Failover method, apparatus and system

A system, comprising:

• a first device;
• and
• a second device in communication with the first device, the second device being configured to:
• receive a transaction processing location identifier associated with a transaction, the transaction being processed by a first device to access a peripheral component interconnect express (PCIe) device, and the transaction processing location identifier being used to resume the transaction when the transaction is interrupted by a failure of the first device;
• determine, according to the transaction processing location identifier, a location at which the transaction is interrupted;
• and
• continue to process the interrupted transaction from the location at which the transaction is interrupted.

An apparatus, comprising:

• a processor;
• and
• a transceiver configured to receive a transaction processing location identifier associated with a transaction, the transaction being processed by a first device to access a peripheral component interconnect express (PCIe) device, and the transaction processing location identifier being used to resume the transaction when the transaction is interrupted by a failure of the first device, and
• wherein the processor is configured to:
• determine, according to the transaction processing location identifier, a location at which the transaction is interrupted;
• and
• continue to process the interrupted transaction from the location at which the transaction is interrupted.