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：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.