Approach for optimizing restores of deduplicated data

A method for optimizing restores of deduplicated data onto a client computing system in a storage management system, the storage management system comprising a client computing system coupled to a client data store and a server computing system coupled to a deduplicated server data store, with the method comprising:

• receiving data of a file from the client data store for storage to the server data store;
• storing deduplicated chunks of the file within the server data store, wherein the client computing system maintains an index to track locations of file chunks remaining on the client data store after storage to the server data store;
• providing one or more chunks of the file from the server data store during a restore of the file to the client data store, including providing the chunk from the server data store responsive to the client computing system determining the one or more chunks do not exist on the client data store;
• and
• providing an end-to-end digest of the file to the client computing system to enable verification of the restore of the file to the client data store.

A storage management system, comprising:

• a client computing system;
• a server computing system connected to the client computing system via a network;
• a client data store coupled to the client computing system;
• a server data store coupled to the server computing system;
• at least one processor within the storage management system;
• and
• at least one memory store within the storage management system having instructions operable with the at least one processor for optimizing restores of deduplicated data, the instructions being executed for:
• maintaining a chunk index on the client computing system, the chunk index tracking locations of chunks within files remaining on the client data store after storage of the files to the server data store;
• retrieving chunks for a specified file during a restore of the specified file from the server data store to the client data store, including for each chunk of the specified file:
• determining whether a valid entry for the chunk exists in the chunk index;
• retrieving the chunk from the server data store responsive to determining a valid entry for the chunk does not exist in the chunk index;
• and
• retrieving the chunk from a location on the client data store specified in the chunk index responsive to determining a valid entry for the chunk exists in the chunk index;
• and
• reconstructing the specified file from the retrieved copies of the chunks and completing the restore of the specified file to the client data store.

A storage management system, comprising:

• a client computing system;
• a server computing system connected to the client computing system via a network;
• a client data store coupled to the client computing system;
• a server data store coupled to the server computing system;
• at least one processor within the storage management system;
• and
• at least one memory store within the storage management system having instructions operable with the at least one processor for optimizing restores of deduplicated data from the server computing system onto the client computing system, the instructions being executed for:
• receiving data of a file from the client data store for storage to the server data store;
• storing deduplicated chunks of the file within the server data store, wherein the client computing system tracks locations of file chunks remaining on the client data store after storage to the server data store;
• providing one or more chunks of the file from the server data store during a restore of the file to the client data store, including providing the chunk from the server data store responsive to the client computing system determining the one or more chunks do not exist on the client data store;
• and
• providing an end-to-end digest of the file to the client computing system to enable verification of the restore of the file to the client data store.