Wido, thanks for your feedback. On Thu, 2015-12-03 at 22:03 +0100, wido@xxxxxxxx wrote: > > > Op 3 dec. 2015 om 21:14 heeft Martin Millnert <martin@xxxxxxxxxxx> het volgende geschreven: > > > > Hi, > > > > we're deploying Ceph on Linux for multiple purposes. > > We want to build network isolation in our L3 DC network using VRF:s. <snip> > Why all the trouble and complexity? I personally always try to avoid > the two networks and run with one. Also in large L3 envs. > > I like the idea that one machine has one IP I have to monitor. > > I would rethink about what a cluster network really adds. Imho it only > adds complexity. There is one main reason behind separation, i.e. using cluster network: simple network level traffic classification. We have machines where we need to be able to guarantee a minimum amount of osd-osd replication traffic on the network links (CoS). And it seems like "nice-to-have" feature in general. An assumption here is that osd-osd "pinging" would happen on the cluster network if configured. A possible workaround I imagine would be if replication and osd-osd, osd-mon traffic would receive different values in the ToS field than client traffic. Not immediately obvious to me how one listening socket would manage the distinction. /Martin -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
