Patent ID: 7693892
Filing Date: 2010-04-06
Classification: G06F

Abstract:
1. An NFS server comprising: a nonvolatile recording apparatus; a first lock information acquiring section to acquire identifiers of NFS clients that acquired locks before a restart of the NFS server and a first number of files that is a number of files for which the NFS clients have acquired the locks and records the identifiers and the first number in the nonvolatile recording apparatus; a second lock information acquiring section to determine if a request received after the restart is a lock reacquisition request and to acquire identifiers of NFS clients that reacquired the locks after the restart of the NFS server and a second number of files that is a number of files for which the NFS clients have reacquired the locks; and a lock reacquisition ending section to end the reception of lock reacquisition requests from the NFS clients if the second number of files for each of the NFS clients acquired by the second lock information acquiring section has become equal to the first number of files for each corresponding NFS client based on the first number of files acquired by the first lock information acquiring section for each NFS client and the second number of files acquired by the second lock information acquiring section for each NFS client regardless if an extended lock reacquisition period has elapsed.