On Mon, 2011-05-09 at 15:40 -0600, allan wrote: > Hi Steve, > > I've had mixed results doing that very thing. Two servers perform very differently. > One mach, an HP DL380G6 w/ dual quad core Zeon and 6 146G disks installed with CentOS 5.5 stock xen, lvm, etc. performs > very well. It may be more related to the write cache ratio of your smartarray on the DL38O, no ? > Another machine intended as a low class server, a desktop quad core AMD, 4 SATA disks installed with stock > CentOS 5.5 same as first mach, has issues with disk perfomance on every DomU - writes are 1/10 the rate of Dom0 -- I'm > still troubleshooting it. > I see no problem with using LVM on Dom0, carving it up and offering to DomU virtuals and the virtuals using LVM for > storage. One thing to avoid: do not duplicate an LVM names within the entire machine. i.e. installer, when told to use > LVM, will create a vg of a specific name. If this name is not overridden, and you create multiple DomUs with same > process the VG name will be duplicated (as well as the LV names). Avoid name duplication. > I hope this helps. All the VM's I've been using (ESX, KVM, Xen, and also HyperV) are built on LVM and no particular issue nor performance problem > > Allan > > Steve Shorter wrote: > > Howdy! > > > > I am setting up virtual guests to have a LVM created > > from the host. It would be good to use LVM's in the > > guest also.. for easy volume expansion etc... > > > > ie. I am creating pv's/vg's/lvms on top of LVM's. It *seems* to > > work but some of the userland tools need the option -ff > > > > Does anybody see any issues doing this? > > > > thanx - steve > > > > _______________________________________________ > > linux-lvm mailing list > > linux-lvm@redhat.com > > https://www.redhat.com/mailman/listinfo/linux-lvm > > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ > > > > > > _______________________________________________ > linux-lvm mailing list > linux-lvm@redhat.com > https://www.redhat.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
