Specifying media type in write commands
Systems and methods for specifying storage media types in write commands executable by storage devices are disclosed. An example system comprises: a plurality of memory devices and a controller operatively coupled to the memory devices, the controller configured to: receive a write command specifying a data item and an identifier of a data stream comprising the data item; determine, by parsing the identifier of the data stream, a data stream attribute shared by data items comprised by the data stream; identify, based on the data stream attribute, a memory device managed by the controller; and transmit, to the memory device, an instruction specifying the data item.
1. A system, comprising:
a plurality of memory devices;
a processing device operatively coupled to the memory devices, the processing device to:
receive a write command specifying a data item and an identifier of a data stream comprising the data item, wherein a bit string comprising a pre-defined number of bits of the identifier of the data stream specifies a data stream attribute reflecting an anticipated retention time of data items comprised by the data stream, wherein the bit string starts from a pre-defined bit position within the identifier of the data stream;
determine, by parsing the identifier of the data stream, the data stream attribute shared by data items comprised by the data stream;
identify, based on the data stream attribute, a memory device managed by the processing device; and
transmit, to the memory device, an instruction specifying the data item.
2. The system of claim 1 , wherein the data stream attribute specifies a storage media type to be utilized for storing data items comprised by the data stream.
3. The system of claim 2 , wherein the storage media type is represented by one of: negative-and (NAND) flash memory, dynamic random access memory (DRAM), static random access memory (SRAM), or 3D cross point memory.
4. The system of claim 1 , wherein the data stream attribute further specifies a workload type of data items comprised by the data stream.
5. The system of claim 1 , wherein identifying the memory device further comprises:
mapping, using a memory data structure, the data stream attribute to an identifier of the memory device.
6. The system of claim 1 , wherein identifying the memory device further comprises:
applying a configurable rule that specifies a logical expression dependent upon the data stream attribute and identifies a memory device to be utilized responsive to successfully evaluating the logical expression.
7. A method, comprising:
receiving a write command specifying a data item and an identifier of a data stream comprising the data item, wherein a bit string comprising a pre-defined number of bits of the identifier of the data stream specifies a data stream attribute shared by data items comprised by the data stream, wherein the bit string starts from a pre-defined bit position within the identifier of the data stream;
determining, by parsing the identifier of the data stream, the data stream attribute shared by data items comprised by the data stream;
identifying, using a memory data structure mapping data stream attribute values to corresponding memory device identifiers, a memory device corresponding to the data stream attribute; and
transmitting, to the memory device, an instruction specifying the data item.
8. The method of claim 7 , wherein the data stream attribute specifies a storage media type to be utilized for storing the data item, and wherein the storage media type is represented by one of: negative-and (NAND) flash memory, dynamic random access memory (DRAM), static random access memory (SRAM), or 3D cross point memory.
9. A method, comprising:
receiving, by a processor, a plurality of data items to be written to a memory system;
identifying, among the plurality of data items, a first data item and a second data item sharing a data stream attribute, wherein the data stream attribute specifies a workload type of data items comprised by the data stream;
determining, based on the data stream attribute, a storage media type to be utilized for storing the first data item and the second data item; and
transmitting, to a controller of the memory system, one or more write commands specifying data comprised by the first data item and the second data item, wherein each write command comprises a data stream identifier, and wherein the storage media type is encoded by a bit string comprising a pre-defined number of bits of the data stream identifier, wherein the bit string starts from a pre-defined bit position within the identifier of the data stream.
10. The method of claim 9 , wherein the memory system is a solid state drive (SSD).
11. The method of claim 9 , wherein the storage media type is represented by one of: negative-and (NAND) flash memory, dynamic random access memory (DRAM), static random access memory (SRAM), or 3D cross point memory.
12. The method of claim 9 , wherein determining the storage media type further comprises:
estimating a retention time of the first data item and the second data item based on an average frequency of requested overwrite operations.
13. The system of claim 1 , wherein the data stream attribute reflects a media usage pattern of data items comprised by the data stream.
14. The system of claim 1 , wherein identifying the memory device further comprises:
choosing a low latency memory device for the data stream responsive to determining that the data stream attribute specifies a low anticipated retention time.
15. The system of claim 1 , wherein identifying the memory device further comprises:
choosing, for the data stream, a memory device that is not susceptible to wear responsive to determining that the data stream attribute specifies a low anticipated retention time.
16. The system of claim 1 , wherein at least one bit of the bit string specifies a retention time of data items comprised by the data stream.
17. The system of claim 1 , wherein at least one bit of the bit string specifies a workload type of data items comprised by the data stream.