** Reply to message from Gordon Messmer <[EMAIL PROTECTED]> on Thu, 16 Jan 2003 
15:13:22 -0800


> On Thu, 2003-01-16 at 12:36, Jack Bowling wrote:
> > On Thu, Jan 16, 2003 at 11:33:29AM -0800, Gordon Messmer wrote:
> > > 
> > > The whole thing takes less than a day to set up.  NFS is available on a
> > > standard Server install of RHL, but I use this kickstart file instead:
> > > http://rh-install.prognet.com/kickstart/ks-73-default.cfg
> > > Set up the NFS share and LDAP or NIS access (in my case, already
> > > provided on other machines) on that server and it's done.
> > 
> > Gordon - Have you checked out the NFS over TCP version yet? I just
> > wonder if it is any faster than the portmap version. Perhaps others have
> > tried it?
> 
> No, NFS still defaults to UDP, and I haven't changed that particular
> setting.  However, I'm pretty sure you still need portmap when using NFS
> over TCP as it's used for the initial mount process.

As coincidence would have it, I stopped in at my fave book store at lunch today and 
what is there in the rack but the Dec/Jan British issue of Linux Magazine (pricey with 
the exchange to Canuck Bucks but well worth it). Therein is a very nice how-to article 
about shh and tunnelling using the new tcp capabilities of NFS. The article states 
that with the TCP-enabled version, UDP is not used at all and portmap does not need to 
be running since you can take care of all the mount setup in fstab.
 
> In any case, NFS over TCP should not gain you speed on an "ideal
> network" according to the NFS-HOWTO's optimization guide.  I'm going to
> go ahead and call my network "ideal" since the whole cluster sits on a
> very good switch, and shares it with very little else.

Indeed, the above article also states that speed gain is not the issue. The real gain 
is in security. You can turn off portmapper and you only have to expose your ssh port 
via tcp in your firewall rules. Big wins in my book.

jb

-- 
Jack Bowling
mailto: [EMAIL PROTECTED]



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