How the realm chooses which peer to send
packets to.
roundRobin(1) - The peer used for each transaction
is selected based on the order in
which peers are configured.
loadBalance(2) - The peer used for each transaction
is based on the load metric (maybe
implementation dependent) of all
peers defined for the realm, with
the least loaded server selected
first.
firstPreferred(3) - The first defined server is always
used for transactions unless
failover occurs.
mostRecentFirst(4) - The most recently used server is
used first for each transaction.