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    DATA PROCESSING METHOD, DEVICE, COMPUTER APPARATUS AND STRORAGE MEDIUM
    3.
    发明公开
    DATA PROCESSING METHOD, DEVICE, COMPUTER APPARATUS AND STRORAGE MEDIUM 审中-公开

    公开(公告)号：EP4488837A1

    公开(公告)日：2025-01-08

    申请号：EP24181568.7

    申请日：2024-06-12

    Applicant: Xi'an Jiaotong University ,  DOUYIN VISION CO., LTD. ,  Lemon Inc.

    Inventor： TANG, Wei ,  ZHANG, Chi ,  YU, Fangxing ,  LI, Menghan ,  WANG, Bo ,  WU, Weiguo ,  LIU, Fei

    IPC: G06F12/0868 ,  G06F12/0871 ,  G06F12/123 ,  G06F12/127 ,  G06F3/06

    Abstract: The present disclosure provides a data processing method, a device, a computer apparatus (500) 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. Embodiments of the present disclosure divide data blocks of different data update types into different cache regions, which can efficiently manage write data of different update frequencies.

    HYBRID DESIGN FOR LARGE SCALE BLOCK DEVICE COMPRESSION USING FLAT HASH TABLE
    6.
    发明公开
    HYBRID DESIGN FOR LARGE SCALE BLOCK DEVICE COMPRESSION USING FLAT HASH TABLE 审中-实审

    公开(公告)号：EP4372539A1

    公开(公告)日：2024-05-22

    申请号：EP23208304.8

    申请日：2023-11-07

    Applicant: Lemon Inc.

    Inventor： ZHOU, Ping ,  LI, Longxiao ,  HU, Chaohong ,  LIU, Fei ,  FAN, Kan Frankie ,  ZHANG, Hui

    IPC: G06F3/06 ,  G06F12/02

    CPC classification number: G06F3/061 ,  G06F3/0608 ,  G06F3/0689 ,  G06F3/067 ,  G06F3/064 ,  G06F3/0661 ,  G06F12/02

    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.

    TRANSPARENT BLOCK DEVICE COMPRESSION USING HASH-TABLE
    9.
    发明公开
    TRANSPARENT BLOCK DEVICE COMPRESSION USING HASH-TABLE 审中-实审

    公开(公告)号：EP4404042A1

    公开(公告)日：2024-07-24

    申请号：EP23211762.2

    申请日：2023-11-23

    Applicant: Lemon Inc.

    Inventor： ZHOU, Ping ,  HU, Chaohong ,  FAN, Kan Frankie ,  LIU, Fei ,  LI, Longxiao ,  ZHANG, Hui

    IPC: G06F3/06 ,  G06F12/02

    CPC classification number: G06F3/0608 ,  G06F3/0631 ,  G06F3/064 ,  G06F3/0661 ,  G06F3/067 ,  G06F3/0689

    Abstract: Systems and methods for accessing block storage devices are provided. In particular, a computing device may receive (204) a write request including an uncompressed data and an uncompressed block address associated with the uncompressed data, generate (206) compressed data by compressing the uncompressed data, determine (208) 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.

    TECHNIQUES FOR INSTANCE STORAGE USING SEGMENT-BASED STORAGE
    10.
    发明公开
    TECHNIQUES FOR INSTANCE STORAGE USING SEGMENT-BASED STORAGE 审中-实审

    公开(公告)号：EP4369206A1

    公开(公告)日：2024-05-15

    申请号：EP23208640.5

    申请日：2023-11-08

    Applicant: Lemon Inc.

    Inventor： XU, Peng ,  ZHOU, Ping ,  HU, Chaohong ,  LIU, Fei ,  XU, Changyou ,  FAN, Kan Frankie

    IPC: G06F12/02 ,  G06F12/0866

    CPC classification number: G06F12/0246 ,  G06F2212/720120130101 ,  G06F2212/720320130101 ,  G06F2212/720720130101 ,  G06F12/0866

    Abstract: Described are examples for storing data on a storage device, including storing (702), in a live write stream cache, one or more logical blocks, LBs, corresponding to a data segment, writing (704), 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 (706), 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 (710) 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 (712) the table entry to point to a physical address of a first LB of the contiguous LBs on the storage device.

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