> -----Original Message-----
> From: Ron <ronljohnso...@gmail.com>
> Sent: Tuesday, April 17, 2018 7:59 AM
> To: pgsql-general <pgsql-gene...@postgresql.org>
> Subject: pg_dump to a remote server
> We're upgrading from v8.4 to 9.6 on a new VM in a different DC.  The dump
> file will be more than 1TB, and there's not enough disk space on the current
> system for the dump file.
> Thus, how can I send the pg_dump file directly to the new server while the
> pg_dump command is running?  NFS is one method, but are there others
> (netcat, rsync)?  Since it's within the same company, encryption is not
> required.
> Or would it be better to install both 8.4 and 9.6 on the new server (can I
> even install 8.4 on RHEL 6.9?), rsync the live database across and then set
> up log shipping, and when it's time to cut over, do an in-place pg_upgrade?
> (Because this is a batch system, we can apply the data input files to bring
> the new database up to "equality" with the 8.4 production system.)
> Thanks
> --
> Angular momentum makes the world go 'round.




The ability of pg_dump and psql to write to or read from pipes makes it 
possible to dump a database directly from one server to another, for example:

pg_dump -h host1 dbname | psql -h host2 dbname

Jack Gao

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