Hot code loading

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To change a running system

Start erlang as a node

This is my /etc/X11/Xsession.d/80zhone. As you can see the erlang node's got a name "-sname moko" (a running erlang virtual machine is called an erlang node). And it's got a cookie "-setcookie SFEWRG34AFDSGAFG35235". 

#!/bin/sh -e
#zhone > /tmp/zhone.log 2>&1 &
/home/root/cean/start.sh -setcookie SFEWRG34AFDSGAFG35235 -sname moko -noshell -pa /home/root/trunk -s main start > debug.txt
renice -3 $!
exit 0


Every erlang node in your network should have a unique name, and a common cookie.


Load the code

To carry out Hot Code Loading you start a an erlang node on your host (remember to set a different name and to use the same cookie) and from the remote erlang shell type nl(your_modulename). Substitute your_modulename with the name of the module you want to load into the virtual machine.

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To change a running system

Start erlang as a node

This is my /etc/X11/Xsession.d/80zhone. As you can see the erlang node's got a name "-sname moko" (a running erlang virtual machine is called an erlang node). And it's got a cookie "-setcookie SFEWRG34AFDSGAFG35235". 

#!/bin/sh -e
#zhone > /tmp/zhone.log 2>&1 &
/home/root/cean/start.sh -setcookie SFEWRG34AFDSGAFG35235 -sname moko -noshell -pa /home/root/trunk -s main start > debug.txt
renice -3 $!
exit 0


Every erlang node in your network should have a unique name, and a common cookie.


Load the code

To carry out Hot Code Loading you start a an erlang node on your host (remember to set a different name and to use the same cookie) and from the remote erlang shell type nl(your_modulename). Substitute your_modulename with the name of the module you want to load into the virtual machine.