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 systems, like cgroups, systemd, eBPF, the Linux kernel, 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
- Old game miscellania
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
- mack — an opinionated, fast music organiser
- 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:
- aurweb — the website powering the Arch User Repository
- cgroup v2 — modern resource control and accounting
- hypothesis — an advanced Quickcheck style testing library for Python
- osquery — an OS instrumentation, monitoring, and analysis framework
- pacaur — an AUR helper that minimises user interaction
- pass — the standard Unix password manager
- systemd — a system and service manager for Linux
- taglib-rust — Rust FFI bindings for taglib
- the Pro Git book — a guide to Git and its internals
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