On Wed, Nov 09, 2011 at 03:04:01PM +0700, Fajar A. Nugraha wrote: > On Wed, Nov 9, 2011 at 2:48 PM, Lubos Kolouch <lubos.kolouch@xxxxxxxxx> wrote: > > Sorry for possibly OT question - when I have historical btrfs system > > mounted with zlib compression, > > > > can I remount it with lzo ? > > yes > > > What will happen? Will the COW be broken > > and the files taking duplicate space? Or will the Universe explode and > > be replaced with something even more bizzare? > > New written block/extents will use lzo compression (if it's > compressible, or if it's mounted with compress-force). Old, unmodified > block/extents will remain unchanged, using zlib or uncompressed. This is correct, your old stuff will be zlib and your new stuff lzo. The compression type is recorded on a per-extent basis and the global switch just decides what type of compression to use for new writes. -chris -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
