On Thu, 29 Jul 2010 15:50:28 +0800, Wang Shaoyan wrote:
Hi. I want a subvolume in root to be compressed, I try to do this: # mkfs.btrfs /dev/sda8 # mount /dev/sda8 /home/usr/btrfs # cd /home/usr/btrfs # btrfs subvolume create mysubvolume # mount -o compress,subvol=mysubvolume /dev/sda8 some_dir_in_root but when I create a file in some_dir_in_root, the file isn't compressed at all. why? How can I specify some subvolumes to be compressed, and the others Not to be compressed in a single btrfs?
The method that you said is right, by this way, I can create a compressed file on the specified subvolume. I think your file has been compressed or is hard to be compressed, so you found it isn't compressed at all. Just like we use a zip tool to compress a compressed file, we will find the file isn't compressed at all. Thanks Miao
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