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Old 04-02-2008, 12:59 AM   #1
Registered: May 2006
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Question Mysql upgrade without GUI


Can anyone explain how to upgrade MySql from 4.1 to 5.0 in a CentOS 4 server? I can only access it through ssh, so everything needs to be done from the command line. I have tried with 'yum upgrade mysql', but it does not go beyond the current version number and only updates to the latest MySql4 version.

I would appreciate any help.
Old 04-02-2008, 07:37 AM   #2
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mysql 5 is apparently in the centosplus repositories (unless it's gone more mainline than this... so just ensure that your yum repo is enabled for that version and you should then be able to do yum upgrade to it. I'd suggest doing a "yum search mysql" to see all the potential packages available, as in that link you'd want mysql-server, not just mysql
Old 04-02-2008, 03:03 PM   #3
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yum search mysql* displays lots of packages, but none of them is from version 5.
And I'm afraid I don't know how to "enable my yum repo for that version". Somewhere else they told me to try:
yum --enablerepo=centosplus upgrade mysql*

but it gives me:

Setting up repositories
Cannot access repository dir //var/cache/yum/centosplus
Error: Cannot access repository dir //var/cache/yum/centosplus

Any more detailed instructions would be appreciated.

Thanks a lot.
Old 04-05-2008, 05:04 PM   #4
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Anyone knows how is yum supposed to know the url of repositories? That is, how it translates a name like 'centosplus' into the url where the packages are located?
Old 04-05-2008, 05:27 PM   #5
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Look at the files in /etc/yum.repo.d

You should see URL info there.
Old 04-05-2008, 08:35 PM   #6
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Be careful about upgrading MySQL 4 -> 5. The versions are NOT completely compatible on the database level. Search for some documentation about it. I forgot which problems it exactly gave, but one of them had to do with passwords.

Old 04-06-2008, 09:11 AM   #7
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I ran MySQL 5.0.x on CentOS 4.X without problems but downloaded the RPM's directly from MySQL's site to install from, not yum. 5.0.45 ran without problems, which at the time was the latest stable version available from MySQL in RPM format.
Old 04-08-2008, 07:35 AM   #8
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I finally found that there is an option in the repo definition files to disable a given repo. [centosplus] by default contains the line enabled=0, so I commented it out and now yum shows me the Mysql 5 packages and lets me upgrade Mysql to that version.

Thanks a lot to you all for your suggestions.


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