Hey there! I’m a SRE, software developer, and system administrator, currently working as a Production Engineer/SRE at Facebook. I work as part of the Web Foundation team, responsible for the overall performance and reliability of Facebook’s user-facing products. I concieve, design, and improve systems that make Facebook more performant, scalable, and reliable.
Most of my active work is around operating system primitives, like cgroups, systemd, eBPF, containerisation, and a bunch of Facebook-internal technologies.
Recent blog posts
- The curious case of stalled squashfs reads
- In defence of swap: common misconceptions
- Adding power related targets to systemd
- cgroupv2: Linux’s new unified control group hierarchy
- Simulating service cold cache starts with eBPF/strace + oflag=nocache
More posts are available on the archive page.
Things on this site
- Assorted technology-related notes
- Sim racing data/notes
- My PGP public key
- My SSH public key
- My old TF2 configs
- RYM profile export
Profiles elsewhere
- GitHub
- Keybase
- last.fm
- suckless.org (my dwm patches are here)
- Unix and Linux Stack Exchange
Software
I maintain the following personal projects:
- aur — interface to the Arch User Repository
- clipmenu — a clipboard manager with a dmenu frontend
- gh-mirror — mirror all public repositories for a user to your local machine
- mac-cel — remove mouse acceleration on OSX
- nota — super simple daily logs with your $EDITOR + git
- mpdmenu — control mpd from dmenu
- pinyin — manipulate Hanyu Pinyin
- srt — a library to deal with SRT files
- travis-automerge — automatically merge successful builds from Travis CI
- tzupdate — update /etc/localtime automatically using geolocation
- xinput-toggle — tool to manipulate arbitrary xinput devices
- yturl — watch YouTube videos on the command line
I also am a contributor to some other projects, including:
- cgroup v2 — modern resource control and accounting
- systemd — a system and service manager for Linux
- hypothesis — an advanced Quickcheck style testing library for Python
- osquery — an operating system instrumentation framework for OS X and Linux
- the Pro Git book - a guide to Git and its internals
- pacaur - an AUR helper that minimises user interaction
- pass - the standard Unix password manager
- aurweb - the website powering the Arch User Repository
You can find other projects on my GitHub, although if they’re not on this list, I’m probably not actively developing or maintaining them.
Talks
- cgroupv2: Linux’s new unified resource hierarchy — FOSDEM/DevOpsDays/ASG
- Lessons learned running SSL at scale — FOSDEM
- The Web Foundation model — University College London lecture
- Bash pitfalls and code smells — LVL.UP Kuala Lumpur
- Pragmatic minimalism as a software design tool — LVL.UP Kuala Lumpur