On 10/03/2011 06:33 PM, Eric Sandeen wrote:
On 10/3/11 5:13 PM, Richard W.M. Jones wrote:
> On Mon, Oct 03, 2011 at 04:11:28PM -0500, Eric Sandeen wrote:
>> testing something more real-world (20T ... 500T?) might still be interesting.
>
> Here's my test script:
>
> qemu-img create -f qcow2 test1.img 500T&& \
> guestfish -a test1.img \
> memsize 4096 : run : \
> part-disk /dev/vda gpt : mkfs ext4 /dev/vda1
...
>
> At 100T it doesn't run out of memory, but the man behind the curtain
> starts to show. The underlying qcow2 file grows to several gigs and I
> had to kill it. I need to play with the lazy init features of ext4.
>
> Rich.
>
Bleah. Care to use xfs? ;)
WHy not btrfs? I am testing a 24TB physical server and ext4 creation
took forever while btrfs was almost instant. I understand it's still
experimental (I hear storing virtual disk images on btrfs still has
unresolved performance problems) but vm disk storage should be fine.
FWIW I have been using btrfs as my /home at home for some time now;
so far so good.