This build use a spec file close to the one from f14. 

The new InnoDB plugin (version 1.0.15 GA) is also available. The configuration file (/etc/my.cnf) contains the directives needed to enable it (except for EL-4).

WARNING: before upgrading, a full backup of your databases seems mandatory (a logical dump using mysqldump for example).

 

Simplest way to install is to use  yum !

yum --enablerepo=remi update mysql-server

For whose who prefer the download and manual installation, see the repository

Like after each upgrade, running the mysql_upgrade command is required. It checks all tables in all databases for incompatibilities with the current version of MySQL Server. If a table is found to have a possible incompatibility, it is checked. If any problems are found, the table is repaired. In all case, reading the documentation is recommended:

This update will probably be the last of MySQL 5.1.