shaloc / cluster-computing Goto Github PK

Try this

/etc/sysconfig/network-scripts/ifcfg-eth0
MACADDR= xx:xx:xx:xx:xx:xx

Since eth0 can't down for we connect it to NFS, this is the only way we setup it while system booting. Besides, it seems that changing /etc/init.d/network doesn't work.

Beside calc \pi, we may need a new script to test the ability of cluster.

And we shall prove it have a complex of O(n^2)+.

Using shell script can use less resources, but the script is writeen by bash
the sh can't run this script and it may throw an exception.

bootargs= ... machine=computer1
initrc set hosts according cmdline
# more /etc/init.d/hostname

#!/bin/sh
if [ "$1" = "start" ]
then
    machine=`cat /proc/cmdline |sed -e "s:\S.*machine=::g"|sed -e "s: .*$::g"`
    mkdir /tmp/$machine
    ipv4=`ifconfig eth0|grep "inet addr"|sed -e "s/.*inet addr://g"|sed -e "s: .*$::g"`
    cat > /tmp/$machine/hosts << EOF
127.0.0.1  localhost
EOF                                                                             
    echo "$ipv4 $machine" >> /tmp/$machine/hosts
    ln -sf /tmp/$machine/hosts /etc/hosts

    if [ -x /bin/hostname -o -x /usr/bin/hostname ]
    then
        echo Setting the hostname to $machine
        hostname $machine
    fi
fi

1. remove nameserver from /etc/resolv.conf. ( therefore can't access network by name)
2. keep /etc/resolv.conf working, add /etc/nsswitch.conf:
   hosts: files dns