公开(公告)号：US20240086213A1

公开(公告)日：2024-03-14

申请号：US18484962

申请日：2023-10-11

Applicant: Lemon Inc. ,  Beijing Volcano Engine Technology Co., Ltd.

Inventor： Hui Zhang ,  Fei Liu ,  Ping Zhou ,  Chul Lee ,  Bo Li ,  Shan Xiao

IPC: G06F9/455 ,  G06F9/50

CPC classification number: G06F9/455 ,  G06F9/5027 ,  G06F2209/509

Abstract: Methods and systems for emulating a hardware accelerator is provided. When executed by a computer, the platform includes a plurality of computational resources provided by the computer; a hardware emulator operated on a first computational resource of the plurality of computational resources; and an accelerator being emulated in the platform and operated on a second computational resource of the plurality of computational resources, the accelerator being configured to execute an offloading operation.

公开(公告)号：US12235763B2

公开(公告)日：2025-02-25

申请号：US18741900

申请日：2024-06-13

Applicant: Xi'an Jiaotong University ,  Douyin Vision Co., Ltd. ,  Lemon Inc.

Inventor： Wei Tang ,  Chi Zhang ,  Fangxing Yu ,  Menghan Li ,  Bo Wang ,  Weiguo Wu ,  Fei Liu

IPC: G06F12/08 ,  G06F12/0802

Abstract: The present disclosure provides a data processing method, a device, a computer apparatus and a storage medium, wherein the method includes: in response to a target disk receiving at least one write request within a preset time period, determining a size threshold value for classifying a data update type according to a size of write data respectively indicated by each write request; determining a data update type corresponding to each write request according to a size of each write request and the size threshold value; dividing write data of the write request to obtain a data block according to a preset data block size, and caching the data block in a cache region of the target disk corresponding to the data update type, the target disk has multiple types of cache regions configured therein, different cache regions are configured to support caching of data with different update frequencies.

公开(公告)号：US12204750B2

公开(公告)日：2025-01-21

申请号：US17953242

申请日：2022-09-26

Applicant: Lemon Inc.

Inventor： Ping Zhou ,  Chaohong Hu ,  Kan Frankie Fan ,  Fei Liu ,  Longxiao Li ,  Hui Zhang

IPC: G06F3/06

Abstract: The present disclosure describes techniques of metadata management for transparent block level compression. A first area may be created in a backend solid state drive. The first area may comprise a plurality of entries. The plurality of entries may be indexed by addresses of a plurality of blocks of uncompressed data. Each of the plurality of entries comprises a first part configured to store metadata and a second part configured to store compressed data. Each of the plurality blocks of uncompressed data may be compressed individually to generate a plurality of compressed blocks. Metadata and at least a portion of compressed data associated with each of the plurality of compressed blocks may be stored in one of the plurality of entries based on an address of a corresponding block of uncompressed data. A second area may be created in the backend solid state drive for storing the rest of the compressed data.

公开(公告)号：US12189531B1

公开(公告)日：2025-01-07

申请号：US18741900

申请日：2024-06-13

Applicant: Xi'an Jiaotong University ,  Douyin Vision Co., Ltd. ,  Lemon Inc.

Inventor： Wei Tang ,  Chi Zhang ,  Fangxing Yu ,  Menghan Li ,  Bo Wang ,  Weiguo Wu ,  Fei Liu

IPC: G06F12/08 ,  G06F12/0802

Abstract: The present disclosure provides a data processing method, a device, a computer apparatus and a storage medium, wherein the method includes: in response to a target disk receiving at least one write request within a preset time period, determining a size threshold value for classifying a data update type according to a size of write data respectively indicated by each write request; determining a data update type corresponding to each write request according to a size of each write request and the size threshold value; dividing write data of the write request to obtain a data block according to a preset data block size, and caching the data block in a cache region of the target disk corresponding to the data update type, the target disk has multiple types of cache regions configured therein, different cache regions are configured to support caching of data with different update frequencies.

公开(公告)号：US20240248625A1

公开(公告)日：2024-07-25

申请号：US18099750

申请日：2023-01-20

Applicant: Lemon Inc.

Inventor： Ping Zhou ,  Chaohong HU ,  Kan Frankie Fan ,  Fei Liu ,  Longxiao Li ,  Hui Zhang

IPC: G06F3/06

CPC classification number: G06F3/0641 ,  G06F3/0608 ,  G06F3/067

Abstract: Systems and methods for accessing block storage devices are provided. In particular, a computing device may receive a write request including an uncompressed data and an uncompressed block address associated with the uncompressed data, generate compressed data by compressing the uncompressed data, determine a plurality of mapping candidates of compressed data blocks in the block storage devices based on the uncompressed block address, select a compressed data block from the plurality of mapping candidates that has sufficient capacity to store the compressed data, write the compressed data to the selected compressed data block, update metadata of the selected compressed data block to link the uncompressed block address to a compressed block address of the selected compressed data block, and write the selected compressed data block back to a respective block storage device of the block storage devices.

公开(公告)号：US20240168630A1

公开(公告)日：2024-05-23

申请号：US18056842

申请日：2022-11-18

Applicant: Lemon Inc.

Inventor： Ping Zhou ,  Longxiao Li ,  Chaohong HU ,  Fei Liu ,  Kan Frankie Fan ,  Hui Zhang

IPC: G06F3/06

CPC classification number: G06F3/0608 ,  G06F3/0631 ,  G06F3/064 ,  G06F3/0673

Abstract: A flat hash table includes a plurality of entries, and each entry includes a hash function index and a usage bitmap. A method for block device level compression mapping using the flat hash table includes compressing uncompressed data to compressed data, retrieving an entry of the flat hash table using an uncompressed block address of the uncompressed data, determining a compressed block address of the compressed data by executing at least one hash function and by determining a hash function in the at least one hash function for mapping the uncompressed block address to the compressed block address that corresponds to a space in a block storage device, storing the compressed data to the space that corresponds to the compressed block address, and updating the hash function index of the entry of the flat hash table with an index indicative of the hash function.

公开(公告)号：US20240152455A1

公开(公告)日：2024-05-09

申请号：US18053908

申请日：2022-11-09

Applicant: Lemon Inc.

Inventor： Peng XU ,  Ping Zhou ,  Chaohong Hu ,  Fei Liu ,  Changyou Xu ,  Kan Frankie Fan

IPC: G06F12/0804 ,  G06F12/02

CPC classification number: G06F12/0804 ,  G06F12/0246 ,  G06F12/0292 ,  G06F2212/7201

Abstract: Described are examples for storing data on a storage device, including storing, in a live write stream cache, one or more logical blocks (LBs) corresponding to a data segment, writing, for each LB in the data segment, a cache element of a cache entry that points to the LB in the live write stream cache, where the cache entry includes multiple cache elements corresponding to the multiple LBs of the data segment, writing, for the cache entry, a table entry in a mapping table that points to the cache entry, and when a storage policy is triggered for the cache entry, writing the multiple LBs, pointed to by each cache element of the cache entry, to a stream for storing as contiguous LBs on the storage device, and updating the table entry to point to a physical address of a first LB of the contiguous LBs on the storage device.

公开(公告)号：US20240135282A1

公开(公告)日：2024-04-25

申请号：US18525580

申请日：2023-11-30

Applicant: Lemon Inc.

Inventor： Ping Zhou ,  Jiaxin Shan ,  Wenhui Zhang ,  Fei Liu

IPC: G06Q10/0631 ,  G06Q10/067

CPC classification number: G06Q10/06313 ,  G06Q10/067

Abstract: A computing system is provided for modeling a deployment of heterogeneous memory on a server network. The computing system receives a user input of parameters including a memory ratio of local memory to heterogeneous memory in each server, a first relative throughput when an entire dataset is in local memory on a server, and a second relative throughput when the entire dataset is in heterogeneous memory on the server. Based on these parameters, the system determines a server ratio of a number of servers in an enhanced cluster with heterogeneous memory to a number of servers in a baseline cluster without heterogeneous memory, where the enhanced cluster and the baseline cluster deliver equivalent data throughput performance. Based on the parameters and the server ratio, a server network design is generated and outputted.

公开(公告)号：US20240103722A1

公开(公告)日：2024-03-28

申请号：US17953242

申请日：2022-09-26

Applicant: Lemon Inc.

Inventor： Ping Zhou ,  Chaohong Hu ,  Kan Frankie Fan ,  Fei Liu ,  Longxiao Li ,  Hui Zhang

IPC: G06F3/06

CPC classification number: G06F3/0608 ,  G06F3/064 ,  G06F3/0644 ,  G06F3/0673

Abstract: The present disclosure describes techniques of metadata management for transparent block level compression. A first area may be created in a backend solid state drive. The first area may comprise a plurality of entries. The plurality of entries may be indexed by addresses of a plurality of blocks of uncompressed data. Each of the plurality of entries comprises a first part configured to store metadata and a second part configured to store compressed data. Each of the plurality blocks of uncompressed data may be compressed individually to generate a plurality of compressed blocks. Metadata and at least a portion of compressed data associated with each of the plurality of compressed blocks may be stored in one of the plurality of entries based on an address of a corresponding block of uncompressed data. A second area may be created in the backend solid state drive for storing the rest of the compressed data.