[mvapich-discuss] mpdtrace issue...

[Sayantan Sur]

Hello Durga,

Choudhury, Durga wrote:

> Hi All
>
>  
>
> The `mpdtrace` command seems to have a bug in it (or is it by design?) 
> which is as follows:
>
>  
>
> If the hostname of my machine is foo_bar, mpdtrace prints only the 
> first part of it, i.e. foo. In our case, the nodes are in slots of a 
> VME chassis with hostnames such as board_1 board_2 etc, which become 
> all identical name for mpdtrace.
>
>  
>
> Until now, I was using and testing mvapich (just the MPICH2 part of 
> it) on an empty card cage with just two slots populated that I was 
> naming manually. In a fully loaded chassis that I am now testing, the 
> names are assigned automatically and the mpdring does not form, which 
> worked flawlessly before. I suspect this might be because of this 
> mpdtrace issue. Please help.
>

Thanks for bringing this up. Does "mpdtrace" work fine if the hostnames 
do not have underscore (_) in them?

I hadn't encountered underscores in host names, so I did a google 
search. I came across RFC-952, which deals with Internet host table 
specification. Particularly, it assumes that underscores are not present 
in a hostname.

"1. A "name" (Net, Host, Gateway, or Domain name) is a text string up to 
24 characters drawn from the alphabet (A-Z), digits (0-9), minus sign 
(-), and period (.). "

http://www.faqs.org/rfcs/rfc952.html

Thanks,
Sayantan.

-- 
http://www.cse.ohio-state.edu/~surs