signature of the processed datablock is found in the database of signatures. Related apparatus, systems, techniques, and articles are also described.

主权项

1. A computer-implemented method of backing up a data file, the method comprising:
processing, in-line and at a first client, a plurality of datablocks taken from the data file, the processing of each datablock comprising:
creating a unique signature of the datablock;determining whether the created unique signature is contained in a database of signatures, each signature in the database associated with previously backed up datablocks, the database including signatures of previous backed up datablocks that were backed up from at least one other client; andtransmitting data to a remote backup server for backing up the datablock, wherein the transmitted data characterize a link to one of the previously stored datablocks when the created unique signature of the processed datablock is found in the database of signatures and wherein the transmitted data characterize a copy of the processed datablock when the created unique signature of the processed datablock is not contained in the database of signatures.