Networking at home

In this post we will measure the performance on the PPPoE multilink over 2 gigabit connection.

In this post we will measure the performance of balance-rr bonding over 2 gigabit ethernet connections.

I had a dream, to connect two computers on my Home network with two gigabit ethernet connections and have a 2 gigabit connection to use. However even after a lot of experimenting I could not get real benefits in the everyday use. The closest I could get was the PPPoE multilink setup. In this series of post I will share same of the test results for a normal one gigabit network, a bonded 2 gigabit network and a PPPoE multilink 2 gigabit network.

VirtualBox has a built in solution for automatically starting and stopping vitual machines, as it is well explained in this post . However, I have a lot of virtual machines, and depending on what I am doing a different set of machines are running. I am not in a critical environment, therefore my vm host is set to automatically install updates, and if needed restart. In order not to loose the virtual machines I have written a small systemd service, which on shutdown saves all running virtual machine states and on restart starts them again.

An a server it has no advantage the GRUB and the Linux kernel is booting up in graphical mode, as it is only hiding the potential error messages. The following is a simple receit to switch it off.

We all know that to have the array device names persist you have to do:  mdadm --detail --scan >>/etc/mdadm/mdadm.conf However this is not enough, this has to be also updated in initram, so the easiest way to do it, is by running: dpkg-reconfigure mdadm This will automatically update the initram. (I do not mention here, that after piping the array list to /etc/mdadm/mdadm.conf, it is very practical to manually check if everything is correct, to avoid duplicate arrays or old not-any-more existing arrays.)

Using iSCSI is very usefull even in home environments. In Linux on the server side you can use TGT for this purpose, usually you can manage it weasily with Webmin , but I did not found the correct way to add a file name with spaces to the /etc/tgt/targets.conf. So finally I maked a symlink to the file and added the link to the config file and it workied. ln -s /media/disk/file\ with\ spaces\ in\ name.img /home/user/iscsitarget And put the /home/user/iscsitarget in yout TGT config file.