Am Tue, 19 May 2015 10:53:26 -0400 schrieb Rich Freeman : > On Tue, May 19, 2015 at 10:44 AM, Peter Humphrey wrote: > > > > Incidentally, what's the received wisdom on frequency of file-system trimming > > on SSDs these days? I've seen values quoted between twice a day and once a > > week. And how does trimming affect btrfs? > > > > I've been trimming mine daily, and I've yet to be able to distinguish > it from a no-op. As far as I can tell fstrim -v always outputs 0 > bytes trimmed. (Note that I'm also a btrfs user.) I've been using the systemd timer that comes with util-linux upstream without modification, which runs fstrim weekly. That seems to work well, but to be quite honest, I wouldn't know how to tell. Sometimes I wasn't even sure it ran, so I would run it manually, and it always finished nigh-instantaneously. Before that, I used the discard mount option, but apparently that's only a good idea with high-end SSDs (not that I noticed much of a difference in everyday usage). -- Marc Joliet -- "People who think they know everything really annoy those of us who know we don't" - Bjarne Stroustrup