1. A computer implemented method for modifying an entry name in a directory server, comprising: modifying entry mapping information in a directory database, in response to a request to modify at least one entry name, wherein each piece of entry mapping information is used for indicating a correspondence relation between pre-modification entry name information and post-modification entry name information; and asynchronously performing a modifying operation of the entry name in accordance with respective pieces of entry mapping information when a predetermined condition for updating the directory database is met.