Richard,
> Use scp. Open port 22 and allow only connections from the backup machine
> with a specified user (e.g. "pgbackup").
>
> Alternatively, you might try dumping in a text-format and using rsync to
> transfer changes.
I really do'nt want to open separate port for backup only.
Pelase, can you recomment a solution which uses port 5432 owned by Postgres
?
>> pg_read_file() can read only text files and is restricted only to
>> superusers.
>>
>> How to add a function pg_read_backup() to Postgres which creates and
>> returns backup file with download speed ?
>> This problably requires implementing some file download protocol.
>
> Just don't try and do it within PG - use the tools the system provides.
How to force postmaster to run the tool which system provides when it
receives backup request instead of postgres child process ?
Andrus.