On Mon, May 24, 2010 at 8:11 AM, Neil Brown <neilb@xxxxxxx> wrote: > On Mon, 17 May 2010 09:54:12 +1000 > hce <webmail.hce@xxxxxxxxx> wrote: > >> On Sun, May 16, 2010 at 6:26 PM, hce <webmail.hce@xxxxxxxxx> wrote: >> > Hi, >> > >> > I posted following message on list, but did not see it on list, sorry >> > if it is duplicated. >> > >> > I have an application to use NFS over FUSE, if I keep typing "ls" in >> > the same directory, the client NFS only sent GETATT, no more READDIR, >> > all directory contents displayed on screen came from NFS cache. That >> > caused many problems and I'd like to disable NFS client cache. But it >> > did not work when I add "-o noac" option to mount. >> >> I've just realised that the noac is only for NFS attribute cache, so >> add "-o noac" only generates more getatt for up paths, the "readdir" >> was still not called if I keep typing "ls" in the same directory. >> >> Does NFS has another cache for directory structure as well? It seems >> it displayed directory contents on the screen from cache as it did not >> call readdir to FUSe. > > (almost) all linux filesystems use the 'page cache' for storing parts or all > of files and directories. > Linux/NFS uses the page cache to store the contents of a directory. It will > normally only refresh the cached directory when the 'mtime' or the 'ctime' of > the directory (as reported by GETATTR) changes. I guess you were talking about NFS client uses the page cache to store contents of a directory. Is any way I can disable NFS to use page cache to store contents of a directory? I have an application which has its own cache, There are various problems as the NFS / FUSE does not work well together expecially it took excessive large time when to list large number files (100 K). Thanks NeilBrown. -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
