US 2020/0401513 A1 · GARBAGE COLLECTION ADAPTED TO HOST WRITE ACTIVITY

Abstract

Systems and methods for adapting garbage collection (GC) operations in a memory device to a host write activity are described. A host write progress can be represented by an actual host write count relative to a target host write count. The host write activity may be estimated in a unit time such as per day, or accumulated over a specified time period. A memory controller can adjust an amount of memory space to be freed by a GC operation according to the host write progress. The memory controller can also dynamically reallocate a portion of the memory cells between a single level cell (SLC) cache and a multi-level cell (MLC) storage according to the host write progress.

Claims20

Dependent claims

A memory device, comprising:

a group of memory cells;
and
a memory controller, including:
a workload tracker circuit configured to track a host write progress metric representing an actual host write count relative to a target host write count, the actual host write count representing an actual amount of data requested by a host to write to the memory cells during a specified time period, and the target host write count representing a target amount of data expected to be requested by the host to write to the memory cells during the same specified time period;
and
a garbage collection (GC) controller configured to adjust an amount of memory space to be freed by a GC operation on a portion of the group of the memory cells according to the tracked host write progress metric.

3 more elements

A method of optimizing memory utilization in a memory device via a memory controller, the method comprising:

tracking a host write progress metric representing an actual host write count relative to a target host write count, the actual host write count representing an actual amount of data requested by a host to write to memory cells of the memory device during a specified time period, and the target host write count representing a target amount of data expected to be requested by the host to write to the memory cells during the same specified time period;
and
adjusting an amount of memory space to be freed by a garbage collection (GC) operation on a portion of the memory cells according to the tracked host write progress metric.

Dependencies are inferred from the claim text.

Garbage collection adapted to host write activity

Life of this patent

Garbage collection adapted to host write activity

Life of this patent

Abstract

Claims20