Method, device, and computer program product for managing storage system

A device for managing a storage system, the storage system comprising a first storage device and a second storage device, the device comprising:

• at least one processor;
• and
• a memory coupled to the at least one processor and having instructions stored thereon, the instructions, when executed by the at least one processor, causing the device to perform operations, the operations comprising:
• searching for a data object specified by a write request in the first storage device, the write request specifying the data object that is to be written to the storage system, wherein the write request is received via a backup client installed at a user application system, the storage system being connected to the user application system to store a backup of the data object in the user application system;
• registering the user application system to one of the first storage device and the second storage device to serve the user application system, based on a first workload of the first storage device, a second workload of the second storage device and a backup demand of the user application system;
• according to determining the data object is not present in the first storage device, notifying the second storage device to search for the data object in the second storage device;
• writing the data object to the storage system according to a search result of searching for the data object in the second storage device;
• and
• determining an address mapping of the data object based on an address to which the data object is written in the storage system, wherein the address mapping indicates an address of the data object in the storage system, the address mapping being updated if the data object is present in the second storage device.

A computer program product, tangibly stored on a non-transitory computer readable medium and comprising machine executable instructions, which when executed by a processor, cause the processor to perform operations, the operations comprising:

• searching for a data object specified by a write request in a first storage device, the write request specifying the data object that is to be written to a storage system, the storage system comprising the first storage device and a second storage device, wherein the write request is received via a backup client installed at a user application system, the storage system being connected to the user application system to store a backup of the data object in the user application system;
• registering the user application system to one of the first storage device and the second storage device to serve the user application system, based on a first workload of the first storage device, a second workload of the second storage device and a backup demand of the user application system;
• according to determining the data object is not present in the first storage device, notifying the second storage device to search for the data object in the second storage device;
• writing the data object to the storage system according to a search result of searching for the data object in the second storage device;
• and
• determining an address mapping of the data object based on an address to which the data object is written in the storage system, wherein the address mapping indicates an address of the data object in the storage system, the address mapping being updated if the data object is present in the second storage device.