I would like to use btrfs as soon as possible because end of the year a new machine is needed but: * existing LVMs with ext4 must be supported in future * RAID10 support for the whole os is needed (4 x 2TB) Am 02.03.2011 19:49, schrieb Josef Bacik: > On Wed, Mar 2, 2011 at 9:23 AM, Richard W.M. Jones <rjones@xxxxxxxxxx> wrote: >> On Tue, Feb 22, 2011 at 02:51:50PM -0500, Josef Bacik wrote: >>> 2) Fedora 16 ships without LVM as the volume manager and instead use >>> BTRFS's built in volume management, again just for the default. >> >> Sorry I'm a bit late on this gentle discussion, but I have one >> question about this: >> >> I use LVM to store virtual machines, one VM per LV, and it's very good >> for that. >> >> How is BTRFS's performance when used to store VMs (presumably they are >> stored as files)? >> > > Good, but the problem is the default behavior of virt manager is to > use fsync for everything, you have to manually go in and set the > "Cache" to "None" so it will use O_DIRECT, and then it's just as fast > as anything else. Not a big deal if you create everything via the > command line, kind of annoying if you do it via the GUI, tho all you > have to do is say "let me edit the options before starting this vm" > when you first create it, set the cache type and then do the install > and you are good to go. Thanks,
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