From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andreas Dilger Subject: Re: Reiserfs with Samba vs NetApp Filer Date: Sun, 13 Oct 2002 21:50:50 -0600 Message-ID: <20021014035050.GO3045@clusterfs.com> References: <20021012150028.G14731@vestdata.no> <200210121600.39712.bofh@coker.com.au> <3DA89A37.2070801@namesys.com> <20021012222950.GK3045@clusterfs.com> <3DA8CAF5.7050203@namesys.com> <20021013063809.GL3045@clusterfs.com> <3DA97993.4090403@namesys.com> <20021013154645.GM3045@clusterfs.com> <20021013181003.D24037@vestdata.no> <3DA9A128.5000206@namesys.com> Mime-Version: 1.0 Return-path: list-help: list-unsubscribe: list-post: Errors-To: flx@namesys.com Content-Disposition: inline In-Reply-To: <3DA9A128.5000206@namesys.com> List-Id: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Hans Reiser Cc: Ragnar =?unknown-8bit?Q?Kj=F8rstad?= , Russell Coker , reiserfs-list@namesys.com On Oct 13, 2002 20:36 +0400, Hans Reiser wrote: > Andreas, very briefly, you want to find things in reiserfs by their > keys, and you have no need for any directory entries at all, and having > those directory entries will add substantial overhead. Your metadata > manager can probably track references, and if so there is no need for > the FS to track it. On the storage target (OST), we don't really need directories at all. The obdfilter uses a 64-bit object number (generated by the OST itself) to refer to "files" it is storing, so as long as the reiserfs keys fit into 64 bits, having a very efficient lookup method would be ideal. The metadata server (MDS) of course must handle directories as a normal filesystem does, because it is in charge of presenting a normal filesystem heirarchy to applications. Cheers, Andreas -- Andreas Dilger http://www-mddsp.enel.ucalgary.ca/People/adilger/ http://sourceforge.net/projects/ext2resize/