Storage system and method for hybrid mapping
A storage system supports several memory mappings that translate data bits into different physical voltage levels in its non-volatile memory. The storage system receives a selection of one of the memory mappings from a host, which makes the selection based on an application or expected workload of the host. The storage system uses the selected memory mapping for a memory access operation, such as a read operation or a write operation.
1. In a host coupled with a storage system comprising a non-volatile memory, a method comprising:
creating a plurality of memory mappings that translate data bits into different physical voltage levels in the non-volatile memory, wherein the plurality of mappings are created according to host-defined namespaces;
determining an expected workload of an application in the host; and
sending, to the storage system, a selection of one of the plurality of memory mappings based on the expected workload, wherein the plurality of mappings comprises (i) a separable binary mapping (SBM) used for cache workloads and (ii) at least one mapping for a respective at least one other type of workload.
2. The method of claim 1 , wherein the plurality of mappings are created based on a user-defined command.
3. The method of claim 1 , wherein the plurality of mappings are used for a key-value data structure.
4. The method of claim 3 , wherein the plurality of mappings are configured. according to a key-value format.
5. The method of claim 3 , wherein the plurality of mappings are configured according to a key-value size.
6. A storage system comprising:
a non-volatile memory, wherein the storage system supports a plurality of memory mappings that translate data bits into different physical voltage levels in the non-volatile memory, wherein the plurality of mappings are created according to host-defined namespaces and comprises (i) a separable binary mapping (SBM) used for cache workloads and (ii) at least one mapping for a respective at least one other type of workload;
means for receiving, from a host, a selection of one of the plurality of memory mappings, wherein the selection is based on a host application or a workload expected by the host; and
means for using the selected memory mapping for a memory access operation.
7. A storage system comprising:
a non-volatile memory, wherein the storage system supports a plurality of memory mappings that translate data bits into different physical voltage levels in the non-volatile memory; and
a controller coupled with the non-volatile memory and configured to:
receive, from a host, a selection of one of the plurality of memory mappings, wherein:
the selection is based on an application or expected workload of the host;
the plurality of mappings are created according to host-defined namespaces;
the plurality of mappings comprises (i) a separable binary mapping (SBM) used for cache workloads and (ii) at least one mapping for a respective at least one other type of workload; and
use the selected memory mapping for a memory access operation.
8. The storage system of claim 7 , wherein the plurality of mappings are selected based on a user-defined command.
9. The storage system of claim 7 , wherein the plurality of mappings are used for a key-value data structure.
10. The storage system of claim 9 , wherein the plurality of mappings are configured according to a key-value format.
11. The storage system of claim 9 , wherein the plurality of mappings are configured according to a key-value size.
12. The storage system of claim 7 , wherein the plurality of mappings are created by the host.
13. The storage system of claim 7 , wherein the plurality of mappings are created by the storage system.
14. The storage system of claim 7 , wherein the non-volatile memory comprises a three-dimensional memory.