Log-based storage for different data types in non-volatile memory
Apparatuses, systems, and methods are disclosed for log-based storage for different data types in non-volatile memory. An apparatus may include a non-volatile memory element and a controller. A non-volatile memory element may include a first portion of memory, an intermediate storage, and a second portion of memory. A controller may be configured to receive a plurality of data units. A controller may be configured to classify units of data using a first data type and a second data type. A controller may be configured to store a first unit of data having a first data type in a first portion of memory and a second unit of data having a second data type in intermediate storage. Further, a controller may relocate a second unit of data to a second portion of memory.
1. An apparatus comprising:
a non-volatile memory element comprising a first portion of memory, an intermediate storage, and a second portion of memory; and
a controller configured to:
receive a plurality of units of data;
classify the units of data using at least a first data type and second data type;
store a first unit of data having the first data type in the first portion of memory and a second unit of data having the second data type in the intermediate storage, wherein the controller relocates the second unit of data to the second portion of memory;
perform a first garbage collection operation for the first portion of memory, wherein the first garbage collection operation comprises receiving a discard command and erasing a data block without relocating data; and
perform a second garbage collection operation for the second portion of memory, wherein the second garbage collection operation comprises relocating data within the second portion of memory.
2. The apparatus of claim 1 , wherein the first portion of memory comprises single-level cells configured to store one bit per non-volatile memory cell and the second portion comprises multi-level cells configured to store multiple bits per non-volatile memory cell.
3. The apparatus of claim 1 , wherein the first data type and the second data type indicate an update frequency for the units of data.
4. The apparatus of claim 1 , wherein the discard command is received from a log structured file system.
5. The apparatus of claim 1 , wherein the controller is further configured to assign subdivisions of memory from a common memory pool to the first portion of memory and to the intermediate storage.
6. The apparatus of claim 5 , wherein garbage collection for the first portion of memory and the intermediate storage releases the subdivisions of memory into the common memory pool.
7. A method comprising:
classifying data by log type at a file system level;
storing the data in one of a first portion of memory and a second portion of memory based on the classification, wherein the first portion of memory comprises single-level cells configured to store one bit per non-volatile memory cell and the second portion of memory comprises multi-level cells configured to store multiple bits per non-volatile memory cell; and
performing a first garbage collection operation in the first portion of memory in response to a request from a file system and a second garbage collection operation in the second portion of memory based on entries for the second portion of memory in a flash translation layer, wherein performing the first garbage collection operation comprises receiving a discard command and erasing a data block without relocating data.
8. The method of claim 7 , wherein classifying by log type comprises classifying the data based on an update frequency for the data.
9. The method of claim 7 , further comprising assigning subdivisions of memory from a common memory pool to the first portion of memory and to an intermediate storage, wherein the data stored in the second portion of memory is relocated from the intermediate storage into the second portion of memory.
10. The method of claim 9 , wherein performing the first garbage collection operation in the first portion of memory releases the subdivisions of memory into the common memory pool.
11. An apparatus comprising:
means for storing data in separate storage spaces based on a log type;
means for reclaiming a first portion of memory in a first storage space associated with a first type for the log type, wherein the means for reclaiming the first portion of memory receives a discard command and erases a data block without relocating data; and
means for reclaiming a second portion of memory in a second storage space associated with a second type for the log type,
wherein the first portion of memory comprises single-level cells configured to store one bit per non-volatile memory cell and the second portion of memory comprises multi-level cells configured to store multiple bits per non-volatile memory cell.
12. The apparatus of claim 11 , further comprising means for providing memory subdivisions from a common pool to the first portion of memory and to an intermediate storage.
13. The apparatus of claim 11 , wherein the means for reclaiming the second portion of memory operates within a flash translation layer.