Sorry if this is in the wrong list, but this is the closest I could find...
I have a 8.2.4 database and I installed 8.3.7 and tried using the same /pgsql/data/base directory and got an error about incompatiblity.
The database currently has billions of records but it's sparsely populated. It took about 4 months to just populate the original database and I REALLY don't want to do that again.
Is there a conversion routine to change the files themselves? I know I can dump and reload - but that takes large disk space and time. Any other way around?