Angelesen #48 – Space, Post-Mortems and Loadtesting

Earlier this week I geeked out for the SpaceX landing. For starters, I planned the Dinner to be ready at T-5mins and then SpaceX pushed back the launch which meant my pizza finished nominal but the real launch got delayed. Well, that happens. If you missed the Falcon Heavy launch head over to youtube rewatch it..

But on with the links.

Exploiting modern microarchitectures (

Recently disclosed vulnerabilities against modern high performance computer microarchitectures known as ‘Meltdown’ and ‘Spectre’ are among an emerging wave of hardware-focused attacks. These include cache side-channel exploits against underlying shared resources, which arise as a result of common industry-wide performance optimizations.

More broadly, attacks against hardware are entering a new phase of sophistication that will see more in the months ahead. This talk will describe several of these attacks, how they can be mitigated, and generally what we can do as an industry to bring performance without trading security.

I saw this talk live at FOSDEM18.
If you are into microarchitectures and want to know the details of Spectre and Meltdown, look no further: 45 Minutes – an in depth look at Spectre and Meltdown – Brace yourself it’s a lot of information!

KPTI/KAISER Meltdown Initial Performance Regressions (

Applications that have high syscall rates include proxies, databases, and others that do lots of tiny I/O. Also microbenchmarks, which often stress-test the system, will suffer the largest losses. Many services at Netflix are below 10k syscalls/sec per CPU, so this type of overhead is expected to be negligible for us (<0.5%).

An close look on the performance implications around the Meltdown mitigations.

Epic Games’ Fortnite (

Fortnite hit a new peak of 3.4 million concurrent players last Sunday… and that didn’t come without issues! This blog post aims to share technical details about the challenges of rapidly scaling a game and its online services far beyond our wildest growth expectations.

I like to read post-mortems. It gives good advice on how I can improve when writing a post-mortem together with our team.

Online Security Guide for Journalists (

Part of our mission at ProtonMail has always been to give journalists, dissidents, and others the tools and knowledge they need to do their jobs safely. Journalists are one of the largest groups in our user community, and over the years, we have given dozens of talks and workshops on email security in order to help journalists stay safe.

Good Advice on online security for journalists (but it’s applicable for many people dealing with sensitive information)

Questions after talks at conferences (

At my own conferences, Write the Docs, we have established the norm of not having full audience questions. After each talk we ask the speaker to come to the front of the stage, and then have a conversation with members of the audience with questions.

A few hints on handling Questions at conferences differently.

Year in Pixels (

This tool was made to keep track of your mood during the entire year, using pixels. You can load this page every day and select how you’re feeling. The tool will keep track of your mood and give you a visual for how you’ve felt during the year.

One thing that struck me when I put the daily pictures i take during a year on one page. A year which seems like soo much time looks short when you boil it down to 365 moments.

IPFS is the Distributed Web (

A peer-to-peer hypermedia protocol to make the web faster, safer, and more open.

wg/wrk: Modern HTTP benchmarking tool (

wrk is a modern HTTP benchmarking tool capable of generating significant load when run on a single multi-core CPU. It combines a multithreaded design with scalable event notification systems such as epoll and kqueue.

Interesting tool as load generator for loadtests

10 open-source Kubernetes tools for highly effective SRE and Ops Teams (

If you run kubernetes you should give yourself a few minutes going trough those tools and check if some of them could help you in your daily work :)
I started looking at kube-ops-view which is already quite interesting.

A Love Letter to Plain Text (

General Nerdery with plain text blogging systems :)

Basecamp doesn’t employ anyone in San Francisco, but now we pay everyone as though all did (

We don’t actually have anyone who lives in San Francisco, but now everyone is being paid as though they did. Whatever an employee pockets in the difference in cost of living between where they are and the sky-high prices in San Francisco is theirs to keep.

Interesting take on salaries at Basecamp

2017 – In Stichworten!

Eigentlich sollte man jedes Jahr kurz auf die wichtigsten Geschehnisse zurückblicken. Wieso das jetzt erst ende Januar kommt. Weil ich hier das schreiben habe ;) 12 Monate einige Stichworte:

  • Januar – Meine letzten Diensttage sind gezählt
  • FebruarDrupal Mountain Camp in Davos
  • März – Insomhack in Genf und DrupalCamp London
  • April – Amazee10 in Südafrika Workshops, Surfen und Reisen
  • Mai – Die erste Ausgabe der DevOpsDays Zürich geht über die Bühne
  • Juni – Mitsommerfestival, Mittagsschwumm in der Limmat, TEDxBasel
  • Juli – Ferien die Temporär aufgrund schlechtem Wetter abgebrochen werden, Klettersteige ohne Weitsicht, Wanderungen bei Nacht
  • AugustWildhornhütte, Im Kino im Kocherpark zwei Wochen Openairkino vorgeführt!
  • September – 9 Monate nach dem letzten Diensttag den ganzen Karsumpel abgeben, DrupalCon in Wien
  • Oktober – San Francisco → Berkeley (Bay Area Drupal Camp) → Austin Texas, Teamworkshop
  • November –  Zürich → Basel (Swiss Innovation Forum) → Zürich (TEDxZürich) → Warschau (DevOpsDays Warsaw) → Genf → Bern (Kaffee trinken und Pläne aushecken) → Zürich (Wäsche waschen… )
  • Dezember – Budapest (Freunde besuchen) -> Zürich -> Leipzig (34C3) -> Zürich (31.12.2017)

Den Vorwurf viel unterwegs zu sein kann ich als FalschNeuheit abtun, ich war im 2017 nämlich 83% des Jahres in der Schweiz (Das entspricht einer Gesamtheit von 304 Tagen)! Sascha meinte kürzlich, dass der Fakt das ich Daten über meine Anwesenheitszeit in der Schweiz hätte schon Grund genug sei mich damit aufzuziehen. Naja unrecht hat er nicht.

Details? Ja Details!

Dank selbstauferlegter Selbstüberwachung habe ich natürlich tägliche Standortdaten über mich gesammelt. Basierend auf meinem Standort um 12:00 Uhr Schweizer Zeit. Ja der Habi macht das immer noch schöner!

Angelesen #47 – Zukunftsmusik, Blockchain and Power-over-the-Air

A mixed bunch of Links a few in German a few in English. Enjoy!

Work and Travel – als Digitalnomade mit vier Kids rund um die Welt (

Erfahrungsbericht von AppsWithLove zum Thema Work & Travel

Deutschland in der Zukunft: Wie wir 2037 leben werden (

Zukunftsmusik Longread

Blockchains: How to Steal Millions in 2^64 Operations (

TL;DR: you can hijack certain Lisk accounts and steal all their balance after only 264 evaluations of the address generation function (a combination of SHA-256, SHA-512, and a scalar multiplication over Ed25519’s curve).

On Blockchain Security

Podcast Transcription with Amazon Transcribe (

Transcribing Audio with Amazon Transcribe – Sounds too good to be true

What Really Happened with Vista: An Insider’s Retrospective (

This AA Battery Sucks Power Right Out of the Air (

[…] is that the transmitter broadcasts a directed and concentrated RF signal towards a given device in a room, which is absorbed by the gadget’s own RF antennas inside, and turned into usable power.

Woah! That’s some quite interesting piece of technology!

How I Shipped Six Side Projects in 2017 (

Light Traffic (

Traffic lights are a 150-year-old technology originally conceived for horse carriages. Will they survive the advent of autonomous vehicles?

Very interesting approach that asks if the intersections with traffic lights might be a thing of the past as soon as a lot of vehicles will be autonomous.

Eine Fotoschau als perfekte Cashcow (

Leider leider leider finde ich die ehemals schöne Werkausstellung auch nicht mehr so toll wie auch schon. Spätestens wenn man eine Abteilung für Influencerfotografie hat bin ich raus.

The Brutal Lifecycle of JavaScript Frameworks (

JavaScript UI frameworks and libraries work in cycles. Every six months or so, a new one pops up, claiming that it has revolutionized UI development. Thousands of developers adopt it into their new projects, blog posts are written, Stack Overflow questions are asked and answered, and then a newer (and even more revolutionary) framework pops up to usurp the throne.

Interesting Data on the rise and fall of JS Frameworks

DNSFS. Store your files in others DNS resolver caches (

[…] and I joked at the end that one could use this for file storage.

Well, I could not stop thinking about doing this. There are surely a lot of open DNS resolvers out on the internet, that are just asking to be used for storing random things in them. Think of it. Possibly tens of gigabytes of cache space that could be used!

After PingFS comes DnsFS!

GoPro quits the drone business (

GoPro has announced that it’s exiting the drone business, citing the challenges of turning a profit in an “extremely competitive” market.

Boom – GoPro is out of the Drone business. What initially was deemed to save the entire company just has been stopped.

Neilpang/ A pure Unix shell script implementing ACME client protocol (

An ACME Shell script:

Interesting an acme client in bash!

Dwitter ( is a challenge to see what awesomeness you can create when limited to only 140 characters of javascript and a canvas. Give it a go!

When the Demoscene goes Javascipt!

flowerhack | The Internet I Knew (

We… we had ad-free social networking in 2004. It was called “one of your friends got a Dreamhost and put some forum software on it and everyone hung out there.” If the website got really big and popular, maybe the owner would ask for donations from the users, and usually folks would give enough to keep the place afloat, because everyone wanted to keep hanging out there.

Einige erinnern sich noch ands dRB ;)

pretix/pretix (

Ticket shop application for conferences, festivals, concerts, tech events, shows, exhibitions, workshops, barcamps, etc.
Reinventing ticket presales, one ticket at a time.

Looks promising!


It’s 2018 and I still read blogs (yes via RSS) and listen to podcasts (also in high speed mode sometimes).

As I’m pretty picky when it comes to podcasts, I decided to sum up a short list of what I regularly listen to. First, the content should be interesting and I like good audio quality. I can not for the love of my life listen to stuff that sounds like it was recorded over a landline. Last but not least I don’t like ads ;)

Bonus points for show notes and Topicmarks which are incredibly helpful when listening to 4 hour podcasts.

Without further ado, let’s dive in.

FLOSS Weekly

Stumbled over FLOSS Weekly a while back and I like the content around Free Libre Open Source Software. Get started with the evolution of community.

99% Invisible

Wonderful Design Podcast around the invisible things of Design – Start with Guerilla Public Service Delux

ATP – Accidential Tech Podcast

The English version of Freakshow – I like to listen in to the thoughts and ramblings of Marco, Casey, and John.

Legacy code rocks

Legacy code is everywhere – This podcast deals with different topics around it and I suggest to start with the episode about Technical Wealth

How i built this

Guy Raz (also host of TED Radio Hour) dives into how people built companies or products. Best start with Yvon Chouinard talking about how he started Patagonia.

NPR – TED Radio Hour

Watching TED Talks is nice but having a few excerpts of Talks mixed with discussions with the speakers itself is a very nice mix.

Tim Ferris Show

I read a few books of Tim and also like his blog. Sometimes more serious topics, sometimes rapid Q/A’s with his Interview Partners.

CRE – Chaos Radio Extreme (German)

One of my favourites if you like to brush up your knowledge various topics ranging from IPv6 over Coffee to Chillies. Podcast can be up to 4 hours long but are worth every minute.

Freakshow (German)

The co-hosts around Tim discuss all new and fancy topics out of the tech scene. They run a show every other week and land usually on the 4 hour mark :) If that’s too much for you this podcast has fantastic show notes and great chapter marks so if you just want to listen in to a few parts it makes it very very easy.


#34C3 – Recap

them blinkenlights! –

Wow auf das war ich nun wirklich nicht vorbereitet. Und ja, das ist ein “ZOMG!IchBinZumErstenMalAmCongress”-Beitrag. Dei 4 (also eigentlich 5) Tage im CCC-Universum vergingen wie im Fluge, und wie Steini in Relativitätstheorie für blutige Anfänger sagte: “Zeit ist relativ”. Nebst den Talks gab es viel zu sehen, entdecken und diskutieren. Es war toll mal die Leute hinter den Projekten wie Tor und OONI direkt zu treffen und mit ihnen zu plaudern.

Die 6-2-1 Regel wurde Plusminus eingehalten – 6 Stunden schlaf, 2 Mahlzeiten und einmal Duschen pro 24 Stunden. Mate und Kaffee werden aus Gründen nicht quantifiziert.

Die Talks! – Hier mal ein paar der Talks, die ich sehr gut gefunden habe:

Opensource 👏

Vom ganzen A/V Stack das vom VOC betrieben wird Engelsystem über den Fahrplan bis hin zum management des Leerguts mittels c3bottles ist alles Opensource verfügbar! Find ich toll!