Cloud storage write cache management system and method

A computer program product residing on a non-transitory computer readable storage medium having a plurality of instructions stored thereon which, when executed across one or more processors, cause at least a portion of the one or more processor to perform operations comprising:

• monitoring health of at least one storage device of a cache in a clustered system;
• maintaining a recovery journal, wherein the recovery journal identifies whether one or more chunks of data stored in the cache have been dumped from the at least one storage device to persistent storage in the clustered system;
• determining a state of the at least one storage device based upon, at least in part, the health of the at least one storage device, wherein the state of the at least one storage device is determined to be a first state if at least one I/O request directed to the at least one storage device fails;
• and
• performing a recovery action on the one or more chunks of data stored in the at least one storage device based upon, at least in part, the state of the at least one storage device, wherein the recovery action includes attempting to dump each of the one or more chunks of data stored in the at least one storage device to the persistent storage if the state of the at least one storage device is the first state, wherein each chunk of data successfully dumped is removed from the recovery journal.

A computing system including one or more processors and one or more memories configured to perform operations comprising:

• monitoring health of at least one storage device of a cache in a clustered system;
• maintaining a recovery journal, wherein the recovery journal identifies whether one or more chunks of data stored in the cache have been dumped from the at least one storage device to persistent storage in the clustered system;
• determining a state of the at least one storage device based upon, at least in part, the health of the at least one storage device, wherein the state of the at least one storage device is determined to be a second state if the at least one storage device is incapable of completing I/O requests;
• and
• performing a recovery action on the one or more chunks of data stored in the at least one storage device based upon, at least in part, the state of the at least one storage device, wherein the recovery action includes:
• invalidating at least a portion of the one or more chunks of data stored in the at least one storage device if the state of the at least one storage device is the second state;
• and
• recovering at least a portion of the one or more chunks of data that remain in the recovery journal.