2011-03-28 14:24:03 +0100, Stephane Chazelas: > 2011-03-23 12:13:45 +0700, Fajar A. Nugraha: > > On Mon, Mar 21, 2011 at 11:24 PM, Stephane Chazelas > > <stephane.chaze...@gmail.com> wrote: > > > AFAICT, compression is enabled at mount time and would > > > only apply to newly created files. Is there a way to compress > > > files already in a btrfs filesystem? > > > > You need to select the files manually (not possible to select a > > directory), but yes, it's possible using "btrfs filesystem defragment > > -c" > [...] > > Thanks. However I find that for files that have snapshots, it > ends up increasing disk usage instead of reducing it (size of > the file + size of the compressed file, instead of size of the > file). > > If I do the btrfs fi de on both the volume and its snapshot, I > end up with some benefit only if the compression ratio is over > 2 (and with more snapshots, there's little chance of getting any > benefit at all). Also, with dozens of snapshots on a 4TB volume, > it's likely to take weeks to do. > > Is there a way around that? [...]
OK, sorry. I can see now that it's a FAQ. So the answer to my question would be "no"... -- Stephane -- 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