> 1- While a VM is running with LVM on top of DRBD, the replicate storages be > in secondary mode, ie, only to have a primary storage for each VM that is > running (that always was the recommendation of LINBIT for security reasons).
The concept with DRBD9 is a bit different, i.e. we will not use LVM on top of DRBD. Instead, DRBD uses LVM internally, and we use 'drbdmanage' to configure it. The new auto-promote feature make sure the resource is always active on only one host. > 2- And when i apply a live migration of a VM, the DRBD plugin first see if > the replicated storage is perfectly synchronized (in terms of drbd "oos" > that mean: "out of sync"), and if really are perfectly synchronized, the > plugin converts the secondary storage in primary for after apply the live > migration, and after of a live migration successfully, finally convert the > old primary storage in secondary. Of this mode, always we have a primary > storage in execution for each VM. The new architecture will avoid those problem, because we do not use primary-primary mode. _______________________________________________ pve-devel mailing list pve-devel@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel