On Sun, Nov 18, 2012 at 09:27:41AM -0700, Shawn Heisey wrote: > Having half the drives on BTRFS was my primary reason for Fedora. OK, I understand. You could perhaps look at what the kernel in ubuntu 12.04 LTS is like. (Note: kernels 3.2.0-30 to -33 have a serious problem with hotswap locking up the kernel; the patch to fix this should be in the -34 release) > Upgrading every 6 months sounds like a royal pain, so perhaps I > won't do Fedora/BTRFS. Do you happen to know if it will be possible > to upgrade from CentOS 6 to CentOS 7? The lack of an upgrade path > from 5 to 6 has been a major headache. Sorry I don't; I wasn't even aware that 5 to 6 upgrade was not possible. However the release schedules of RedHat are such that you're likely to sit on either 6 or 7 forever. With a replicated system you could at least shut down one node, reinstall it from scratch, reinstall the same version of glusterfs, and re-introduce it to the cluster.