I am purchasing the Professional edition of Zimbra Network (Currently attempting a trial version setup) and am wondering about server clustering.
What exactly is Server Clustering? I understand it as linking up a couple servers so that mail distribution, accounts, domains, and workload are shared?
Can it be done on CentOS? (As it is RHEL based)
Can I cluster 2 servers, and later add a third, fourth, etc?
If I cluster servers, does this mean that mail/domains will be spread out accross the servers and that they will all work as one server ?
If I have two zimbra servers clustered, can I create an account on one, and the Zimbra software will decide where to actually put the account, or .. ?