Atomic remote memory operations in cache mirroring storage systems

A method comprising:

• maintaining a first set of data on a local memory device and a second set of data on a remote memory device, the second set of data a mirror copy of the first set of data, the remote memory device having coupled thereto a remote processing device;
• updating the first set of data, such that the first set of data is no longer a mirror copy of the second set of data;
• and
• transmitting a memory operation burst containing a set of instructions to perform a plurality of memory update operations to the remote processing device such that the remote processing device performs the plurality of memory update operations atomically wherein the remote memory device can not be accessed while performing the plurality of memory update operations thereby updating the second set of data such that the second set of data becomes a mirror copy of the first set of data.

A machine-readable medium having one or more executable instructions stored thereon, which when executed by a digital processing system, cause the digital processing system to perform a method, the method comprising:

• maintaining a first set of data on a local memory device and a second set of data on a remote memory device, the second set of data a mirror copy of the first set of data, the remote memory device having coupled thereto a remote processing device;
• updating the first set of data, such that the first set of data is no longer a mirror copy of the second set of data;
• and
• transmitting a memory operation burst containing a set of instructions to perform a plurality of memory update operations to the remote processing device such that the remote processing device performs the plurality of memory update operations atomically wherein the remote memory device can not be accessed while performing the plurality of memory update operations thereby updating the second set of data such that the second set of data becomes a mirror copy of the first set of data.

A method comprising:

• performing a plurality of data update operations to update a corresponding plurality of data words of a local copy of data stored on a local cache memory, each data word having a corresponding memory address;
• transmitting the plurality of updated data words and the corresponding memory addresses as a plurality of packets to a remote processing device coupled to a remote cache memory;
• storing each packet at the remote processing device until the plurality of packets is received;
• and
• atomically updating a remote copy of data stored on the remote cache memory using the updated data words and the corresponding memory addresses such that access to the remote copy of data is prevented during updating.

A machine-readable medium having one or more executable instructions stored thereon, which when executed by a digital processing system, cause the digital processing system to perform a method, the method comprising:

• performing a plurality of data update operations to update a corresponding plurality of data words of a local copy of data stored on a local cache memory, each data word having a corresponding memory address;
• transmitting the plurality of updated data words and the corresponding memory addresses as a plurality of packets to a remote processing device coupled to a remote cache memory;
• storing each packet at the remote processing device until the plurality of packets is received;
• and
• atomically updating a remote copy of data stored on the remote cache memory using the updated data words and the corresponding memory addresses such that access to the remote copy of data is prevented during updating.

A method comprising:

• transmitting a plurality of memory addresses as a plurality of packets to a remote processing device coupled to a remote cache memory;
• storing each packet at the remote processing device until the plurality of packets is received;
• atomically reading data from the plurality of addresses on a remote copy of data stored on the remote cache memory such that access to the remote copy of data is prevented during the reading;
• and
• transmitting data words read from the plurality of addresses on the remote copy of data to a local processing device.

A machine-readable medium having one or more executable instructions stored thereon, which when executed by a digital processing system, cause the digital processing system to perform a method, the method comprising:

• transmitting a plurality of memory addresses as a plurality of packets to a remote processing device coupled to a remote cache memory;
• storing each packet at the remote processing device until the plurality of packets is received;
• atomically reading data from the plurality of addresses on a remote copy of data stored on the remote cache memory such that access to the remote copy of data is prevented during the reading;
• and
• transmitting data words read from the plurality of addresses on the remote copy of data to a local processing device.