Abstract: A hash algorithm-based data storage method and apparatus are disclosed, including: pre-configuring L number of backend storage modules and a mapping relationship between identifiers of the backend storage modules and a modulo L operation; calculating a key value of data to be stored using a hash algorithm; performing a modulo L operation on the obtained key value and, using the mapping relationship between identifiers of the backend storage modules and the modulo L operation, outputting the key value in the modulo L operation and the corresponding data to a backend storage module with a corresponding backend storage module identifier; determining a preconfigured hash table in the backend storage module does not contain data to be stored, and storing the data to be stored and the corresponding key value. By using the present invention, requirements on storage devices can be lowered and the storage efficiency can be improved.

Abstract: A hash algorithm-based data storage method and apparatus are disclosed, including: pre-configuring L number of backend storage modules and a mapping relationship between identifiers of the backend storage modules and a modulo L operation; calculating a key value of data to be stored using a hash algorithm; performing a modulo L operation on the obtained key value and, using the mapping relationship between identifiers of the backend storage modules and the modulo L operation, outputting the key value in the modulo L operation and the corresponding data to a backend storage module with a corresponding backend storage module identifier; determining a preconfigured hash table in the backend storage module does not contain data to be stored, and storing the data to be stored and the corresponding key value. By using the present invention, requirements on storage devices can be lowered and the storage efficiency can be improved.

Abstract: A method for multi identifier log in of instant messaging system, setting corresponding relation between more than one user identifiers; after receiving log in request, instant messaging system allows the user to log in according to the corresponding relation among the said user identifiers. The present can support multi kinds of user identifier to log in simultaneously, which solves the problem that instant messaging system cannot support multi kinds of user identifier to log in simultaneously, making it more convenient for the user to log in an instant messaging system, and interesting quality of an instant messaging system is increased. The present invention is of stronger practicability.