On Fri, 28 Dec 2012, Chris Murphy <lists@xxxxxxxxxxxxxxxxx> wrote: > On Dec 27, 2012, at 12:27 PM, Gene Czarcinski <gene@xxxxxxxxx> wrote: > > Oh thanks for that little reminder that you can put btrfs on an LV. > > I find it's more trouble than it's worth. It doesn't bring much to the > table. I've tried using LVM and BTRFS together. While they work the combination doesn't seem to offer much benefit. LVM is good for snapshots (which BTRFS does better) and also for dividing a device that is larger than your filesystem can properly support (also not a problem for BTRFS). http://etbe.coker.com.au/2012/12/17/using-btrfs/ At the above URL I've documented some of the things I'm currently doing with BTRFS in production. I'm still considering what's the best way of managing virtual machines. My current method is to run a server with two disks that have separate LVM VGs and give each VM a pair of block devices to run BTRFS RAID-1. The other option I'm considering is a single BTRFS RAID-1 taking all disk space and giving each VM a single block device that's a file on the BTRFS filesystem. Presumably that will give a significant performance hit because of double filesystem overhead but will make management a little easier and possibly reduce seeks when multiple VMs are writing to disk. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/ -- 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
