Re: [Qemu-devel] qemu-img problem when create a file larger than fs's size

2013-05-09 Thread yuxh
On 05/09/2013 03:44 PM, Stefan Hajnoczi wrote: On Wed, May 08, 2013 at 01:18:17PM +0800, yuxh wrote: I have to consult you a qemu-img's problem. Is this reasonable to create a file which is larger than the available size of the fs by qemu-img cmd ? When I use qemu-img create a file which is

Re: [Qemu-devel] qemu-img problem when create a file larger than fs's size

2013-05-09 Thread Stefan Hajnoczi
On Wed, May 08, 2013 at 01:18:17PM +0800, yuxh wrote: > I have to consult you a qemu-img's problem. > > Is this reasonable to create a file which is larger than the > available size of the fs by qemu-img cmd ? > > When I use qemu-img create a file which is larger than the available > size of the

Re: [Qemu-devel] qemu-img problem when create a file larger than fs's size

2013-05-08 Thread yuxh
On 05/08/2013 04:20 PM, Fam Zheng wrote: On Wed, 05/08 15:34, yuxh wrote: Thank you for your reply. I agreed what you said. And do you think we shall print a prompt to user when the size user specified is larger than available space ? Might be nice, but it's hard to define "available space"

Re: [Qemu-devel] qemu-img problem when create a file larger than fs's size

2013-05-08 Thread Fam Zheng
On Wed, 05/08 15:34, yuxh wrote: > > Thank you for your reply. I agreed what you said. > And do you think we shall print a prompt to user when the size user > specified is larger than available space ? Might be nice, but it's hard to define "available space", and "available space" at creating tim

Re: [Qemu-devel] qemu-img problem when create a file larger than fs's size

2013-05-08 Thread yuxh
Thank you for your reply. I agreed what you said. And do you think we shall print a prompt to user when the size user specified is larger than available space ? On 05/08/2013 02:36 PM, Fam Zheng wrote: I think it's the system admin to be responsible for the risk of over provisioning. We have

Re: [Qemu-devel] qemu-img problem when create a file larger than fs's size

2013-05-07 Thread Fam Zheng
I think it's the system admin to be responsible for the risk of over provisioning. We have host sparse file[1] (as your example) for preallocated image (for example, -f raw), as well as sparse image (as supported in qcow2, vmdk, etc.). There are cases that host file system is extended or the vm dis

[Qemu-devel] qemu-img problem when create a file larger than fs's size

2013-05-07 Thread yuxh
Hello all, I have to consult you a qemu-img's problem. Is this reasonable to create a file which is larger than the available size of the fs by qemu-img cmd ? When I use qemu-img create a file which is larger than the available size of the fs, the creation is completed succesfully. However