Hi, i have a bit experience in LVM, but not in cLVM. So i have some principal questions: My idea is to establish a HA-Cluster with two nodes. The ressources which are managed by the cluster are virtual machines (KVM). I have a FC SAN, where the vm's will reside. I want to create vdisks in my SAN which are integrated as a PV in both hosts. On top of the PV's i will create a VG, and finally LV's. For each VM one LV. How are things going with cLVM ? Do i have to create PV ==> VG ==> LV seperately ? Or does cLVM replicate the information from one host to the other ? So that i have to create PV, VG and LV only once on the first node and this configuration is replicated to the second host. What is about e.g. resizing a LV ? Is this replicated, or do i have to resize twice, on each host ? E.g. one host is running VM3 in the corresponding lv3 on the first host. Is the second host able to access lv3 simultaneously or is there a kind of locking ? Is it possible to run some vm's on the first host and others on the second (as a kind of load-balancing) ? Is it possible to perform a live-migration from one host to the other in this scenario ? I will not install a filesystem in the lv's, because i got recommendations to run the vm's in bare partitions, this would be faster. Thanks for any eye-opening answer. Bernd -- Bernd Lentes Systemadministration Institut für Entwicklungsgenetik HelmholtzZentrum münchen bernd.lentes@helmholtz-muenchen.de phone: +49 89 3187 1241 fax: +49 89 3187 3826 http://www.helmholtz-muenchen.de/idg Es gibt nur eines, was auf Dauer teuerer ist, als in die Bildung zu investieren: Nicht in die Bildung zu investieren John F. Kennedy Helmholtz Zentrum München Deutsches Forschungszentrum für Gesundheit und Umwelt (GmbH) Ingolstädter Landstr. 1 85764 Neuherberg www.helmholtz-muenchen.de Aufsichtsratsvorsitzende: MinDir´in Bärbel Brumme-Bothe Geschäftsführer: Prof. Dr. Günther Wess und Dr. Nikolaus Blum Registergericht: Amtsgericht München HRB 6466 USt-IdNr: DE 129521671 _______________________________________________ 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/
