Re: Need application ...

Hello Joel,


  There's a "yardstick" value for each host.  If you set your
home node to a very low value (making it look like a very 
slow computer) while you set the other cluster nodes to a 
very high value (making them look like very fast computers),
then you might get what you're after.  

  The user-space tool "mosctl" allows manipulation of this 
value.


See also;
  http://article.gmane.org/gmane.linux.cluster.openmosix.general/9356
  http://www.democritos.it/~baro/sw/man/mosctl.1.html
  http://www.linux.com/howtos/openMosix-HOWTO/x739.shtml


----- Original Message -----
>From: "Joel Hollingsworth" <[email protected]>
>To: "Bruce Knox" <[email protected]>
>Subject:  Re: [openMosix-general] Need application ...
>Date: Sun, 20 Nov 2005 13:17:10 -0500
>
> Thanks for the reply Bruce.
> 
> I am looking for an application that performs fairly poorly on an  
> openMosix cluster due to the fact that it migrates quite often. I was  
> hoping that "make -j" suggestion would generate many (mostly  
> unnecessary) short-lived migrations.
> 
> I have implemented a low-level single-segment networking protocol  
> that can be used to replace TCP on a local cluster. I have ported  
> openMosix to use my protocol instead of TCP to perform migrations. I  
> wish to compare openMosix-using-my-protocol to openMosix-using-TCP.  
> The only possible advantage I might have is due the amount of time to  
> migrate a process. If I compare the two using a CPU-bound job, then  
> the saved time in migration will be mostly hidden by the time spent  
> on on the CPU.
> 
> I wanted a real-world application if at all possible, but in absence  
> of that I will fall back to a much more contrived application. I have  
> timings based on individual migrations (time to migrate a single  
> process of a certain size). I am looking for an application where  
> using my protocol shows an obvious overall wall-clock time 
improvement.
> 
> -joel
> 
> On Nov 20, 2005, at 12:18 PM, Bruce Knox wrote:
> > Joel, your objective is not clear to me.  You said you wanted to  
> > see many migrations with a real-world application, but what is the  
> > point of having the cluster migrate unnecessarily?  Are you just  
> > wanting to observe the migrations?
> 
> 
> 
> 
> 
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--
Ian Latter
Late night coder ..
http://midnightcode.org/



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