Thank you for detailed info. much appreciated. May i know how to install pg_upgrade ?
With Best Regards Akshay From: "Albin, Lloyd P" <lal...@scharp.org> To: Akshay Ballarpure <akshay.ballarp...@tcs.com> Date: 04/16/2018 08:38 PM Subject: RE: Data migration from postgres 8.4 to 9.4 Akshay , There are several Official ways to upgrade PostgreSQL. 1) Use pg_upgrade (Faster) Postgres 8.4 to Postgres 9.4. Use the Postgres 9.4 version of pg_upgrade. https://www.postgresql.org/docs/9.4/static/pgupgrade.html 2) Dump and Restore your database into a new server (Slower) Postgres 8.4 to Postgres 9.4 Use pg_dump with pg_restore or pg_dumpall with psql from Postgres 9.4 against your Postgres 8.4 Server. You need to use this method if you wish to change your initdb settings, such as the default encoding, turn on checksums, etc. https://www.postgresql.org/docs/9.4/static/app-pgdump.html https://www.postgresql.org/docs/9.4/static/app-pgrestore.html https://www.postgresql.org/docs/9.4/static/app-pg-dumpall.html 3) Swap out the binaries. This can only be done using the same Postgres version (8.4.x or 9.4.x or 10.x) This means that you can upgrade from 9.4.9 to 9.4.12 by just swapping out the binaries. 4) Unofficially you can use things like slony, etc to do a live migration without downtime. Lloyd From: Akshay Ballarpure [akshay.ballarp...@tcs.com] Sent: Monday, April 16, 2018 12:03 AM Subject: Data migration from postgres 8.4 to 9.4 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. With Best Regards Akshay Ericsson OSS MON Tata Consultancy Services Mailto: akshay.ballarp...@tcs.com Website: http://www.tcs.com ____________________________________________ Experience certainty. IT Services Business Solutions Consulting ____________________________________________ =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you
