[Linux-cluster] Can two clusters have same name?
chattygk at gmail.com
Mon Mar 16 08:47:47 UTC 2009
True. Anyways. Thanks for your help.
On Mon, Mar 16, 2009 at 2:07 PM, Chrissie Caulfield <ccaulfie at redhat.com>wrote:
> Chaitanya Kulkarni wrote:
> > Thanks for your reply Chrissie.
> > But is this, i.e. deployment of clusters with same name, a valid
> > scenario? How often (as in say 1 in a 100) may I see such deployments,
> > if at all?
> Sorry, I really have no idea how many times you might see such
> deployments. How would I work it out?! Cluster names are chosen by the
> administrators ... those people are not easily predictable ;-)
> > On Mon, Mar 16, 2009 at 1:28 PM, Chrissie Caulfield <ccaulfie at redhat.com
> > <mailto:ccaulfie at redhat.com>> wrote:
> > Chaitanya Kulkarni wrote:
> > > Hi All,
> > >
> > > What happens if in the same network, we try to create two clusters
> > with
> > > the same name?
> > >
> > > Does it cause any problem?
> > YES LOTS!
> > At best the two clusters will merge into one, at worst you will get
> > evictions because of clashes between node IDs
> > Actually you *can* do this if you change the cluster_id/multicast
> > address or port number in cluster.conf. But need to be careful and it
> > not recommended.
> > The main reason I say not to do this is that GFS volumes have the
> > cluster name embedded in the super block. If you have two clusters
> > the same cluster name on the same SAN then it's going to be very easy
> > totally corrupt the GFS filesystem by mounting it on two different
> > clusters.
> > Chrissie
> Linux-cluster mailing list
> Linux-cluster at redhat.com
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Linux-cluster