Adaptive private network asynchronous distributed shared memory services

A non-transitory computer readable medium having stored therein executable instructions that when executed by a processor of a computer control the computer to perform steps comprising:

• calibrating a first clock in a node-A and a second clock in a node-B according to a current time in a node-C sent to the node-A and to the node-B, wherein the calibrated first clock is used to measure arrival and sent times in the node-A and the calibrated second clock is used to measure arrival and sent times in the node-B, wherein the node-A comprises a wide area network (WAN) ingress node and the node-B comprises a WAN egress node;
• transmitting a first memory block at a measured sent time-A from the node-A over a first communication path to the node-B at a measured arrival time-A;
• transmitting a second memory block at a measured sent time-B from the node-A over a second communication path that is different from the first communication path to the node-B at a measured arrival time-B, wherein the first and second communication paths comprise paths across the WAN;
• generating, in the node-B, a node-B path quality report containing an analysis of the measured sent time-A, the measured arrival time-A, the measured sent time-B, and the measured arrival time-B;
• determining, in the node-A, path selections for subsequent transmissions of memory blocks from the node-A across the WAN to the node-B based on the node-B path quality report received from the node-B;
• and
• transmitting the memory blocks across the WAN from the node-A to the node-B using the path selections, wherein transmitting the memory blocks across the WAN comprises performing adaptive private network (APN) shared memory refresh operations from the node-A across the WAN to the node-B, wherein the APN shared memory refresh operations comprise an update of an APN receive memory block located at the node-B with data from an APN transmit memory block at the node-A.