公开(公告)号：US20200327061A1

公开(公告)日：2020-10-15

申请号：US16913680

申请日：2020-06-26

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Chunhua Tan ,  Weiqiang Jia ,  Ding Li ,  Wenqiang Yang ,  Liyu Wang ,  Pengli Ji

IPC: G06F12/0862 ,  G06F12/0866

Abstract: In a data prefetching method, a storage device obtains a first sequence stream length and a first access count of a target logical block after execution of a first data access request is completed. When a second data access request is received, the storage device modifies the first sequence stream length to a second sequence stream length and modifies the first access count to a second access count. The storage device further calculates a sequence degree of the target logical block based on the second sequence stream length and the second access count, and performs a data prefetching operation when the sequence degree of the target logical block exceeds a first prefetch threshold.

公开(公告)号：US12079472B2

公开(公告)日：2024-09-03

申请号：US17732675

申请日：2022-04-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Bang Liu ,  Liyu Wang ,  Kun Guan ,  Wen Yang ,  Jianqiang Shen

IPC: G06F3/06

CPC classification number: G06F3/0608 ,  G06F3/064 ,  G06F3/0671

Abstract: A data reduction method, apparatus, and computing device and a storage medium are provided. The method includes: when reduction is to be performed on a to-be-reduced data block, obtaining a fingerprint of the to-be-reduced data block; forming an index set based on the fingerprint of the to-be-reduced data block by using index information of data blocks with identical fingerprints; and performing, in the to-be-reduced data block based on the fingerprint of the to-be-reduced data block, data reduction processing on a data block to which index information in a same index set belongs.

公开(公告)号：US12073102B2

公开(公告)日：2024-08-27

申请号：US18340853

申请日：2023-06-24

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Kun Guan ,  Shaohui Quan ,  Liyu Wang ,  Jianqiang Shen

IPC: G06F3/06 ,  H03M7/30

CPC classification number: G06F3/0641 ,  G06F3/0608 ,  G06F3/0673 ,  H03M7/30 ,  G06F3/0674 ,  G06F3/0676

Abstract: In a method for compressing data, a storage system determines whether deduplication can be performed on a target data block. When deduplication cannot be performed on the target data block, the storage system obtaining a similar fingerprint of the target data block, and determines, based on the similar fingerprint, a combined data block group to which the target data block belongs. The storage system then performs similar compression on the target data block based on a reference block in the combined data block group.

公开(公告)号：US11755207B2

公开(公告)日：2023-09-12

申请号：US17840982

申请日：2022-06-15

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Kun Guan ,  Bang Liu ,  Liyu Wang ,  Shaohui Quan ,  Liangxiang Zhang

IPC: G06F12/00 ,  G06F3/06

CPC classification number: G06F3/0613 ,  G06F3/0608 ,  G06F3/0641 ,  G06F3/0683

Abstract: A data storage method in a storage system and a related system. The method includes: calculating a similar fingerprint of first to-be-stored data to obtain a first similar fingerprint, where the first similar fingerprint is for determining whether the first to-be-stored data is similar to stored data; determining reference data based on the first similar fingerprint, where a similar fingerprint of the reference data is the first similar fingerprint; determining first differential data between the to-be-stored data and the reference data based on the reference data, where the reference data is stored in a first storage unit; and storing the first differential data in a second storage unit, where the first storage unit and the second storage unit belong to a read range of a same read I/O.

公开(公告)号：US20230333764A1

公开(公告)日：2023-10-19

申请号：US18340853

申请日：2023-06-24

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Kun Guan ,  Shaohui Quan ,  Liyu Wang ,  Jianqiang Shen

IPC: G06F3/06 ,  H03M7/30

CPC classification number: G06F3/0641 ,  G06F3/0608 ,  G06F3/0673 ,  H03M7/30 ,  G06F3/0674

Abstract: In a method for compressing data, a storage system determines whether deduplication can be performed on a target data block. When deduplication cannot be performed on the target data block, the storage system obtaining a similar fingerprint of the target data block, and determines, based on the similar fingerprint, a combined data block group to which the target data block belongs. The storage system then performs similar compression on the target data block based on a reference block in the combined data block group.

公开(公告)号：US20220147255A1

公开(公告)日：2022-05-12

申请号：US17579904

申请日：2022-01-20

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Kun Guan ,  Shaohui Quan ,  Liyu Wang ,  Jianqiang Shen

IPC: G06F3/06 ,  H03M7/30

Abstract: In a method of storing data block, a storage device has stored a plurality of data block groups, each data block group having a common part that is contained in another data block in that group. For a target block to be stored, the storage device selects from the data block groups a target data block group has one data block whose common part is identical to a part of the target data block. The storage device then saves the target block by storing a target reference block of the target data block group and differential data between the target data block and the target reference block.

公开(公告)号：US11099997B2

公开(公告)日：2021-08-24

申请号：US16913680

申请日：2020-06-26

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Chunhua Tan ,  Weiqiang Jia ,  Ding Li ,  Wenqiang Yang ,  Liyu Wang ,  Pengli Ji

IPC: G06F12/0862 ,  G06F12/0866

Abstract: In a data prefetching method, a storage device obtains a first sequence stream length and a first access count of a target logical block after execution of a first data access request is completed. When a second data access request is received, the storage device modifies the first sequence stream length to a second sequence stream length and modifies the first access count to a second access count. The storage device further calculates a sequence degree of the target logical block based on the second sequence stream length and the second access count, and performs a data prefetching operation when the sequence degree of the target logical block exceeds a first prefetch threshold.