<
From version < 12.1 >
edited by Sergiu Dumitriu
on 2011/03/21
To version < 12.2 >
edited by Sorin Burjan
on 2011/04/01
>
Change comment: There is no comment for this version

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1 -XWiki.Sergiu
1 +XWiki.Sorin
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2 2  
3 3  = Compatibility Considerations =
4 4  == MyISAM storage engine ==
5 -MyISAM (the default storage engine for MySQL) does not support transactions. If there is an error while data is being saved to the database, XWiki will attempt to rollback the transaction to it's previous known good state. If you use MyISAM it will do nothing, leaving the database in whatever state it was in when the error occurred.
6 -**If you use MySQL with default engine MyISAM, you will most likely corrupt your database.** We highly recommend using a storage engine such as InnoDB which supports transactions.
5 +MyISAM (the default storage engine for MySQL) does not support transactions. If there is an error while data is being saved to the database, XWiki will attempt to rollback the transaction to it's previous known good state. If you use MyISAM it will do nothing, leaving the database in whatever state it was in when the error occurred.
7 7  
7 +{{warning}}
8 +If you use MySQL with default engine MyISAM, you will most likely corrupt your database.** We highly recommend using a storage engine such as InnoDB which supports transactions.
9 +{{/warning}}
10 +
8 8  == MySQL versions older than 5.0 ==
9 9  XWiki does not fully work with MySQL versions 4.x or lower, due to several limitations of the way the SQL standards are implemented in MySQL, limited support for non-latin1 encodings, the flaky integration of Hibernate and MySQL 4, and other things. Most of the application works fine, but there are some parts that cannot easily be fixed, so if you must use MySQL 4.x, you're doing it on your own. Seriously, MySQL 4 is pretty old and buggy, you should consider upgrading.
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