Is it possible to update a working copy after another user committed a new version?

Hello forum,    my name is Michael and this is my first post :-)    The question is, is it possible to update a working copy automatically after another user committed a new file or a new file version?    We like to inform the user, if a new version of a file is available.  At the moment I see the possibility to execute svnlook changed or svn update every n minutes to get the latest changes but i don't like such polling mechanisms.    What is the common mechanism to keep track of new commits?      Thanks for your help!    Regards,  Micha