[HECnet] "Mixed" clustering

Most VAXen used to run cluster traffic through a 10Mbit/s Ethernet interface and with tens to hundreds of users. Shouldn't be a bottleneck. Two scenarios when there is heavy traffic on the cluster interconnect are first when you do a disk shadow copy and second when you boot a satellite over the Ethernet. Kari Sampsa Laine wrote: Yeah, you guys are right - mind you, the FDDI stuff would've been sort of fun to play with, maybe later. How much bandwidth can I expect a cluster to use (I know this depends on the use of it of course, but assuming a fairly light load, no crazy 2000 user apps and DB)? Is a 100 mbps NIC enough? Sampsa On 29 Sep 2009, at 20:50, Kari Uusim ki wrote: Why don't you leave TCP/IP as it is now? You don't have to dedicate the Ethernet just to cluster traffic (that is a feature of those inferior creations which some people call [*nix] clusters - even if they aren't). You can run any traffic on the same Ethernet interface as cluster traffic. You just have to remember if you connect the machines with a Ethernet switch that there mustn't be protocol or MAC filtering which interferes with the cluster traffic. DECnet routing has nothing to do with TCP/IP routing. They are completely separate protocols and live their own life in a VMS machine. I suggest you run everything on the Ethernet and forget about the FDDI. Kari Sampsa Laine wrote: I've come up with an alternative solution: I'll use ethernet for the cluster interconnect as I have ethernet ports on all the machines. However, this leaves CHIMPY without an ethernet-based TCP/IP connection. So my question is this: Can I hook up two machines (running VMS) with FDDI and have the second machine route packets onto the ethernet segment for me? This wasn't immediately clear from the documentation. I assume if the second machine is set up as a L1 router DECNET over this setup will be possible? Sampsa On 29 Sep 2009, at 19:50, Kari Uusim ki wrote: Sampsa Laine wrote: Is it possible to run a cluster over both ethernet and FDDI? Basically, I'd like to connect Machine A -> B using ethernet and B -> C using FDDI - is this possible? Sampsa . Unfortunately that configuration violates the rule of full connectivity. All cluster members must have direct connectivity to other members. But if you add a FDDI-Ethernet-bridge, you should get a "legal" configuration. Kari . .