Blog
  • What happens if you don't understand what the system is doing behind your back

    Transaction fees aren't the only thing. Be careful not to run out of gas.

     

  • How to start the old Cisco firewall management utility on modern Linux systems

  • Sehr wenig CPU- und Festplattenaktivität. Was könnte es sein? Auf einem unserer Proxmox 6-Server hatten wir kürzlich das Problem, dass Icinga sich ständig über einen hohen Lastdurchschnitt beschwerte. Der Lastdurchschnitt selbst ist eine seltsame Metrik, er misst die Länge der Ausführungswarteschlange. Das bedeutet, die Anzahl der Prozesse die darauf warten, ausgeführt zu werden. Dies kann entweder daran liegen, dass sie darauf warten, dass die CPU-Zeit verfügbar wird, oder dass Daten von der Festplatte eingehen.

  • But very little CPU and disk activity. What could it be?

    On one of our Proxmox 6 servers we recently had the issue of Icinga constantly complaining about a high load average. The load average itself is a bit of a weird metric, it measures the length of the run queue. That means how many proceses are waiting to get run - this could either be because they are waiting for CPU time to become available or data to arrive from the disk.

  • Vor vielen Jahren habe ich eine Website "geerbt", die viele benutzergenerierte Inhalte enthält. Ich kann hier nicht auf Details eingehen, um die unschuldigen Schuldigen - und mich selbst - zu schützen.

  • Many years ago I "inherited" a website which contains a lot of user generated content. I can't go into details here in order to protect the innocent guilty - and myself.

  • I'm here to annoy telemarketers.

    Do you ever get those calls where people want to sell you stuff? Or tell you about "great" investment opportunites? I heard it's quite common in the US because call termination to the US costs next to nothing - and they have a common language with a country which most of those calls originate from: India.

  • ... or has it? Supermicro isn't sure.

    I mange quite a few servers with Supermicro boards. I kind of like them because the out of band management solution on Supermicro is not the worst thing ever. I haven't found any good remote KVM solution yet, but the solution made by ATEN is at least partially usable. That is, unless you log in to the webapplication, only to be kicked out again: