Updating PostgreSQL

It is possible to do a file system copy of postgres and use the db tools to perform an upgrade Create a folder to contain the original data on the new target server

/opt/postgresql/orig/

On the source (orig) server, stop postgres and move the current (should be small) data folder

/etc/init.d/postgresql-95 stop

Now perform the copy

cd /opt/
rsync -av postgresql root@172.21.40.132:/opt/postgresql/orig/

On the new server copy the existing data folder (just in case)

/etc/init.d/postgresql-95 stop
mv /opt/postgresql/pg95/data /opt/postgresql/pg95/orig95
mkdir /opt/postgresql/pg95/data
mkdir /opt/postgresql/pg95/data/log
chown -R postgres:postgres /opt/postgresql/pg95/data

"su" to the postgres user

su - postgres

Create base db on server

/opt/postgresql/pg95/bin/initdb /opt/postgresql/pg95/data -E utf8 --lc-collate=C --lc-ctype=utf-8 --lc-monetary=C --lc-numeric=C

Exist "su" on new server and start service

exit
mkdir /opt/postgresql/pg95/data/pg_log
chown postgres:postgres /opt/postgresql/pg95/data/pg_log
/etc/init.d/postgresql-95 start

On the new server run the following

mv /opt/postgresql/pg95/data /opt/postgresql/pg95/orig95
pg_upgrade -v -d /opt/postgresql/orig/data -D /opt/postgresql/pg95/data -b /opt/postgresql/orig/bin/ -B /opt/postgresql/pg95/bin/