Patents by Inventor Chaoqian Cai

Chaoqian Cai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11188462
    Abstract: The present disclosure relates to a method, device and computer program product for managing an address mapping of a storage system. A group of data objects in the storage system are mapped to a group of buckets in the address mapping, the group of buckets being divided into a first group of active shards which are associated with a group of storage devices in the storage system, respectively. In the method, a first write request for writing a first data object to the storage system is received. The address mapping is updated so as to map the first data object to a first bucket in the group of buckets. The storage system is instructed to store the first data object to a first storage device in the group of storage devices, and the first storage device is associated with a first active shard to which the first bucket belongs. The storage system is managed based on the updated address mapping.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: November 30, 2021
    Assignee: EMC IP HOLDING COMPANY LLC
    Inventors: Frank Yifan Huang, Chaoqian Cai
  • Patent number: 11074133
    Abstract: Embodiments of the present disclosure relate to method, electronic device and computer readable medium of file management. The method comprises: generating an index structure of files in first backup data created at a first point of time, the index structure at least indicating a file name and associated path information of each of the files, the first backup data being incremental backup data relative to second backup data created at a second point of time prior to the first point of time; determining, for a folder involved in the first backup data, existing files that have been present at the second point of time in the folder based on the second backup data; and identifying files modified between the first point of time and the second point of time in the folder by determining whether the index structure comprises index items of the existing files. Accordingly, the modified files can be quickly identified and the computation complexity can be reduced.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: July 27, 2021
    Assignee: EMC IP HOLDING COMPANY LLC
    Inventors: Chaoqian Cai, Tony Jiayue Dong, Crane Xiaohe Shi
  • Publication number: 20210097012
    Abstract: Information processing is disclosed. For instance, a first polling interval between a current polling operation and a previous polling operation is polled, the first polling interval indicating a time period from an end of the previous polling operation to a start of the current polling operation. An execution status of the current polling operation is obtained, the execution status indicating whether an object to be polled for the current polling operation is obtained. Further, based on the first polling interval and the execution status, a second polling interval is determined between the current polling operation and the next polling operation, the second polling interval indicating a time period from an end of the current polling operation to a start of the next polling operation. In this way, the solution can provide a stable and efficient adaptive polling.
    Type: Application
    Filed: March 26, 2020
    Publication date: April 1, 2021
    Inventors: Chaoqian Cai, Frank Yifan Huang
  • Publication number: 20210073123
    Abstract: The present disclosure relates to a method, device and computer program product for managing an address mapping of a storage system. A group of data objects in the storage system are mapped to a group of buckets in the address mapping, the group of buckets being divided into a first group of active shards which are associated with a group of storage devices in the storage system, respectively. In the method, a first write request for writing a first data object to the storage system is received. The address mapping is updated so as to map the first data object to a first bucket in the group of buckets. The storage system is instructed to store the first data object to a first storage device in the group of storage devices, and the first storage device is associated with a first active shard to which the first bucket belongs. The storage system is managed based on the updated address mapping.
    Type: Application
    Filed: February 28, 2020
    Publication date: March 11, 2021
    Inventors: Frank Yifan Huang, Chaoqian Cai
  • Publication number: 20200133787
    Abstract: Embodiments of the present disclosure relate to method, electronic device and computer readable medium of file management. The method comprises: generating an index structure of files in first backup data created at a first point of time, the index structure at least indicating a file name and associated path information of each of the files, the first backup data being incremental backup data relative to second backup data created at a second point of time prior to the first point of time; determining, for a folder involved in the first backup data, existing files that have been present at the second point of time in the folder based on the second backup data; and identifying files modified between the first point of time and the second point of time in the folder by determining whether the index structure comprises index items of the existing files. Accordingly, the modified files can be quickly identified and the computation complexity can be reduced.
    Type: Application
    Filed: February 27, 2019
    Publication date: April 30, 2020
    Inventors: Chaoqian Cai, Tony Jiayue Dong, Crane Xiaohe Shi