Re: Qcow2 preallocation + backing file

2012-09-03 Thread Stefan Hajnoczi
On Mon, Jul 30, 2012 at 9:10 PM, Mark Moseley moseleym...@gmail.com wrote: While I might've answered my own question, I'm no fio expert. I don't necessarily trust that I'm testing it correctly, which is why I'm asking here. Running the same test multiple times gives me 30-40meg/sec for both

Re: Qcow2 preallocation + backing file

2012-08-31 Thread Mark Moseley
On Mon, Jul 30, 2012 at 1:10 PM, Mark Moseley moseleym...@gmail.com wrote: I've been searching around trying to figure out if there's any benefit to having a qcow2 backing file created with preallocation=metadata set. That is, if there's any benefit to using a qcow2 file that is based on a

Qcow2 preallocation + backing file

2012-07-30 Thread Mark Moseley
I've been searching around trying to figure out if there's any benefit to having a qcow2 backing file created with preallocation=metadata set. That is, if there's any benefit to using a qcow2 file that is based on a qcow2 backing file with preallocation=metadata turned on. I know you can't turn on