Hello,
I've downloaded and compiled MPICH2 on a small cluster of PowerPC's
running linux (YDL 4.1). The cluster has home directories served
through NFS and common login accounts via NIS, with one of the
cluster nodes acting as the NFS/NIS server.
The machines reside on a campus network with IP addresses assigned
through DHCP. Accordingly, I've left the /etc/exports file alone,
[EMAIL PROTECTED] ~]# cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 muscovey localhost.localdomain localhost
While I've been able to get MPICH "mpd" deamon to run on a single
node, communication within the MPICH ring fails. The error I've seen
with mpdcheck follows,
[EMAIL PROTECTED] ~]# mpdcheck -l
**********
Your fully qualified hostname seems to be set to 'localhost'.
This generally means that your machine's /etc/hosts file
contains a line
similar to this:
127.0.0.1 mybox1 localhost.localdomain localhost
You probably want to remove your hostname from this line and
place it on
a line by itself with your ipaddress, like this:
$ipaddr mybox1
**********
**********
Your unqualified hostname resolves to 127.0.0.1, which is
the IP address reserved for localhost. This likely means that
you have a line similar to this one in your /etc/hosts file:
127.0.0.1 $uqhn
This should perhaps be changed to the following:
127.0.0.1 localhost.localdomain localhost
On my campus network, IP addresses are assigned by DHCP. To my
knowledge, this precludes the sort of "normal" /etc/hosts file like
the one following,
[EMAIL PROTECTED] ~]# cat /etc/hosts.novel
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
199.17.152.135 muscovey.workstations.winona.edu muscovey
where 199.17.152.135 is found through ifconfig -a, and accordingly, I
seem to be stuck with an /etc/hosts like,
Is there a workaround in /etc/hosts that allows only hostnames to be
specified? What is the proper format for /etc/hosts? Alternatively,
how should MPICH be configured for DHCP (rather than static IP)?
- - - - - - - - - - - - - - - - - - - - - - -
Nathan Moore
Physics
Winona State University
AIM:nmoorewsu
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