I've just read two interesting articles: http://www.howtoforge.com/installin...tabase-servers-on-debian-5.0-with-ispconfig-3 http://www.howtoforge.com/installin...tabase-cluster-on-debian-5.0-with-ispconfig-3 1. Could somebody explain me how does it work? Programs? 2. Do data (www files, mail messages) write on both connected in this way servers? 3. What about database replication? 4. What will happen if one of servers suddenly shut down? Do other servers take care about all traffic? Several weeks ago I installed Debian with MyDNS-NG and MyDNSConfig. I made database replication of DNS tables from primary server so it become secondary DNS server. I also decide to install Postfix in relay / backup / secondary mail mode. I don't know how to name it exactly. So my 6 question is: Will be any good side of reinstallation my second server as member of ISPConfig multiserver? Will it be possible to keep relay mode of Postfix? Thank you in advance.