Alibaba Group Holding Limited

Hangzhou Geo-chip Technology Co., Ltd.

Li Xu

Kai Li

Yuanyuan Dong

Puyuan Yang

Weibin Yan

Lei Wang

Feng Zhang

Jiesheng Wu

Qingda Lu

Liping Bao

Qinghua Ye

Yemin Sui

Zhiyong Lin

Xiaohui Pei

Leilei Tian

Junpu Chen

Methods and systems are provided for improving user authentication and access control by a network file system service in a multi-tenant public cloud environment by receiving a request for a connection to a file system from a file system client (client), sending an identification request for identification authentication of the client to a control system, receiving a response from the control system, establishing the connection to the file system upon determining that the connection to the file system is allowed based on cloud tenant information associated with the client, receiving an attempt to access the file system from the client by a sub-user, authenticating the sub-user based on the cloud tenant information, issuing a security token including a globally unique sub-user identifier of the sub-user, and using the security token to determine access rights of the sub-user to the file system for a subsequent request.

Authentication and authorization for cloud file system

The present disclosure discloses a startup circuit device, a filter and a receiver. The startup circuit device is applicable to the filter that includes a fully-differential operational amplifier and a common-mode feedback circuit device connected in sequence. Both the first startup input terminal and the first startup output terminal are connected to a first amplification input terminal of the fully-differential operational amplifier, and both the second startup input terminal and the second startup output terminal are connected to a second amplification input terminal of the fully-differential operational amplifier. The startup circuit device is configured to adjust a received input voltage to a target voltage during startup of the fully-differential operational amplifier, and output the target voltage to the fully-differential operational amplifier, such that the fully-differential operational amplifier operates at the target voltage, and stability of the fully-differential operational amplifier during the startup can be improved effectively.

Startup circuit device, filter and receiver

A data copy method comprises: acquiring, by a destination server, a data block identifier, version information and hole information; transmitting, by the destination server, the data block identifier, the version information and the hole information to a source terminal server so as to enable the source server to find corresponding data according to the data block identifier, the version information and the hole information; receiving, by the destination server, a response message carrying the data transmitted by the source server and copying the data to a hole corresponding to the data block identifier, the version information and the hole according to the response message.

Data copy method and device

A method for updating data in a distributed storage system is disclosed. The method may comprise receiving, by a sender terminal device, an update request; obtaining, by the sender terminal device, update data and control information from the update request; sending, by the sender terminal device, the update data, via a data update request, to a receiver terminal device; and sending, by the sender terminal device, the control information, via a control information update request, to the receiver terminal device.

System, method, and apparatus for updating data in a distributed storage system

Growing community of inventors

Hangzhou, China

Li Xu