On Wed, 2003-10-08 at 18:06, Rafael 'Dido' Sevilla wrote: > Yes, this is a high-availability cluster, in active-passive mode. Yes, > you need to have exactly the same data on both servers, either using > some form of synchronization (a very difficult task, especially if the > data changes often) or use of network attached storage or a storage > attached network (very expensive solution, and probably only appropriate > for high-end database apps). > > What application are you interested in?
I also think this aspect of the system will be the bulk of my problem come implementation time. The servers will provide http and maybe https services with a postgresql database-- the usual content management stuff. I expect the developers to be modifying the code often, so it's essential to sync the code files and databases (I don't have to sync the logfiles in realtime, do I?). Although it would help if server B would update binaries and config files too everytime I update or recompile from server A. Anyway, I guess the syncing thing is incremental. I'm now looking at CODA and rsync. I'm not sure yet if these are what I really need. > If all you want to do is go active/passive, use Linux-HA heartbeat and > run Apache simultaneously on both servers--all of the time, and ensure > their configurations are perfectly identical. The only thing in your > resource group is the cluster IP address you want your clients to be > using. If one server goes down, the IP address gets taken over, back > and forth. Ah yes, I'm looking at it now... I think this is enough! I also stumbled upon FAKE which does the IP add takeover. Or is it that Heartbeat natively uses FAKE? Thanks a lot! -- Joon ===================== For every mad scientist who's had a convenient thunderstorm just on the night his Great Work is finished and lying on the slab, there have been dozens who've sat around aimlessly under the peaceful stars while Igor clocks up the overtime. "Good Omens", Neil Gaiman and Terry Pratchett -- Philippine Linux Users' Group (PLUG) Mailing List [EMAIL PROTECTED] (#PLUG @ irc.free.net.ph) Official Website: http://plug.linux.org.ph Searchable Archives: http://marc.free.net.ph . To leave, go to http://lists.q-linux.com/mailman/listinfo/plug . Are you a Linux newbie? To join the newbie list, go to http://lists.q-linux.com/mailman/listinfo/ph-linux-newbie
