On Sun, Sep 21, 2014 at 08:34:33AM +0000, Duncan wrote: > Russell Coker posted on Sun, 21 Sep 2014 12:09:11 +1000 as excerpted: > > > We need to have a way to determine the progress of a device delete > > operation. > > Also for a balance of a RAID-1 that has more than 2 devices it would be > > good to know how much space is used on each device. > > > > Could btrfs fi df be extended to show information separately for each > > device? > > btrfs fi show should give you at least some minimal per-device stats, > today. Enough to at least have some idea of the progress of a balance > when adding/removing devices.
Up to now this is the only way to see the progress. > Longer term, there has been discussion of extending/changing the fi df > format and making it far more verbose, including the information found in > btrfs fi show as well, and making everything potentially per-device. I > hadn't paid a whole lot of attention to the details, however. > > Alternatively, leave df more or less as it is (perhaps extending it a bit > but attempting not to kill existing scripts using it) and put the detail > in a new btrfs filesystem usage. This sounds rather more reasonable to > me. > > Either way the idea is to give people a single command that combines the > current output of fi show and fi df, ideally displaying per-device and > filesystem totals both, in enough verbosity to avoid the unintuitive and > arcane btrfs specific knowledge required today to interpret it. > > I had originally presumed that such a change would happen before the > experimental labels came off, but it didn't. I don't know the timetable > for it now, or even if it's still planned, as IIRC the discussion died > away back in the btrfs-progs 3.12 era and I expected to see it in 3.14 > and it wasn't there, so I don't know... The upcomming 3.17 release should contain all the 'new df' patches that were unfortunatelly delayed. There are some minor issues to be fixed but I hope it'll be ready close to the kernel 3.17 release. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
