Efficient data replication

A computerized method of replicating an object from a source local deduplication store to a remote server based on data already stored on the remote server to reduce the amount of duplicate data sent from the local deduplication store to the remote server, the method comprising:

• receiving, by the remote server, a set of hashes for a source object to be replicated from the source local deduplication store to the remote server;
• generating, by the remote server, data including:
• a set of object hashes representative of data in the source object that is already present on the remote server, and
• data indicative of source object hashes that are not present on the remote server;
• and
• sending, by the remoter server, the generated data to the source local deduplication store so that the source local deduplication store can identify data from the source object that is already present on the remote server so that only remaining data of the source object not already present on the remote server is copied to the remote server to replicate the source object.

A computerized method of replicating an object from a source local deduplication store to a remote server based on data already stored on the remote server to reduce the amount of duplicate data sent from the local deduplication store to the remote server, the method comprising:

• sending, by the source local deduplication store to the remote server, a set of hashes for a source object to be replicated from the source local deduplication store to the remote server;
• generating, by the remote server, data including:
• a set of object hashes representative of data in the source object that is already present on the remote server, and
• data indicative of source object hashes that are not present on the remote server;
• transmitting, by the remote server, the generated data to the source local deduplication store;
• identifying, by the source local deduplication store, portions of the source object that are not already present on the remote server based on the received data;
• transmitting, by the source local deduplication store, the identified portions of the source object to the remote server to replicate the source object on the remote server so that only the portions of the source object not already present on the remote server are copied to the remote server to replicate the source object;
• and
• assembling, by the remote server, a remote object, the remote object comprising the set of object hashes representative of data in the source object that is already present on the remote server and the identified portions, wherein the remote object is identical to the source object.