this post was submitted on 26 Sep 2023
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Linux
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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I found it hard to understand what this is. Overall summary, it's using new Linux kernel features to make Docker style containers way more efficient
It allows you to compose a bunch of filesystems into one layered stack of read only, at a mount point. It also shares memory between such filesystems and allows layers to be mounted in multiple places
For those familiar with how container images are built, this should make things a faster compared to the overlayfs techniques before. It also enables some kind of new hyper containerized software packages, but I'm not sure if that's a big deal. Something like how osx mounts a risk image for install or use
I sat in a meeting at work for 2 hours while experts on composefs explained what it is, how it works, and how it would benefit our product. This was coming from another team that already made the switch for their product.
I still have no fucking idea what it is.
Stacks have a performance hit, Docker is also introducing a bunch of experimental features to merge things and whatnot. I just don't get the entire logic tho.