On Tue, May 19, 2015 at 11:00 AM, Peter Humphrey <pe...@prh.myzen.co.uk> wrote: > On Tuesday 19 May 2015 10:53:26 Rich Freeman wrote: >> On Tue, May 19, 2015 at 10:44 AM, Peter Humphrey <pe...@prh.myzen.co.uk> > 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. > > Ah, well that's quite different from my Atom box with its 64GB SSD; before I > remove the -v a few weeks ago it was reporting many megabytes trimmed most > times it ran. That's on ext4 and running Gentoo with http-replicator service. >
So, I was inspired to look into this yet again. Looks like it is the subject of this: https://www.mail-archive.com/linux-btrfs@vger.kernel.org/msg40618.html It doesn't look like this is in 3.18 yet. So, I'm basically running without trimming. -- Rich
