Data synchronization

A computer program product comprising:

• a non-transitory computer readable medium encoded with computer executable program code, wherein the code enables execution across one or more processors of:
• reading a signature corresponding to a portion of data on a virtual machine disk (VMDK) on a production site, wherein reading the signature includes obtaining a first mapping between a first block offset on the virtual machine disk on the production site and a second block offset on a first de-duplicated physical storage on the production site, and reading, based on the first mapping, the signature from the first de-duplicated physical storage on the production site;
• sending the signature to a replication site;
• obtaining a second mapping between a third block offset on a virtual machine disk on the replication site and a fourth block offset on a second de-duplicated physical disk storage on the replication site;
• issuing a command to write the portion of data corresponding to the signature to the second de-duplicated physical storage on the replication site based on the second mapping;
• determining, based at least in part on a result of the command, that a first set of blocks on the first de-duplicated physical storage on the production site and a second set of blocks on the second de-duplicated physical storage on the replication site, the first set of blocks and the second set of blocks corresponding to the signature, require synchronization;
• and
• marking, in a synchronization structure, a first set of one or more locations on the first de-duplicated physical storage on the production site and a second set of one or more locations on the second de-duplicated physical storage on the replication site, the first set of one or more locations corresponding to the first set of blocks and the second set of one or more locations corresponding to the second set of blocks, the first set of blocks and the second set of blocks corresponding to the signature that require synchronization.

A system comprising:

• a production site;
• a replication site;
• and
• computer-executable logic operating in memory, wherein the computer-executable program logic is configured to enable execution across one or more processors of:
• reading a signature corresponding to a portion of data on a virtual machine disk (VMDK) on a production site, wherein reading the signature includes obtaining a first mapping between a first block offset on the virtual machine disk on the production site and a second block offset on a first de-duplicated physical storage on the production site, and reading, based on the first mapping, the signature from the first de-duplicated physical storage on the production site;
• sending the signature to a replication site;
• obtaining a second mapping between a third block offset on a virtual machine disk on the replication site and a fourth block offset on a second de-duplicated physical disk storage on the replication site;
• issuing a command to write the portion of data corresponding to the signature to the second de-duplicated physical storage on the replication site based on the second mapping;
• determining, based at least in part on a result of the command, that a first set of blocks on the first de-duplicated physical storage on the production site and a second set of blocks on the second de-duplicated physical storage on the replication site, the first set of blocks and the second set of blocks corresponding to the signature, require synchronization;
• and
• marking, in a synchronization structure, a first set of one or more locations on the first de-duplicated physical storage on the production site and a second set of one or more locations on the second de-duplicated physical storage on the replication site, the first set of one or more locations corresponding to the first set of blocks and the second set of one or more locations corresponding to the second set of blocks, the first set of blocks and the second set of blocks corresponding to the signature that require synchronization.