Samsung Electronics Co., Ltd.

Byeonghui Kim

Jungmin Seo

Kibeen Jung

Seungjun Yang

Hyeongyu Min

Jooyoung Hwang

Kangho Roh

Hyunkyo Oh

Sungmin Jang

Jaewoong Kim

Han Kyoo Lee

A throttling method for a storage device is provided. The throttling method includes: receiving a write command from a host; identifying, using a first machine learning model, a throttling delay time; transmitting a completion message to the host according to the throttling delay time; collecting weights of the first machine learning model and performance information of the storage device corresponding to the weights; learning the weights and the performance information to generate an objective function indicating a relationship between the weights and the performance information using a second machine learning model of a weight learning device; selecting a weight corresponding to a maximum performance using the objective function; and updating the first machine learning model with the weight.

Storage device, storage system and throttling method thereof

An operation method of a storage device includes receiving a first write request; adding the first write request to a first fragment; selecting at least 'n' (e.g., at least two) streams among a plurality of pre-allocated streams when a size of the first fragment, when a size of the first fragment is >=a reference value, based on a cosine similarity between the first fragment and each of the pre-allocated streams; applying input information to a machine learning model to detect a first sequential stream associated with the first fragment from among the at least “n” streams; allocating a stream identifier of the first sequential stream to the first fragment; and storing write data included in the first fragment based on the stream identifier of the first sequential stream. The input information includes statistical information of at least one of the “n” streams and the first fragment.

Storage controller, storage device, and operation method of storage device

A storage device is configured to manage a plurality of nonvolatile memories with a plurality of physical streams. An operation method of the storage device includes receiving an input/output request from an external host device, determining a 0-th virtual stream identifier, extracting a 0-th representative value from a 0-th virtual stream feature, extracting a first and second representative values corresponding to first and second physical streams, calculating distance information including first and second similarities between the 0-th virtual stream and each of the first and second physical streams, based on the extracted representative values, assigning one of the plurality of physical streams to the 0-th virtual stream, based on the distance information, and performing an operation corresponding to the input/output request, at the assigned physical stream, and the extracting and the calculating are performed by using machine learning model.

Storage device configured to support multi-streams and operation method thereof

A storage device includes a memory device storing model information of a machine learning model; and a storage controller that controls an operation of the storage device using the machine learning model. The storage controller, upon receiving a get command for extracting the model information from the host device, reads the model information from the memory device in response to the get command and transmits the model information to the host device.

Storage device for storing model information, storage system including the storage device, and operating method of the storage system

A method includes sampling input/output requests from a host to generate sampled input/output requests; classifying the sampled input/output requests into clusters using an unsupervised learning algorithm; determining a hot data range based on a characteristic of the clusters; and incorporating the determined hot data range into a hot data table.

Storage device using unsupervised learning scheme and memory management method thereof

The present disclosure provides an operating method of a storage controller. The operating method includes receiving user data and environmental information, obtaining logical-characteristic information and physical-characteristic information, defining a current state, obtaining expectation values, and performing a write operation. User data and environmental information is received from a non-volatile memory. The current state may be defined based on the logical-characteristic information and the physical-characteristic information. Expectation values may be obtained based on policy information and the current state. The write operation may be performed on the user data through a physical stream corresponding to a maximum value among the expectation values.

Growing community of inventors

Hwaseong-si, South Korea

Byeonghui Kim