Hello, I need help in using postgresql 8.4 data in postgres 9.4 version. Do I need to run any tool to achieve the same?
Steps i followed is ran postgresql 8.4 and 9.4, copied data from 8.4 instance to 9.4 and try to start postgresql 9.4 but no luck, getting below error.
[root@ms-esmon esm-data]# su - postgres -c "/opt/rh/rh-postgresql94/root/usr/bin/postgres -D /var/ericsson/esm-data/postgresql-data/ 2>&1 &" [root@ms-esmon esm-data]# LOG: skipping missing configuration file "/var/ericsson/esm-data/postgresql-data/postgresql.auto.conf" 2018-04-16 06:52:01.546 GMT FATAL: database files are incompatible with server 2018-04-16 06:52:01.546 GMT DETAIL: The data directory was initialized by PostgreSQL version 8.4, which is not compatible with this version 9.4.9.
You cannot simply copy data between major versions. Look into pg_upgrade utility to upgrade your database, or you could use pg_dump/pg_restore to migrate between major versions.