There is a wide perception that since PostgreSQL hasn't ever shipped with a complete replication solution (even the Streaming Replication in 9.0 requires some external code support), its replication options are therefore weak. The opposite is true—because the development community isn't focused on a single replication solution. There are actually so many viable options that just describing them all is a chore. The programs listed in this section don't have the general developer mindshare that the ones already covered do. But most of them have a very specific type of replication problem than they solve better than any of the other alternatives.