New answers tagged upgrade
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This is not a new problem
Feb 07, 2007 : Upgrading from MySQL 3.23 to 5
Oct 26, 2010 : Upgrading from MySQL 4.1 to 5
On May 11, 2007. someone had "fun" with this upgrading MySQL 4.1 to 5.0.41. Notice his comment (Look for Posted by Phil Collett on May 11 2007 7:11pm in the Post):
I had some fun upgrading from mysql-4.1.15-win32 (mysql 4.1) to
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In general, yes, you can do this, the 2.4 binaries can be used as drop in replacements. However, there are exceptions. In sharded clusters for example, you have to make sure to do the meta data upgrade
Essentially, the caveats are all really deployment and feature (authentication), not version based. Basically make sure to read the notes here:
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Well one thing you may want to consider doing is validating your application(s) still work on a test instance that contains the same database and upgrading it to the newer service pack. While rare and usually changes are backward compatible, there could be behavior changes to things like the optimizer that would be impossible to guess exactly how they might ...
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