[DRBD-user] DRBD castrates Linux-HAv2 3+ nodes per cluster mojo

paddy at panici.net paddy at panici.net
Mon Aug 20 14:48:15 CEST 2007

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

On Mon, Aug 20, 2007 at 02:44:39AM -0700, Joe Bill wrote:
> This is a real pain and a showstopper.
> When you have 3 or more nodes in a Linux-HA cluster,
> DRBD requires that drbd volumes be declared on ALL
> hosts, although DRBD prevents the user from declaring
> a DRBD volume on more than 2 nodes in that cluster,
> requesting the user to upgrade to DRBD+.
> Nevertheless, even though DRBD+ would allow you to
> define a DRBD volume on more than 2 nodes, it still
> doesn't fix the issue that all DRBD volumes in a HA
> cluster require to have a declaration entry on every
> node of that cluster.
> This hardly makes any sense in, say a 8 node cluster
> with 25 drbd volumes, because I don't want/need each
> of all 25 DRBD volumes to be declared and have it's
> own listener process on all 8 nodes of that cluster,
> thus having 8 copies of each drbd volume.
> What I need is, within the "Free DRBD" license terms,
> simply use Linux-HA multi-node capability to it's full
> extend, without having DRBD castrating Linux-HA's mojo
>  by restricting you to clusters with only 2 nodes.
> What I need is, withing the license terms of "Free
> DRBD", for DRBD to support drbd volumes configured on
> fewer nodes than the number of nodes in a Linux-HA
> cluster, enforcing for example the limit of 2 nodes
> per volume in "Free DRBD", but, allowing me to
> configure each drbd volume on *any* 2-node combination
> I choose, rather than on all nodes of the cluster.
> Thank you for your feedback.

suggest you actually read the license before you post this
kind of thing.


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