Method to support hash based xcopy synchronous replication

A system for supporting hash-based, extended copy (xcopy) command-enabled synchronous replication at a storage system including a source site and a target site, the system comprising:

• a memory comprising computer-executable instructions;
• and
• a processor operable by the storage system, the processor executing the computer-executable instructions, the computer-executable instructions when executed by the processor cause the processor to perform operations comprising:
• determining, in response to receiving an xcopy command at the source site, whether the source site and the target site are in active synchronous replication to a same target;
• and
• upon determining that the source site and the target site are in active synchronous replication to the same target:
• sending, by the source site, a global unique full hash digest to the target site;
• searching, by the target site, for local hash handles of the global unique full hash digest;
• and
• upon determining the local hash handles exist in the global unique full hash digest, sending corresponding hash handles from the source site to the target site.

A computer program product for supporting hash-based, extended copy (xcopy) command-enabled synchronous replication at a storage system, the computer program product embodied on a non-transitory computer readable medium, the computer program product including instructions that, when executed by a computer, causes the computer to perform operations comprising:

• determining, in response to receiving an xcopy command at the source site, whether the source site and the target site are in active synchronous replication to a same target;
• and
• upon determining that the source site and the target site are in active synchronous replication to the same target:
• sending, by the source site, a global unique full hash digest to the target site;
• searching, by the target site, for local hash handles of the global unique full hash digest;
• and
• upon determining the local hash handles exist in the global unique full hash digest, sending corresponding hash handles from the source site to the target site.