Patent attributes
Disclosed is a storage system that includes a first node and a second node. The first node and the second node are connected to a client and a storage device. The first node includes a first memory for cache data, receives data from the client, stores the data into the first memory, and controls the storing the content of the data into the storage device from the first memory in accordance with an instruction from the second node. The second node includes a second memory for the same cache data as the first memory. If the content of data in the storage device or the content of data in the second memory before the storing of the data is the same as the content of the data in the second memory, the second node instructs the first node not to store the content of the data into the storage device.
