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FreeBSD unionfs deadlock

FreeBSD Jails provide isolated system containers that are perfect for CI testing. Miod ported OBuilder to FreeBSD back in 2023. I have been looking at some different approaches using unionfs.

17 Sep 2025

Marc Elvers

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Adventures with BuildKit

I’ve been doing battle the last few days with Docker, and in particular trying to persuade BuildKit to do what I wanted. I find Docker leans towards being a deployment tool, rather than a development tool which is to say that it’s exceedingly useful for both, but when I encounter problems trying to persuade it to do what I’m after for development, it tends to feel I’m not using it for the purpose for which it was intended.

29 Jul 2025

David Allsopp's Blog

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ZFS Send Streams

We often say that ZFS is an excellent replicated file system, but not the best local filesystem. This led me to think that if we run zfs send on one machine, we might want to write that out as a different filesystem. Is that even possible?

02 May 2025

Marc Elvers

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