Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Reqding this (source http://lists.linbit.com/pipermail/drbd-user/2007-June/007062.html) : H.D. a écrit : > On 28.06.2007 15:03, prashant wrote: >> Does DRBD8.0 can mount secondary as read-write. > > It allows two primaries, yes. > >> If yes - is there additional steps to do before mounting a partition. > > Besides the two primaries option in the config, no. > > But be sure to use a cluster file system, such as OCFS or GFS. I thought about this : What if the DRBD resource is used as a LVM's Physical Volume (PV) with a Volume Group (VG) on top ? In my case, I am studying a solution for XEN's virtual machines storage. I'd like to have several Logical Volumes (LV) into the Volume Group (VG), one per virtual machine. 3 points here : (1) Let's take 2 virtual machines : VM1 and VM2. I want VM1 to run on server A and VM2 on server B. Each virtual machine have its own Logical Volume (2) I'd like to use drbd 8.0 in primary/primary configuration so I can run only one drbd resource for the VG which stores the 2 Logical Volumes (3) because of (1), the Logical Volumes are not concurrently accessed : one Logical Volume is only mounted in one node and will be replicated to the other So : Logical Volumes are not mounted on both nodes but the Physical Volume (PV)/Volume Group (VG) under the Logical Volumes is used on both nodes, at the same time. Question : does PV/VG can be accessed concurrently or do I have to use RedHat's Cluster LVM (clvm) ? -- Maxim Doucet sys admin @ la maison http://www.alamaison.fr