Systems and methods for adaptive data storage
A storage module is configured to store data segments, such as error-correcting code (ECC) codewords, within an array comprising two or more solid-state storage elements. The data segments may be arranged in a horizontal arrangement, a vertical arrangement, a hybrid channel arrangement, and/or vertical stripe arrangement within the array. The data arrangement may determine input/output performance characteristics. An optimal adaptive data storage configuration may be based on read and/or write patterns of storage clients, read time, stream time, and so on. Data of failed storage elements may be reconstructed by use of parity data and/or other ECC codewords stored within the array.
1. A method, comprising:
managing, via a storage module, storage operations for a solid-state storage array;
queuing storage requests for the solid-state storage array in an ordered request buffer;
reordering the storage requests in the ordered request buffer, wherein the storage module comprises:
a logical-to-physical translation layer; and
the ordered request buffer, wherein the ordered request buffer is configured to receive storage requests from one or more store clients, and to buffer storage requests received via a bus;
generating, via an error-correcting code write module, an error-correcting code codeword comprising data for storage on the solid-state storage array, wherein the error-correcting code codeword is used to detect errors in data read from the solid-state storage array, correct errors in data read from the solid-state storage array, or a combination thereof;
generating, via a write module, data rows for storage within columns of the solid-state storage array, wherein each of the data rows comprises data of two or more different error-correcting code codewords;
generating, via a parity module, respective parity data for each of the data rows; and
reconstructing, via a data reconstruction module, an uncorrectable error-correcting code codeword of the two or more different error-correcting code codewords by accessing data rows and the respective parity data comprising the two or more different error-correcting code codewords.
2. The method of claim 1 , further comprising:
detecting the uncorrectable error-correcting code codeword in response to a first read operation;
recovering the uncorrectable error-correcting code codeword by reading other error-correcting code codewords within a vertical stripe with the uncorrectable error-correcting code codewords in a second read operation;
decoding the other error-correcting code codewords; and
reconstructing the uncorrectable error-correcting code codewords using the decoded error-correcting code codewords and parity data of the vertical stripe.
3. The method of claim 1 , further comprising performing, via a grooming module, grooming operations.
4. The method of claim 3 , wherein the grooming operations comprise reclaiming storage resources, erasure, wear leveling, refreshing data stored on the solid-state storage array, or some combination thereof.
5. The method of claim 1 , wherein the solid-state storage array comprises flash memory.
6. The method of claim 1 , wherein the solid-state storage array comprises a plurality of physical storage cells configured for persistent data storage.
7. The method of claim 6 , wherein the plurality of physical storage cells is arranged in groups.
8. The method of claim 7 , wherein each group of the groups comprises a page.
9. The method of claim 7 , wherein the groups are partitioned into storage divisions.
10. The method of claim 9 , wherein each storage division of the storage divisions comprises an erase block.
11. The method of claim 1 , wherein the bus comprises a peripheral component interconnect express bus.
12. The method of claim 1 , wherein the logical-to-physical translation layer comprises any-to-any mappings.
13. The method of claim 1 , wherein the storage module is configured to actively scan the solid-state storage array to identify sections of the solid-state storage array to be taken out of service.
14. The method of claim 1 , wherein the data reconstruction module is configured to reconstruct the uncorrectable error-correcting code codeword based on a horizontal stripe configuration, a vertical stripe configuration, the parity, or some combination thereof.
15. The method of claim 1 , further comprising combining, via an adaptive schedule module, two or more read operations into a combined read operation, wherein the two or more read operations correspond to error-correcting code codewords stored within different sets of storage elements of the solid-state storage array.
16. An apparatus, comprising:
a bus;
a storage module configured to:
manage storage operations for a solid-state storage array;
queue storage requests for the solid-state storage array in an ordered request buffer; and
reorder the storage requests in the ordered request buffer, wherein the storage module comprises:
a logical-to-physical translation layer; and
the ordered request buffer, wherein the ordered request buffer is configured to receive storage requests from one or more store clients, and to buffer storage requests received via the bus;
an error-correcting code write module configured to generate an error-correcting code codeword comprising data for storage on the solid-state storage array, wherein the error-correcting code codeword is used to detect errors in data read from the solid-state storage array, correct errors in data read from the solid-state storage array, or a combination thereof;
a write module configured to generate data rows for storage within columns of the solid-state storage array, wherein each of the data rows comprises data of two or more different error-correcting code codewords;
a parity module configured to generate respective parity data for each of the data rows; and
a data reconstruction module configured to reconstruct an uncorrectable error-correcting code codeword of the two or more different error-correcting code codewords by accessing data rows and the respective parity data comprising the two or more different error-correcting code codewords.
17. The apparatus of claim 16 , further comprising:
an error-correcting code read module configured to detect the uncorrectable error-correcting code codeword in response to a first read operation; and
a data recovery module configured to:
recover the uncorrectable error-correcting code codeword by reading other error-correcting code codewords within a vertical stripe with the uncorrectable error-correcting code codewords in a second read operation;
decode the other error-correcting code codewords; and
reconstruct the uncorrectable error-correcting code codewords using the decoded error-correcting code codewords and parity data of the vertical stripe.
18. The apparatus of claim 16 , further comprising a groomer module configured to perform grooming operations.
19. The apparatus of claim 18 , wherein the grooming operations comprise reclaiming storage resources, erasure, wear leveling, refreshing data stored on the solid-state storage array, or some combination thereof.
20. The apparatus of claim 16 , wherein the solid-state storage array comprises flash memory.
21. The apparatus of claim 16 , wherein the solid-state storage array comprises a plurality of physical storage cells configured for persistent data storage.
22. The apparatus of claim 21 , wherein the plurality of physical storage cells is arranged in groups.
23. The apparatus of claim 22 , wherein each group of the groups comprises a page.
24. The apparatus of claim 22 , wherein the groups are partitioned into storage divisions.
25. The apparatus of claim 24 , wherein each storage division of the storage divisions comprises an erase block.
26. The apparatus of claim 16 , wherein the bus comprises a peripheral component interconnect express bus.
27. The apparatus of claim 16 , wherein the logical-to-physical translation layer comprises any-to-any mappings.
28. The apparatus of claim 16 , wherein the storage module is configured to actively scan the solid-state storage array to identify sections of the solid-state storage array to be taken out of service.
29. The apparatus of claim 16 , wherein the data reconstruction module is configured to reconstruct the uncorrectable error-correcting code codeword based on a horizontal stripe configuration, a vertical stripe configuration, the parity, or some combination thereof.
30. The apparatus of claim 16 , further comprising an adaptive schedule module configured to combine two or more read operations into a combined read operation, wherein the two or more read operations correspond to error-correcting code codewords stored within different sets of storage elements of the solid-state storage array.