On Tue, Oct 30, 2012 at 5:47 AM, ching <lschin...@gmail.com> wrote: > Hi all, > > I try to defrag my btrfs root partition (run by root privilege) > > find / -type f -o -type d -print0 | xargs --null --no-run-if-empty btrfs > filesystem defragment -t $((32*1024*1024)) > > > 1. This kind of error messages is prompted: > > failed to open /bin/bash > open:: Text file busy > total 1 failures > failed to open /lib64/ld-2.15.so > open:: Text file busy > total 1 failures > failed to open /sbin/agetty > open:: Text file busy > failed to open /sbin/btrfs > open:: Text file busy > failed to open /sbin/dhclient > open:: Text file busy > failed to open /sbin/init > open:: Text file busy > failed to open /sbin/udevd > > It seems that locked files cannot be defragged, is it expected behaviour?
I can't reproduce that behaviour here, although maybe you're running an older kernel with some bug that's since been fixed? > 2. Btrfs Wiki mentions that defrag directory will defrag metadata, is > symlink/hardlink considered as metadata? > > P.S. inline data is already disabled by "max_inline=0" Well, that's a silly thing to do, causing every small file to take up a separate 4kb block rather than its size * 2, and requiring extra seeks to read/write them (i.e., if you have a million 10 byte files, they'll now take up 4GB instead of 20MB). > 3. Is any possible to online defrag a btrfs partition without hindered by > mount point/polyinstantied directories? If you're asking if you can defrag an unmounted btrfs, not at this time. It's possible in principle, nobody has cared enough to implement it yet. -- 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
