On Wed, 2014-04-23 at 21:06 +0200, Kai Krakow wrote: > Пламен Петров <plamen@xxxxxxxxxxxxxxxxxx> schrieb: > > I'm going with the module suggestion from Marc, too. > > > /dev/sda2 / btrfs relatime,compress=zlib 0 0 > > This line looks kinda useless to me. The compress=zlib option won't be > applied at boot and cannot be changed at runtime because AFAIR btrfs does > not allow that yet. ... My understanding is that the compress= option on btrfs *can* be changed at run time. After remounting with a compress= option, later writes will be done using the newly selected algorithm. The compress= option is filesystem-wide, you cannot currently use different compress= options for different subvolumes. Mounting a subvolume with a different compress= option will change the compression algorithm for all mounted subvolumes on that filesystem. (Note that I wouldn't recommend zlib on most systems as a / filesystem - it's slow to decompress compared to lzo, so it will cause slower boots if your disk is reasonably fast.) -- Calvin Walton <calvin.walton@xxxxxxxxxx> -- 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
