System and device for data recovery for ephemeral storage

1. A method for page cache management, comprising:

identifying a storage device fault associated with a fault-resilient storage device;

determining that a first region associated with the fault-resilient storage device comprises an inaccessible space and that a second region associated with the fault-resilient storage device comprises an accessible space;

identifying a read command at a second storage device for data and determine, based on the read command, first data requested by a read operation from a local memory of the second storage device;

determining, based on the read command, second data requested by the read operation from the second region;

retrieving the second data from the second region; and

scheduling a transmission of the second data from the fault-resilient storage device to the second storage device.

2. The method of claim 1 , wherein the method further comprises:

determining, based on the read command, third data requested by the read operation from the inaccessible space of the fault-resilient storage device; and

returning, based on the determination of the third data, an error from the fault-resilient storage device to the second storage device.

3. The method of claim 1 , further comprising:

identifying a write command at the fault-resilient storage device for the data;

writing at least a portion of the data to a page cache of a host device;

determining that the portion of the data comprises dirty data and writing the dirty data to a persistent memory of the second storage device; and

determining that the portion of the data comprises clean data associated with the inaccessible space and writing the clean data to a persistent memory of the second storage device.

4. The method of claim 1 , wherein the transmission of the second data comprises a live migration of at least one virtual machine from the fault-resilient storage device to the second storage device.

5. The method of claim 1 , wherein the first data comprises at least a portion of the data that is cached at the local memory.

6. The method of claim 1 , wherein the local memory comprises a DRAM and the identification of the first data is from a page cache.

7. The method of claim 1 , wherein the data comprises data associated with at least one virtual machine of a host device.

8. The method of claim 1 , wherein the storage device fault comprises the fault-resilient storage device operating in a partial read-only mode wherein the fault-resilient storage device performs at a reduced performance or at a reduced capacity.

9. The method of claim 1 , wherein at least one of the fault-resilient storage device or the second storage device comprise a solid state drive.

10. A device for page cache management, comprising:

at least one memory device that stores computer-executable instructions; and

at least one processor configured to access the at least one memory device, wherein the at least one processor is configured to execute the computer-executable instructions to:

identify a storage device fault associated with a fault-resilient storage device;

determine that a first region associated with the fault-resilient storage device comprises an inaccessible space and that a second region associated with the fault-resilient storage device comprises an accessible space;

identify a read command at a second storage device for data and determine, based on the read command, first data requested by a read operation from a local memory of the second storage device;

determine, based on the read command, second data requested by the read operation from the second region;

retrieve the second data from the second region; and

schedule a transmission of the second data from the fault-resilient storage device to the second storage device.

11. The device of claim 10 , wherein the at least one processor is further configured to execute the computer-executable instructions to:

determine, based on the read command, third data requested by the read operation from the inaccessible space of the fault-resilient storage device; and

return, based on the determination of the third data, an error from the fault-resilient storage device to the second storage device.

12. The device of claim 10 , wherein the at least one processor is further configured to execute the computer-executable instructions to:

identify a write command at the fault-resilient storage device for the data;

write at least a portion of the data to a page cache of a host device;

determine that the portion of the data comprises dirty data and write the dirty data to a persistent memory of the second storage device; and

determine that the portion of the data comprises clean data associated with the inaccessible space and write the clean data to a persistent memory of the second storage device.

13. The device of claim 10 , wherein the transmission of the data comprises a live migration of at least one virtual machine from the fault-resilient storage device to the second storage device.

14. The device of claim 10 , wherein the first data comprises at least a portion of the data that is cached at the local memory.

15. The device of claim 10 , wherein the local memory comprises a DRAM and the determination of the first data is from a page cache, and wherein the data comprises data associated with at least one virtual machine of a host device.

16. The device of claim 10 , wherein the storage device fault comprises the fault-resilient storage device operating in a partial read-only mode wherein the fault-resilient storage device performs at a reduced performance or at a reduced capacity.

17. A non-transitory computer-readable medium storing computer-executable instructions which, when executed by a processor, cause the processor to perform operations comprising:

identifying a storage device fault associated with a fault-resilient storage device;

determining that a first region associated with the fault-resilient storage device comprises an inaccessible space and that a second region associated with the fault-resilient storage device comprises an accessible space;

identifying a read command at a second storage device for data and determining, based on the read command, first data requested by a read operation from a local memory of the second storage device;

determining, based on the read command, second data requested by the read operation from the second region;

retrieving the second data from the second region; and

scheduling a transmission of the second data from the fault-resilient storage device to the second storage device.

18. The non-transitory computer-readable medium of claim 17 , wherein the non-transitory computer-readable medium further comprises computer-executable instructions comprising:

determining, based on the read command, third data requested by the read operation from the inaccessible space of the fault-resilient storage device; and

returning, based on the determination of the third data, an error from the fault-resilient storage device to the second storage device.

19. The non-transitory computer-readable medium of claim 17 , wherein the non-transitory computer-readable medium further comprises computer-executable instructions comprising:

identifying a write command at the fault-resilient storage device for the data;

writing at least a portion of the data to a page cache of a host device;

determining that the portion of the data comprises dirty data and writing the dirty data to a persistent memory of the second storage device; and

determining that the portion of the data comprises clean data associated with the inaccessible space and writing the clean data to a persistent memory of the second storage device.

20. The non-transitory computer-readable medium of claim 17 , wherein the transmission of data comprises a live migration of at least one virtual machine from the fault-resilient storage device to the second storage device.