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MathGroup Archive 2004

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Re: launching a kernel on a remote linux machine through ssh from a linux machine

  • To: mathgroup at smc.vnet.net
  • Subject: [mg52447] Re: [mg52381] launching a kernel on a remote linux machine through ssh from a linux machine
  • From: Yasvir Tesiram <tesiramy at omrf.ouhsc.edu>
  • Date: Sat, 27 Nov 2004 01:41:05 -0500 (EST)
  • References: <200411251049.FAA21498@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Did I I say use a RAW MathLink connection? On second thoughts don't.

Cheers
Yas


On Thu, 25 Nov 2004 thewalterq at hotmail.com wrote:

> Greetings:
>
> I am trying to launch a kernel on a faster linux machine (call it
> "fast.here.com", IP address "5.5.5.5") and connect it to my local
> front end (on "lamo.here.com", IP address "7.7.7.7"). Both run
> Mathematica 5.0.1.0 on Fedora Linux (3 and 2, respectively). The
> connection goes through ssh.
>
> On the front end on lamo.here.com I now try to add a kernel with
> "Kernel Configuration Options...".
>
> If I select as the remote machine the same as my local machine
> "lamo.here.com", everything works fine. I know I could do this without
> going through TCP/IP, but just for checking it out:
>
>    Arguments passed to MLOpen:
>       -LinkMode Listen -LinkProtocol TCPIP
>    String passed to shell to launch kernel:
>       ssh lamo.here.com "math -mathlink -LinkMode Connect
> -LinkProtocol TCPIP -LinkName `linkname`"
>
> Choosing this to be the notebook's kernel, once I execute the first
> calculation it pops up a box saying "Link created on
> 35945 at 7.7.7.7,35946 at 7.7.7.7", then asks for the password for
> lamo.here.com, and everything works fine; I can run calculations as
> usual.
>
> The problem appears when I change the above string to
>       ssh fast.here.com "math -mathlink -LinkMode Connect
> -LinkProtocol TCPIP -LinkName `linkname`"
> (note that only the computer name has changed). When I do the first
> calculation, I still get a box saying "Link created on
> 35950 at 7.7.7.7,35951 at 7.7.7.7", then one asking for the password for
> fast.here.com. But then it stops doing anything. The result is that I
> have no kernel running, neither on fast.here.com nor on lamo.here.com,
> and no result is being displayed.
>
> Does anyone know what I'm doing wrong? I've been searching through old
> messages on this forum and could not figure it out.
>
> Thanks!
>      Walter.
>


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