Sunday, July 22, 2012

MySQL 5.5 and 5.1 on CentOS 5.5

MySQL 5.5 and 5.1 on CentOS 5.5
1.       Backup  old mysql permission
2.       Delete old mysql permission
3.       Untar database
4.       Update trigger using mysql front tool . 
a.       List of dbs  -- dtr_log ; dtr_log_txn; event_tb_ob_txm
See Image below
5.       Export proc.sql fr.  any of the db slave servers then import to 50.26.
6.       Execute mysql_upgrade
7.       Execute mysqlcheck –all-databases  --repair

Link to upgrade:

MySQL 5.5 and 5.1 on CentOS 5.5
In a couple of days, MySQL 5.1 will move to extended lifecycle support, where only security fixes and the most severe bugs are fixed. MySQL 5.0 has bee like this for a year already. Typically, extended lifecycle will last for two years, after which will become end-of-line, where no support is guaranteed.
CentOS 5.x has been providing MySQL 5.0 in it’s distribution since that was the active stable branch when CentOS 5.0 was released on 12th April 2007 (or more specifically it’s upstream distribution RHEL 5, which was released 14th March 2007). Since then, Sun/Oracle have released MySQL 5.1 and MySQL 5.5, so the Webtatic Yum repository has added them to it’s web stack, which now provides updated versions of all the AMP in LAMP.
This release is different from the previous packages, since it is important to only upgrade MySQL when you are ready, and you may want to chose to follow only 5.1 updates or 5.5 updates. This does mean though that you will have to uninstall your current mysql installation first.
First, to set up the yum repository, install the webtatic-release RPM:
rpm -Uvh http://repo.webtatic.com/yum/centos/5/latest.rpm
MySQL client library is used with several CentOS packages, so to remove MySQL without them, I have a mysql client library which is independent of the client tools, which can be installed first to be used instead.
yum install libmysqlclient15 --enablerepo=webtatic
Then you can uninstall MySQL:
yum remove mysql mysql-*
Then install the new MySQL version (either mysql51 or mysql55 can be installed here):
yum install mysql55 mysql55-server --enablerepo=webtatic
You should upgrade existing tables before setting the server to become a production machine, which can be done by starting the server and running the mysql_upgrade script (this may take time depending on the size of the database).
service mysqld start
mysql_upgrade

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