From mboxrd@z Thu Jan 1 00:00:00 1970 From: Victor Danilchenko Subject: Re: Automount 5 LDAP filtering question Date: Fri, 23 Mar 2007 12:09:05 -0400 Message-ID: <4603FBA1.8020408@cs.umass.edu> References: <4603ECD7.8080906@cs.umass.edu> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: autofs-bounces@linux.kernel.org Errors-To: autofs-bounces@linux.kernel.org To: autofs@linux.kernel.org Jim Carter wrote: > On Fri, 23 Mar 2007, Victor Danilchenko wrote: > >> The problem is this. We have individual systems indirectly automounting >> each other. As such, it is useful for them to be able to keep both the >> automounted and the local mountpoints in the same tree, for performance >> reasons (rather than mount self over NFS from the /exports/myhost >> directory into the /nfs/myhost directory, for example). With automount > > Which operating system is this? We're running Linux (with autofs-4), and > autofs is smart enough to recognize and do a bind mount of local > filesystems, so there is no overhead. Interesting. I didn't know that. I am sure it's the same way on Fedora and RHEL. I hope someone will offer a way to customize the LDAP filter, but if it's not possible, we will go with your idea, thanks. Thanks a bunch. > We don't do anything special; > however, the local filesystems are in one place (/h[1-9], /m[1-9]) while > the automounted references are elsewhere (/net/$HOSTNAME). Here's an > excerpt from /etc/mtab on a typical host, Sunset: > > /dev/sdb2 /m1 ext3 rw,acl,user_xattr,quota 0 0 > automount(pid4220) /net autofs rw,fd=4,pgrp=4220,minproto=2,maxproto=4 0 0 > automount(pid4094) /net/sunset autofs rw,fd=4,pgrp=4220... > /m1 /net/sunset/m1 none rw,bind 0 0 <== Bind mount here > automount(pid21051) /net/julia autofs rw,fd=4,pgrp=4220... > julia:/h1 /net/julia/h1 nfs rw,,addr=128.97.4.5... <== NFS mount here > > So at least on Linux you don't need to exclude local filesystems from the > automount map. I believe Solaris also has this situation covered but I > can't remember just what it does. > > James F. Carter Voice 310 825 2897 FAX 310 206 6673 > UCLA-Mathnet; 6115 MSA; 405 Hilgard Ave.; Los Angeles, CA, USA 90095-1555 > Email: jimc@math.ucla.edu http://www.math.ucla.edu/~jimc (q.v. for PGP key) -- | Victor Danilchenko + Unix: Your gun, Your bullet, | | danilche@cs.umass.edu | Your foot, Your choice. | | CSCF | 5-4231 | MS: Same as Unix, BUT: No choice, | +-----------------------+ and We Aim Higher. |