公开(公告)号：US11899580B2

公开(公告)日：2024-02-13

申请号：US17680739

申请日：2022-02-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Chunhua Tan ,  Feng Xia

IPC: G06F12/06

CPC classification number: G06F12/0646 ,  G06F2212/1021 ,  G06F2212/1044 ,  G06F2212/601

Abstract: A cache space management method and apparatus are disclosed. In the method, first, a hit rate of the read cache of the storage system is obtained; and then, a size of the read cache and a size of the metadata cache are adjusted based on the hit rate of the read cache. In the foregoing technical solution, the size of the read cache and the size of the metadata cache are dynamically adjusted by using the hit rate of the read cache as a decision factor. For example, when the hit rate of the read cache is relatively high, the size of the read cache may be increased.

公开(公告)号：US10417186B2

公开(公告)日：2019-09-17

申请号：US15085626

申请日：2016-03-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Feng Xia

IPC: G06F17/30 ,  G06F16/17 ,  G06F16/11 ,  G06F16/21 ,  G06F12/06 ,  G06F3/06 ,  G06F3/12

Abstract: A method for migrating a file in a storage device. The storage device obtains a snapshot of metadata of the file. The snapshot includes logical addresses of data blocks of the file and first write time points of the data blocks. The storage device identifies a logical address of a target data block and a first write time point of the target data block. Then, the storage device obtains a second write time point from the metadata of the file. The second write time point indicates a latest time point of writing the target data block into the storage device. If the first write time point of the target data block is identical to the second write time point, the storage device migrates the target data block to pre-allocated continuous storage space. Thereby, disk defragmentation can be achieved.

公开(公告)号：US20240080095A1

公开(公告)日：2024-03-07

申请号：US18506656

申请日：2023-11-10

Applicant: Huawei Technologies Co., Ltd.

Inventor： Wei Wang ,  Feng Xia ,  Gang Zheng

IPC: H04B10/03

CPC classification number: H04B10/03

Abstract: In accordance with an embodiment, a method includes determining, by a standby optical line terminal (OLT), that a primary OLT has stopped sending a downlink optical signal over a first management channel; sending, by the standby OLT, a ranging request to a first optical network unit (ONU), over a second management channel, where the first ONU is one of the at least one ONU, and the second management channel is a channel between the standby OLT and the at least one ONU; and obtaining, by the standby OLT, a distance parameter between the first ONU and the standby OLT based on a ranging response received from the first ONU over the second management channel.