On Thursday 21 June 2007 16:43, Joseph Mack NA3T wrote: > On Thu, 21 Jun 2007, Rio wrote: > > > i assume here you mean because there would be 2 copies of > > each mailbox with no control over which copy a user reads. > > yes > > > the mail server software (surgemail) has built-in 2-way > > mirroring that updates each other within milliseconds of a > > change.. > > This has always been a bit of a problem. I didn't know about > surgemail. I see it's not GPL/FOSS. I can't imagine it would > be too hard to add this to GPL mailservers. >
probably not, the biggest problem being that most gpl servers are multi-software to enable smtp/pop etc. so mirroring would have to be on several levels, or an additonal software addon... surgemail is integrated although can be separated in to individual smtp/pop with just ip addressing. it is somewhat expensive, but after seeing all the features it had i fell in love with it. the mirroring is done very smartly. been running it 3 yrs and never looked back. > >> You'll need two if you want failover. > > > > failovers of directors, but if, say, one director handles > > 2 ips for 2 identical services on 2 servers, if one server > > goes down does that not do auto-failover for the real > > server portion? > > there's too many "servers" in there. You can failover > one-by-one individual services running on the realservers > too if that's what you're asking. That is also handled by > external packages like mon, ldirectord and keepalived. > yes i would need to failover every guest vserver individually in addition to the host itself. there are dangers of an 'owner' trashing his colo virtual, or i may need to shut down one particular one for some reason. if i mean to shut it down for non-payment then i just have to do it twice :) otherwise i expect the other to pick up the slack till i bring it back up. this sounds like the area of study i need to be at. just have to learn the various configurations to figure out what is for us, but it looks like lvs is the way for us. thank you! > Joe > -- > Joseph Mack NA3T EME(B,D), FM05lw North Carolina > jmack (at) wm7d (dot) net - azimuthal equidistant map > generator at http://www.wm7d.net/azproj.shtml > Homepage http://www.austintek.com/ It's GNU/Linux! > > _______________________________________________ > LinuxVirtualServer.org mailing list - [email protected] > Send requests to [EMAIL PROTECTED] > or go to http://lists.graemef.net/mailman/listinfo/lvs-users > -- Rio _______________________________________________ LinuxVirtualServer.org mailing list - [email protected] Send requests to [EMAIL PROTECTED] or go to http://lists.graemef.net/mailman/listinfo/lvs-users
