WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-users

Re: [Xen-users] How to query the used space of a domU


On Dec 17, 2007, at 21:01 , Dominique H. Schramm wrote:

Hi folks,

i use xen 3.1.0 from sources with debian eth. the space for
the domU is a lvm volume.

now i have a problem:

how can i query the used space of a domU without logging
into the domU ? with xm i didn't find out an option how to
query this.

This information is not available to the hypervisor, it has no knowledge of the filesystem used by the domU. If the filesystem is ext2/ext3, you could query the logical volume in a read-only fashion, for instance by using something like "debugfs /dev/volgroup/volume -R stats | grep 'Free blocks'". I'm not an ext3 export to know for sure if this is advisable (funny in-between states of the filesystem while the guest is writing might emit nasal daemons if accessed by debugfs concurrently).

Generally speaking people leave this kind of monitoring to services like SNMP running on the guest.

Cheers,
Pim


_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users

<Prev in Thread] Current Thread [Next in Thread>
  • Re: [Xen-users] How to query the used space of a domU, Pim van Riezen <=