[mvapich-discuss] Re: Problems with hostname resolution and MPI_INIT() (Mike Heinz)

[Mike Heinz]

Ugh.

Yeah, we used to have a habit of naming our IB addresses things like "hostname_IB" or "hostname_INIC" which worked great until it completely scrambled the name resolution on some new machines we were using. That's when we found out that dashes are legal but underscores aren't.

That was a fun week, getting all the names straightened out.

--
Michael Heinz
Principal Engineer, Qlogic Corporation
King of Prussia, Pennsylvania

-----Original Message-----
From: Christian Guggenberger [mailto:christian.guggenberger at rzg.mpg.de] 
Sent: Wednesday, January 14, 2009 8:50 AM
To: Terrence.LIAO at total.com
Cc: Mike Heinz; mvapich-discuss at cse.ohio-state.edu
Subject: Re: [mvapich-discuss] Re: Problems with hostname resolution and MPI_INIT() (Mike Heinz)

> entry on /etc/hosts. Of course, with this, no more mvapich code change for 
> me.  May be the solution to this is let mvapich install guide to advise or 
> recommend to create entry for hostname in /etc/hosts, and to warn the 
> potential problem if added it into 127.0.0.1. (May be this is already been 
> done and, well, I have to admit that I did not read the entire install 
> guide. )
> 

I agree with Terrence to have such an advice in the FAQ/install guid. 
One could then also point out that hostnames should be RFC compliant. 
(people every now and then stumble across underscores in hostnames ...)

cheers.
 - Christian