Master-Master-Replication, LoadBalancing & Failover

ich suche für unseren Kunden eine Lösung für Postgres 8.2.x Linux, die diese Anforderungen erfüllt

Req1) Master master replication supported, not only master / slave replication with only the master being writable. If you do have multiple slave systems they are only useful from a backup and standby perspective. Our Application must have a db-connection it can write to.

Req2) Replication of schema should also be possible, not only data

Req3) Not only a hot-standby-solution is needed. Load Balancing is wanted for the future.

Zur Zeit scheint mir Cyberclusterdie einzige Lösung zu sein. Ist das so?

Viele Grüße