On 9/22/07, Paul B. Henson <[EMAIL PROTECTED]> wrote: > On Fri, 21 Sep 2007, James F. Hranicky wrote: > > > > It just seems rather involved, and relatively inefficient to continuously > > > be mounting/unmounting stuff all the time. One of the applications to be > > > deployed against the filesystem will be web service, I can't really > > > envision a web server with tens of thousands of NFS mounts coming and > > > going, seems like a lot of overhead. > > > > Well, that's why ZFS wouldn't work for us :-( . > > Although, I'm just saying that from my gut -- does anyone have any actual > experience with automounting thousands of file systems? Does it work? Is it > horribly inefficient? Poor performance? Resource intensive?
Used to do this for years with 20,000 filesystems automounted - each user home directory was automounted separately. Never caused any problems, either with NIS+ or the automounter or the NFS clients and server. And much of the time that was with hardware that would today be antique. So I wouldn't expect any issues on the automounting part. [Except one - see later.] That was with a relatively small number of ufs filesystems on the server holding the data. When we first got hold of zfs I did try the exercise of one zfs filesystem per user on the server, just to see how it would work. While managing 20,00 filesystems with the automounter was trivial, the attempt to manage 20,000 zfs filesystems wasn't entirely successful. In fact, based on that experience I simply wouldn't go down the road of one user per filesystem. [There is one issue with automounting large number of filesystems on a Solaris 10 client. Every mount or unmount triggers SMF activity, and can drive SMF up the wall. We saw one of the svc daemons hog a whole cpu on our mailserver (constantly checking for .forward files in user home directories). This has been fixed, I believe, but only very recently in S10.] -- -Peter Tribble http://www.petertribble.co.uk/ - http://ptribble.blogspot.com/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
