This has got to the stage where I'd be grateful for any testing other people can do, though obviously don't endanger a production system! You should be able to run the DLM and GFS on this, see https://www.redhat.com/archives/linux-cluster/2005-September/msg00177.html for (very) brief instructions. There is a new clvm patch available in the cluster CVS at cman/lib/clvmd-libcman.diff Here's a list of the user-visible changes, please feel free to ask questions on the list. good ---- - (optional) encryption & authentication of communications - Multiple interface support (unfinished, needs AIS and cman work) - Automatic re-reading of CCS if a new node joins with an updated config file bad --- - Always uses CCS (cman_tool join -X removed)* - Compulsory static node IDs (easily enforced by GUI or command-line) - Can't have multiple clusters using the same port number unless they use a different encryption key. Currently cluster name is ignored.** - Hard limit to size of cluster (set at compile time to 32 currently)*** neutral ------- - Always uses multicast (no broadcast). A default multicast address is supplied if none is given - libcman is the only API ( a compatible libcman is available for the kernel version) - Simplified CCS schema, but will read old one if it has nodeids in it.**** internal -------- - Usable messaging API - Robust membership algorithm - Community involvement, multiple developers. * I very much doubt that anyone will notice apart from maybe Dave & me ** Could fix this in AIS, but I'm not sure the patch would be popular upstream. It's much more efficient to run them on different ports or multicast addresses anyway. Incidentally: DON'T run an encrypted and a non-encrypted cluster on the same port & multicast address (not that you would!) - the non-encrypted ones will crash. *** I doubt that the old cman worked well above 30 nodes anyway. I intend to do some AIS hacking to improve this situation by drastically reducing the network packet size. **** The main difference here is that the multicast address need only be specified once, in the <cman> section of cluster.conf. The interface used will be the one that is bound to the hostname mentioned. patrick -- patrick -- Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
