원래 이름 기록: Alipay (Hangzhou) Information Technology Co., Ltd.

The present disclosure provides methods and apparatuses for writing and searching vector data in a vector database. An example method includes receiving a write request for writing target vector data into a vector database, adding index update information corresponding to the target vector data to a first index of the vector database in a memory table, where the first index is a memory-based real-time read-write vector graph index, in response to flushing the memory table to a disk, writing the index update information of the first index in the memory table into a distributed file system, and converting the first index in the distributed file system into a second index, where the second index is a disk-based vector graph index.

Embodiments of this specification provide methods and apparatuses for importing graph data online and graph database systems. In an example method for importing graph data online, graph data stored in a first storage format are acquired from a data source; external sorting is performed on the graph data to obtain sorted graph data; the sorted graph data are packaged based on a second storage format specified in a target graph database, to obtain a graph data file to be imported and a corresponding metadata file; and storage location information of the graph data file to be imported and the corresponding metadata file is provided to a graph database server, so that the graph database server imports the graph data file to the target graph database, and updates a metadata file corresponding to the target graph database based on the corresponding metadata file.

In an implementation, a first party or a third party updates, by adding an offset to the first fragment, two local fragments held by the local party, where the offset enables offset data obtained by performing addition on updated fragments of each party to be greater than or equal to 0. Multi-party joint computation is performed by using the two updated local fragments together with fragments held by the other two parties to obtain two overflow fragments of an overflow bit and in a second ring for performing a modulo operation on a second value of an n power of 2, m is less than n; and the overflow bit indicates whether the offset data is greater than or equal to the first value. Two converted fragments are obtained in the second ring based on the two updated local fragments, the two overflow fragments, and the offset.