On 22/01/2005 7:19 a.m., Troy Engel wrote:
Increasing we're having to hybrid all our servers (run the mysql client RPMS for 3.x, but server binaries for 4.0 over in /usr/local/) for more and more projects that need the 4.0 features. I've also read that with 4.1 server binaries, the 3.x client apps will no longer work?
I simply upgraded MySQL using the 4.1.x RPMs from mysql.com, haven't seen any problems (with CentOS-3).
The only compatibility issue I know of with regard to 3.x clients (and 4.0 clients) connecting to 4.1 servers is that 4.1 has a new password hashing algorithm. If you use an old format mysql privileges database or run mysqld with --old-passwords (add old-passwords to the [mysqld] section of /etc/my.cnf) there is no problem.
http://dev.mysql.com/doc/mysql/en/Password_hashing.html
-Simon