Obviation of recovery of data store consistency for application I/O errors

An apparatus, comprising:

• input/output (I/O) hardware coupled to a storage device, wherein the I/O hardware enables performance of I/O operations for an application;
• an application module to execute the application and generate a state of a set of processes for the application, wherein the application module is configured to perform an I/O operation for the application, wherein the I/O operation is via a first path to data of the storage device;
• an error module to intercept an error of the I/O operation and prevent the error from causing the application module to execute code in response to receiving the error, wherein the application module is configured to complete the I/O operation via a second path to data of the storage device in response to the error module intercepting the error;
• a checkpoint module to create a checkpoint image of the state in response to completion of the I/O operation via the second path, wherein the checkpoint module is configured to transfer the checkpoint image to a second apparatus, wherein the checkpoint module is configured to create the checkpoint image in a manner which enables the second apparatus to resume execution of the application by starting execution at a point in the application subsequent to the completion of the I/O operation;
• a memory module to store instructions of the application module and a processor to execute the instructions;
• a first communication device which couples the apparatus to the storage device and enables the transfer of the data for the I/O operation;
• and
• a network link that couples the apparatus to the second apparatus via transport control protocol/Internet protocol (TCP/IP) to enable the transfer of the checkpoint image, wherein the data storage device comprises a component of a storage area network (SAN), wherein the I/O hardware comprises a first physical host bus adapter (HBA) which couples the SAN to the apparatus, wherein the SAN is coupled to the second apparatus via a second physical HBA.

A server for processing an error of an input/output (I/O) operation for an application, the server comprising:

• one or more processors, one or more computer-readable memories and one or more computer-readable, tangible storage devices;
• program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to intercept the error, wherein the I/O operation is via a first path from a first computing device to a shared storage system of data;
• program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to complete the I/O operation via a second path to the shared storage system of data after the error is intercepted;
• program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to create, after the error is intercepted, a checkpoint image of a set of processes that the application comprises, wherein the program instructions to intercept the error comprise program instructions to prevent a first computing device from executing code of the application in response to the error, wherein the checkpoint image enables resuming execution of the code of the application subsequent to completion of the I/O operation via the second path;
• and
• program instructions, stored on at least one of the one or more storage device for execution by at least one of the one or more processors via at least one of the one or more memories, to transfer, after completion of the I/O operation via the second path, the created checkpoint image to a second computing device to enable the second computing device to resume execution of the code of the application via the checkpoint image.

A computer program product for handling an error of an input/output (I/O) operation for an application, computer program product comprising:

• one or more computer-readable, tangible storage devices;
• program instructions, stored on at least one of the one or more storage devices, to intercept the error, wherein the I/O operation is via a first path from a first computing device to a shared storage system of data;
• program instructions, stored on at least one of the one or more storage devices, to complete the I/O operation via a second path to the shared storage system of data after the error is intercepted;
• program instructions, stored on at least one of the one or more storage devices, to create, after the error is intercepted, a checkpoint image of a set of processes that the application comprises, wherein the program instructions to intercept the error comprise program instructions to prevent a first computing device from executing code of the application in response to the error, wherein the checkpoint image enables resuming execution of the code of the application subsequent to completion of the I/O operation via the second path;
• and
• program instructions, stored on at least one of the one or more storage devices, to transfer, after completion of the I/O operation via the second path, the created checkpoint image to a second computing device to enable the second computing device to resume execution of the code of the application via the checkpoint image.