Hi Everyone, I am thinking about deploying Xen on one of our servers. Just wanted to ask if using disk images for the guest operating sysmtems (over LVM partions) is good enough. Does this effect disk/memory access/usage in anyway? Thanks _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Mon, Aug 14, 2006 at 05:39:21PM +1000, Devraj Mukherjee wrote:> I am thinking about deploying Xen on one of our servers. Just wanted > to ask if using disk images for the guest operating sysmtems (over LVM > partions) is good enough. Does this effect disk/memory access/usage in > anyway?It slows down disk accesses by quite a bit, as the dom0 has to go through a whole extra layer (the dom0 VFS layer) to get to your data. *Definitely* not a good thing for production. Didn''t someone post some LVM vs disk image performance stats to either here or xen-devel@ a while ago, or am I hallucinating? (I''m on the train, so no google to confirm my suspicions). - Matt _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Alan Murrell
2006-Aug-15 14:56 UTC
Re: [Xen-users] Re: Disk images for server environment?
On Monday 14 August 2006 01:13, Matthew Palmer wrote:> It slows down disk accesses by quite a bit, as the dom0 has to go through a > whole extra layer (the dom0 VFS layer) to get to your data. *Definitely* > not a good thing for production.I agree with this. Having a base install of a server (or several different types of servers) in disk images is good, however, as it makes them more portable. You could then just mount the disk image on a loopback and copy it over to the LVM-backed DomU; that''s what I do here, and it works *great*. -Alan _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users