Icecream

Icecream is a software suite that allows you to build up a compile cluster. The goal is to speed up compiling by distributing the jobs over several computers. To do that, you need one compile-driver (the scheduler) and one or more daemons. As a start, have a daemon running on the computers earth and moon and run the scheduler on earth. Every daemon can trigger a cluster compilation, as well earth as moon.

Install it

To install icecream on SUSE, enter into a konsole:

yast -i icecream icecream-monitor

Icecream links /opt/icecream/bin/gcc to /usr/bin/icecc, and you have to use this for a distributed compile. So, change your PATH variable so icecream's gcc is found before gnu's gcc:

export PATH=/opt/icecream/bin:$PATH

and make this change persistent for login-shells:

echo "export PATH=/opt/icecream/bin:\$PATH" >> /etc/profile

and make this change persistent for non-login-shells:

echo "export PATH=/opt/icecream/bin:\$PATH" >> /etc/bash.bashrc

Run it

On every slave, start the daemon:

export PATH=/opt/icecream/bin:$PATH
iceccd -d

And make sure your firewall is stopped:

rcSuSEfirewall2 stop

On your driver, start the scheduler:

export PATH=/opt/icecream/bin:$PATH
scheduler -d

You can now start building e.g. with 8 compile jobs distributed over the nodes:

make -j8 CC=/usr/bin/icecc

The monitor

There is a graphical monitor available that shows which computer is compiling what:

To see it, use the command

icemon

What happens

The daemon opens a socket on port 10245 and waits for requests to compile. You can check this with the following commands:

Show what ports are used by iceccd

duffman:/opt/icecream/bin # lsof -i | grep iceccd
iceccd    13193      root    8u  IPv4 119567      0t0  TCP *:10245 (LISTEN)
[...]

Show that port 10245 is really open

duffman:/opt/icecream/bin # nmap -p10245 localhost
[...]
PORT      STATE SERVICE
10245/tcp open  unknown
[...]

Kill your icecream daemon

duffman:/opt/icecream/bin # killall iceccd

Show the port is no longer open

duffman:/opt/icecream/bin # nmap -p10245 localhost
[...]
PORT      STATE  SERVICE
10245/tcp closed unknown
[...]

How to compile icemon

svn co https://svn.kde.org/home/kde/trunk/playground/devtools

See also

• http://en.opensuse.org/Icecream
• http://websvn.kde.org:80/trunk/icecream/ - icecream source
• http://websvn.kde.org/trunk/playground/devtools/icemon/ - icemon source