Disk access operation recovery techniques

A non-transitory computer readable medium having stored thereon instructions for causing a processing circuitry to execute a process, the process comprising:

• receiving, at a storage server including a network storage device, an access instruction over a first communication path between a client device and the storage server, wherein the network storage device includes a first memory and a second memory, wherein the first memory stores a first access queue;
• storing the access instruction in the first access queue;
• storing a second access queue in the second memory when the first communication path has failed, wherein the second access queue is at least a portion of the first access queue including the access instruction, wherein the second access queue is a snapshot of the first access queue, wherein the snapshot reflects the state of the first access queue at a point of failure of the first communication path;
• determining, based on the snapshot reflecting the state of the first access queue at the point of failure of the first communication path, a status of the access instruction when a second communication path is established with the client device;
• and
• sending, to the client device, a notification indicating the determined status of the access instruction via the second communication path.

A system for providing remote direct memory access failover, comprising:

• a network storage device including a first memory and a second memory, wherein the first memory stores a first access queue;
• a processing circuitry;
• and
• a memory, the memory containing instructions that, when executed by the processing circuitry, configure the system to:
• receive an access instruction over a first communication path between a client device and the system;
• store the access instruction in the first access queue;
• store a second access queue in the second memory when the first communication path has failed, wherein the second access queue is at least a portion of the first access queue including the access instruction, wherein the second access queue is a snapshot of the first access queue, wherein the snapshot reflects the state of the first access queue at a point of failure of the first communication path;
• determine, based on the snapshot reflecting the state of the first access queue at the point of failure of the first communication path, a status of the access instruction when a second communication path is established with the client device;
• and
• send, to the client device, a notification indicating the determined status of the access instruction via the second communication path.