Read the doc about Replikation. I think you can simply set up the New machine AS streaming Replikation slave and promote it than AS master - with no downtime.
Am 20. Dezember 2015 02:50:57 MEZ, schrieb Amitabh Kant <amitabhkant@gmail.com>:
Hi
I have a Postgresql 9.1 instance running on FreeBSD 9.0 (64 bit). The machine is now running out of space and no extra hard disk can be added to the machine. I am planning to move the instance to another machine which is running FreeBSD 10.2 (64 bit) with the same Postgresql version.
One idea is to take a dump and transfer the data, which is my fallback plan. The other is to simply copy over the data directory since the postgresql version is same (64 bit OS with PG 9.1) on both machine. This will reduce a lot of down time as the data is around 1 TB .
Old Machine: FreeBSD 9.0 (64 bit) with Postgresql 9.1 (UFS file system)
New Machine: FreeBSD 10.2 (64 bit) with Postgresql 9.1 (UFS file system)
The directory structure and others hardware would remain the same in both machine, apart from a increased capacity of hard disk and RAM in the new machine.
Just wondering if anybody has already done such a move or has any suggestions if I should or should not go the directory copy route?
Thanks
Amitabh
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