I'm trying to recover a single database that's part of an instance with other databases which I do not want to recover. We do a physical backup and have the WAL archive files available. The purpose of this is to place a copy of one of the Prod databases onto the QA server which has other existing databases that we want to keep.
What I was thinking was that I could recover all of the files to a separate area, then basically just copy the files from that database's directory into the QA instance database directory (same oid.) There was an existing copy on the QA server and I want to replace it with the new copy.
Is this possible? I know that I could simply do a pg_dump into this QA database but this seems to take way too long - days instead of the hours that it takes to unzip the physical backup file into a directory on the QA server.
I also know that I could easily create a new instance but I have a constraint that the IP addresses and ports cannot be changed.
If this instance only had a single database it would be a simple physical restore, but the presence of the additional databases has me stumped.
The PostgreSQL version is 9.1.9. The server is Red Hat Enterprise Linux Server release 6.2 (Santiago) on a VM machine - 8 GB RAM with 2 CPUs:
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 2
On-line CPU(s) list: 0,1
Thread(s) per core: 1
Core(s) per socket: 2
CPU socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 44
Stepping: 2
CPU MHz: 2660.000
BogoMIPS: 5320.00
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 12288K
NUMA node0 CPU(s): 0,1
Thanks for any ideas or myth debunking that you can apply to this conundrum.
