I was going through upgrade process of mysql server. It is mentioned that to upgrade from 4.1 to 5.5 we need to upgrade step by step like first to 5.0,5.1 ...5.4 and then 5.5.
I have some questions :
- What if we directly upgrade from 4.1 to 5.5. What might get effected? functionality or problem related to upgrading
- Chances to loose data ? Even though I'll take backup using 'mysqldump --all-data-base' option.
- Lets say, I have two database. I'll take only two database backup. I'll install latest version of mysql 5.7 and load two database back. What are chances to loose data or get corrupted ?
I'm curious to know this. If anybody tried? Because I need to do upgrade in live server.
Is there any step by step document which tells exact steps to upgrade from 4.1 to 5.5 in linux server