FWIW - if you are looking at a backup approach with the dumpall, I have
found that using a rsync to just mirror the file system is waaaaaaaay
faster, and hence less prone to interuption. This is how it is recommended
with a warm standby development, and works great, and also is far less
consumptive of system resources. The big limitation is that if you are
duplicating for an upgrade, it might be problematic since the file system
dupes are PG Version specific I think.
regards,
r.b.