Ah node vs node. Ignore my previous message which makes no sense. I read as node = instance. Thanks Paresh 416-688-1003 On Thu, Dec 26, 2013 at 2:52 PM, D'Hooge Freek <Freek.DHooge@xxxxxxxxx>wrote: > David, > > You will at least need to make the ASM diskgroup holding the voting / ocr > files visible on the new nodes as well. > I have never tested what happens if not all ASM diskgroups are visible on > all nodes, but I would expect to see some errors when creating / mounting > new disk groups. > > What would be the reason to not have all involved luns visible on all rac > nodes? > In my opinion, it would make it easier and flexible to have all asm luns > visible on all nodes. > > I don't understand what you mean with master node? > If you want to dedicate one (or more nodes) for a application or database, > you can use db services. In the service configuration you can mark some > instances as preferred and other as available. > There is also no requirement to create an instance on each of the nodes. > You could for example have the following setup: > > Database A, used by application X has instances on nodes 1,2 and 3. > The db service used by application X has the instances on nodes 1 and 2 as > preferred and on instance 3 as available (standby so to speak). > Dabase B, used by application Y and Z has instances on nodes 3, 4 and 5. > The db service used by application Y has the instances on nodes 3 and 4 as > preferred and on instance 5 as available, while the db service used by > application Z has nodes 4 and 5 as preferred an node 3 as available. > > As you can see, you can play an puzzle with this as much as you want. > > Kind regards, > > -- > Freek D'Hooge > Uptime > Oracle Database Administrator > email: freek.dhooge@xxxxxxxxx > tel +32(03) 451 23 82 > http://www.uptime.be > > > > > On do, 2013-12-26 at 13:22 -0600, David Barbour wrote: > > Merry Christmas (to those of you who celebrate), Happy Holidays (to those > who may not but have something going on - including New Year's), and Good > Afternoon: > > > We are currently running a 3-node RAC on RHEL 6.3(version > 2.6.32-279.22.1.el6.x86_64), Oracle 11.2.0.3.0 on ASM. Storage is > fibre-connected EMC VMAX. Cluster cache communication is handled via > Infiband. We are adding a new application and two nodes. The question > arises with the storage. We're putting the new application on a Dell > Compellent SAN. Also fibre connected. The plan is to make the 2 new nodes > the primary nodes for this application, and make node 3 of the current > cluster the fail-over. > > > Can anyone who has used multiple different SANs before provide any > hints/tips/tricks/pitfalls? > > > Will we have to serve the current EMC Storage to the new nodes? I don't > see why as we're not expanding the number of instances of the currently > running application. But we will have to zone the new storage to connect > to the third node of the current cluster. Any thoughts on how to install > this new application? I don't really want instances of it on Nodes 1 & 2 > at all. If I make Node 3 the master node and install from there, I should > be able to pick Nodes 4 & 5 on which to create the other new instances. > > > Any thoughts? > >