Placement of host data based on data characteristics

A method for classifying data in a data storage device, comprising:

• receiving, by a controller of the data storage device, one or more streams of data associated with one or more logical block addresses;
• determining that there is a stream switch of the one or more streams of data;
• determining whether each of the one or more streams of data that have been determined to have undergone a stream switch have further undergone one or more overwrites;
• calculating, in a data classifier module of the data storage device, a placement factor for each of the one or more streams of data that have been determined to have undergone one or more overwrites;
• classifying each of the one or more streams of data as hot streams of data or warm streams of data based on the placement factor of each of the one or more streams of data;
• and
• routing the hot streams of data to a hot open memory block of a plurality of memory blocks and the warm streams of data to a warm open memory block of the plurality of memory blocks.

A data storage device, comprising:

• one or more memory devices comprising a plurality of memory blocks;
• a controller coupled to the one or more memory devices, wherein the controller is configured to receive one or more streams of data associated with one or more logical block addresses;
• a random access memory coupled to the controller, wherein the random access memory includes a flash transition layer and a log page coupled to the one or more memory devices;
• and
• a data classifier module located in the random access memory, the data classifier module coupled to the controller and the plurality of memory blocks, wherein the data classifier module is configured to store a metadata entry update count and a recency count of each of the one or more logical block addresses, and wherein the metadata update and recency count table is stored in the log page.

A data storage device, comprising:

• one or more memory devices comprising a plurality of memory blocks;
• means for receiving one or more streams of data associated with one or more logical block addresses;
• means for updating a metadata update and recency count table for each of the one or more logical block addresses;
• means for calculating a placement factor for each of the one or more streams of data associated with the one or more logical block addresses based on the metadata update and recency count table;
• means for classifying each of the one or more streams of data associated with the one or more logical block addresses as hot streams of data, warm streams of data, or cold streams of data based on the placement factor;
• and
• means for routing the hot streams of data to a hot open memory block of the plurality of memory blocks, routing the warm streams of data to a warm open memory block of the plurality of memory blocks, and routing the cold streams of data to a cold open memory block of the plurality of memory blocks.

A data storage system, comprising:

• a host device;
• and
• a storage device coupled to the host device, the storage device comprising:
• one or more memory devices comprising a plurality of memory blocks;
• a controller coupled to the one or more memory devices, wherein the controller is configured to receive one or more streams of data from the host device;
• and
• a data classifier module coupled to the controller and the one or more memory devices, wherein the data classifier module is configured to classify each of the one or more streams of data as hot, warm, or cold based on a placement factor of each of the one or more streams of data, and route each of the one or more streams of data to a hot open memory block of the plurality of memory blocks, a warm open memory block of the plurality of memory blocks, or a cold open memory block of plurality of memory blocks based on the classification of each of the one or more streams of data as hot, warm, or cold.