Samsung Electronics Co., Ltd.

Ju-Pyung Lee

Myung-June Jung

Bon-Cheol Gu

Sang-bum Suh

Hoshik Lee

Jung-Min Seo

Gae-Won You

Sung-min Lee

Hyun-Jung Shin

Chang-Man Lee

Geun-Sik Lim

Jee-Seok Hyun

Hye-Sung Kim

Ho-Shik Lee

A key-value storage device includes a non-volatile memory and a controller. A method of operating the key-value storage device includes: receiving, from a host, information regarding at least one of a random region, comprising random bits, and a non-random region each included in a key; receiving, from the host, a first command including a first key; generating, based on the received information, a mapping index of a mapping table from first bits, the first bits corresponding to at least some of the random bits included in the first key; and controlling an operation for the non-volatile memory, according to the first command, by using the mapping table.

Key-value storage device and method of operating key-value storage device

A redundant array of independent disks (RAID) storage system includes a plurality of storage devices that perform an erase operation according to a plurality of erase unit sizes. A RAID controller controls the plurality of storage devices based on a RAID environment. The RAID controller adjusts the erase unit sizes with respect to at least some of the plurality of storage devices, respectively.

Storage device having variable erase unit size and storage system including the same

A method of operating a storage device including at least one nonvolatile storage and a storage controller configured to control the nonvolatile storage. A first type of request, original data and a first request information associated with the original data are received, in the storage controller, from an external host device, a compression operation to compress the original data to generate compressed data is performed in the storage controller, in response to the first type of request, and a write operation to write the compressed data in a data storage area of the nonvolatile storage is performed in the storage controller. The data storage area of the nonvolatile storage may store the first request information associated with the original data. The external host may manage mapping information in the form of a mapping table associated with compression/decompression at the storage device.

Method of operating a storage device to compress or decompress data and a data storage system including the storage device

A storage controller includes a co-access pattern mining unit configured to detect co-access patterns of data co-accessed during a particular time duration and to generate co-access groups including a plurality of pieces of data complying with the co-access patterns. The storage controller further include a co-access group matching unit configured to select a co-access group matched with read-requested data, among the generated co-access groups, and a data placement unit configured to store the data included in the selected co-access group in a pre-fetch buffer.

Storage controller and method of operating the same

The method of operating a storage system includes executing a storage service providing storage of a volume unit to at least one host device, in which the volume includes a first volume and a second volume. The method includes giving a first priority and a second priority lower than the first priority to the first volume and the second volume, respectively, and recovering meta-data for the first volume having the first priority when the storage service is stopped. The method includes starting the storage service using the recovered meta-data for the first volume, and recovering meta-data for the second volume having the second priority.

Method of operating storage system and storage controller

An operating method of a memory system including a storage array including a plurality of segments and a first server node and a second server node allocating and managing the plurality of segments includes: requesting, via the first server node, load information from the second server node before performing a memory operation; receiving, via the first server node, the load information from the second server node and comparing load information of the first server node with the load information of the second server node; performing, via the first server node, a load balancing operation, based on a comparison result; and performing, via the first server node, a segment dynamic allocation operation regarding the storage array, the segment dynamic allocation operation matching the load balancing operation.

Memory system including plurality of server nodes sharing storage array and operating method of memory system

A data mirroring control apparatus includes a command distributing unit configured to transmit a first write command to a plurality of mirroring storage devices, the first write command including an instruction for data requested by a host to be written; and a memory lock setting unit configured to set a memory lock on the data requested by the host to be written among data stored in a host memory and configured to release the memory lock on the data after the data with the memory lock is written to the plurality of mirroring storage devices.

Data mirroring control apparatus and method

Data deduplication is performed by separating data into a plurality of data chunks that correspond to first through Npositions and include symbols, calculating discrimination indices of the positions using frequencies of the symbols in the different positions; arranging the order of the positions based on values of the discrimination indices; and generating fingerprints of the data through combination of data chunks that correspond to a number of the positions, based on the arranged order of the positions.

Data deduplication method

A deduplication method using data association information includes extracting information about a target file and at least one reference file associated with the target file as association information before duplication determination is performed. The at least one reference file is identified by the association information as a comparison target set for comparison when the duplication determination of the target file is performed. The duplication determination is performed with the target file with respect to the at least one reference file in the selected comparison target set.

Deduplication method and deduplication system using data association information

Processing an adaptive interrupt includes selectively setting an input/output (I/O) device in a computing system to an adaptive masking mode when at least one factor value of the at least one I/O device regarding a workload of the computing system exceeds a first threshold condition. Processing the adaptive interrupt further includes performing an interrupt masking process, where an interrupts generated by an I/O device set to the adaptive masking mode are prevented from being output when a time interval between I/O submission events of the I/O device is less than a first threshold value. The adaptive interrupt may be processed by an adaptive interrupt processing module (AIPM). The AIPM may be included in various portions of the computing system, including the I/O device and a host connected to the I/O device.

Method and apparatus for processing adaptive interrupt, host employing the same, I/O device and system

The data storage device includes a separator configured to separate data requested to write by clients into data chunks, an address translator configured to translate first addresses generated by the data chunks into second addresses as global addresses, a storage node mapper configured to map the second addresses to a plurality of storage nodes, and a data store unit configured to select a target storage node among the plurality of storage nodes and store the data chunks in the target storage node. The data chunks include a plurality of data input/output unit blocks. If other data chunks that are the same with the data chunks are pre-stored in the plurality of storage nodes, the data store unit is configured to establish links between the same pre-stored data chunks and the second addresses, rather than stores the data chunks in the plurality of storage nodes.

Device and method for storing data in distributed storage system

A cache management apparatus includes an access pattern analysis unit configured to analyze an access pattern of each of one or more pages present in a first cache by monitoring data input/output (I/O) requests, a page class management unit configured to determine a class of each of the pages based on results of the analysis performed by the access pattern analysis unit, and a page transfer management unit configured to transfer one or more pages classified into a first class including pages to be transferred, to a second cache based on results of the determination performed by the page class management unit.

Cache management apparatus of hybrid cache-based memory system and the hybrid cache-based memory system

A storage controller that improves performance of a storage device by reducing the number of data I/O operations. The storage controller, as part of a storage device and a storage system, and in a method of operating the storage controller, includes a host interface receiving data requested for storage from a host and lifetime information indicating a change period of the data, and a data placement manager determining a storage position of the data in a flash memory based on the lifetime information of the data.

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Suwon-si, South Korea

Ju-Pyung Lee