Alibaba Group Holding Limited

Tingtao Sun

Hua Cai

Qi Zhou

Hao Lin

Guangchuan Luo

Semi-structured source data is preprocessed to obtain text partitions to be stored into a data table with a first combined primary key including a structure thread primary key and a sequence value primary key. The structure thread primary key identifies a structure thread that is segmented into several consecutive intervals according to a determined or predetermined sequence. An inverted index table, created for the preprocessed text partitions, includes a second combined primary key including the structure thread primary key and a keyword primary key. Corresponding to values of the primary keys in the second combined primary key, related text partition sequence IDs are recorded as index values of the inverted index table. Index values having a same keyword primary key value but different structure thread primary key values are located in different rows in the inverted index table. The present techniques improve query efficiency of database index and facilitate updating.

Creating NoSQL database index for semi-structured data

An example method for generating a regular expression includes: acquiring a preset character string; acquiring a to-be-collected character string in the preset character string in response to a trigger instruction; recognizing a character string before the to-be-collected character string from the preset character string, the character string before the to-be-collected character string being used as a first character string; recognizing a character string after the to-be-collected character string from the preset character string, the character string after the to-be-collected character string being used as a second character string; and generating a regular expression of the to-be-collected character string by a first preset rule according to character features of the to-be-collected character string, the first character string and the second character string. The techniques of the present disclosure generate the regular expression of the character string needed by a user.

Generating regular expression

Embodiments of the present application relate to a method, a system and a computer program product for monitoring execution of a user request on a distributed system. A method for monitoring execution of user requests on a distributed system is provided. The method includes sampling a user request received by a plurality of servers, generating an identifier corresponding to the user request sampled by the plurality of servers, injecting tracking interfaces in advance into processes executed by the plurality of servers, determining whether the current process contain the identifier corresponding to the user request, in the event that the current process contains the identifier corresponding to the user request when the process has executed the tracking interface, recording information corresponding to the identifier relating to the function indicated by the tracking interface and generating a log, and individually collecting the generated log according to the corresponding identifier.

Method and system for monitoring execution of user request in distributed system

Embodiments of the present application relate to a code coverage rate determination method, a code coverage rate determination system, and a computer program product for determining code coverage rate. A code coverage rate determination method is provided. The method includes retrieving source code of a program, determining theoretical number of log file output points included in the source code and location information of the log file output points, retrieving log files actually outputted during the execution of the program, determining an actual number of log file output points of the actual outputted log files based on the location information of the corresponding log file output points recorded in each log file, and determining a code coverage rate of the program based on the theoretical number of log file output points and the actual number of the log file output points of the actual outputted log files.

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Hangzhou, China

Tingtao Sun