Fantastic review! Thank you so much for this: very clear, very thorough, it scattered all remaining confusions! I thumb up for a blog post! :D
While I had understood most of it, I was completely ignorant of the separation between the .drv closure and the output closure. It all makes much more sense now. I think the documentation of `--gc-keep-outputs` ought to be updated. > I don't use emacs-guix, so I can't comment on it, I'm afraid. Maybe > someday I'll get around to using it, and then I can say something > useful! I find emacs-guix tremendously useful, I highly recommend you give it a try (the learning curve is very flat). Any reason why you'd rather not use it? > > While I'm at it, I'd like to note that something might be wrong with the > > `-F` option: I never get the promised amount of free space back, only > > about 2/3 of it. > > I think that's normal. My understanding is that if you say "guix gc -F > 3GiB", you aren't asking Guix to free 3 GiB; you're asking Guix to try > to free enough space so that when it's done, the store will have 3 GiB > of free space. For example, if the store begins with 2 GiB of free > space and there is 5 GiB of garbage, Guix will only collect 1 GiB in > order to bring the free space up to 3 GiB. No, I'm talking total disk usage here. If I ask 5G back, then `df /` tells me that root has about 3-4G free, it never has the promised amount. Can someone confirm this? Might be a bug. -- Pierre Neidhardt
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