On Sat, 26 Nov 2011 08:44:28 -0500 Rich Freeman <ri...@gentoo.org> wrote:
> Oh, on the topic of btrfs, if any emerge operations do file copies, > adding --reflink=auto to the cp command will GREATLY improve > performance. That does a copy-on-write copy - it behaves like a > hard-link as far as time to create goes, but it behaves like a full > copy as far as modifications not being shared goes. [...] We don't rely on external tools to do the copying. AFAIR it uses Python's shutil module which is rather poor. I'm slowly working on creating atomic-install tool for merging this more optimally [1]. But in this particular case, I don't think COW is particularly useful. If it works only on filesystem bounds, we could move the file directly anyway. [1]:https://github.com/mgorny/atomic-install -- Best regards, Michał Górny
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