Hello, Now, I'm searching $subject to check what application is match for glusterfs. I picked some differences from sources, bugzilla pages,or archived e-mails, but it may not be a good way to approach... If already there are some notes or wiki pages, please teach me it. only 3 items are in my list now: from local FS: - order of operation between two system calls are not guaranteed. http://lists.nongnu.org/archive/html/gluster-devel/2011-09/msg00002.html from NFS: - open same file twice in same process can be break the file. http://lists.nongnu.org/archive/html/gluster-devel/2011-09/msg00010.html Known issues: - rename(2) is not atomic (bug 1034) -- Kazuo Moriwaka