Block level data replication

摘要

Systems and methods for replicating data from a production server to a backup server include identifying one or more data blocks of a file that were modified after a first time instant and before a second time instant. The file may be associated with a protected directory of the production server. An representative data block (e.g., including a hash value) for at least one of the identified data blocks may be computed using a cryptography algorithm, e.g., MD5 or SHA-1. The computed cryptographic data block representing the identified data block may then be sent for replication to the backup server. An operation performed between the first time instant and the second time instant on one or more files of the protected directory may be recorded, and sent to the backup server.

主权项

1. A method for data replication from a production server to a backup server, the method comprising:
identifying a data block that was modified after a first time instant and before a second time instant, wherein a file comprises the data block and the file is stored in a production server; computing a representative data block for the identified data block, wherein the representative data block is computed using a cryptography algorithm; determining whether the representative data block is identical to one of a plurality of pre-computed representative data blocks; and after said determining, sending the representative data block to a backup server.