Hi This is a quick general NFS server question. Does the NFSv4x specification require or recommend that: the NFS server, after some reasonable time, should / must close orphan / zombie open files ? On several NAS platforms I have seen large numbers of orphan / zombie open files "pile up" as a result of Kerberos credential expiration. Does the Red Hat NFS server "deal with" orphan / zombie open files ? Thanks Andy Romero Fermilab