With a shared index information file in a file sharing index manager, a distributed file system controls access to files based on access right obtained from the index information. Even when a host terminal operated by a user does not have directory information required, that host terminal may obtain an access right from the file sharing index manager without making access to the host terminals. The host terminals perform local management via file sharing managers to minimize accesses to the host terminals which are required until processing is completed.

 
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