okay, I figured something out: if i mount file based btrfs - dd if=/dev/zero of=/mnt/btrfs.img bs=1024 count=20000000 && cd /mnt && mkfs.btrfs btrfs.img -like so: mount btrfs.img /btrfs -o compress=lzo,loop=/dev/loop0 compressing changes from a 11:1 to about 11:6 from the nfs client, any kernel! my testing was originally using loop0 and file based filesystem (if this make sense?) gary On Wed, Jul 31, 2013 at 11:13 AM, Gary Artim <gartim@xxxxxxxxx> wrote: > question: why does my compression rate change based on the *clients* > kernel (i think)? > > situation: testing using btrfs with lzo, when I run with equal kernels > on the server and client I get the same compression (on a 11GB:1.2GB). > When I run on a client with a 2.6.x kernel I get (11GB:6GB), same > file, all nfs4. btw, I dont get the same speed, 11GB file, server to > server, 16secs on btrfs/lzo; 11GB file, client to server 2mins on > btrfs/lzo over NFS. > > has anyone tried or can explain? > > server: 3.9.9-201.fc18.x86_64 > client (in question): 2.6.31.6-2.caos > client (get same compression): 3.9.9-201.fc18.x86_64 or 3.9.9-302.fc19.x86_64 > > thanks for any enlightening thoughts! -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
