Concert: Can I upgrade directly from Concert 2.0 to version 2.6 and use the old 2.0 database?
Question: Can I upgrade directly from a Concert 2.0 server to Concert 2.6 server and reuse the old 2.0 database in the 2.6 installation?
Answer: The old 2.0 server database is not compatible with the Concert 2.6 server database. This means that if the server is upgraded directly to the new 2.6 server version the database will have to be rebuilt from scratch. This will require that both the CentOS platform and Concert 2.6 to be installed, which will wipe clean the old 2.0 server and old CentOS installation.
This doesn't apply when upgrading from Concert server 2.5 to Concert 2.6 server, when upgrading from 2.5 to 2.6 the CentOS installation remains intact and the Concert 2.6 install overwrites the 2.5 install and keeps the database intact.