Friday, November 6, 2009

Prevention tips for MySQL database corruption

A corrupted MySQL database is a database in which some of the records are lost and you are not able to perform any functions. While the causes for MySQL database corruption might vary, the result in most cases remains the same – unmountable MySQL database. The best and easiest way to avoid corruption is by following some prevention tips. But, if in case, the database corrupts even after following the prevention tips, then the only to access MySQL database records is by restoring the data from an updated backup. However, if no backup is available or backup falls short to restore the required data, then you will need to opt for an effective MySQL Repair tool.

MySQL database corruption could be a result of numerous factors, to include:

Using “killall -9 mysqld” command to shutdown the server and killing all the ongoing MySQL processes.
Improper shutdown of the MySQL database server due to power outage.
Fiddling with the data files, especially under the feet of mysqld
Internal error in MySQL database server
Kernel Panic
Virus Attack

Prevention Tips:

Always test the kernel with mysqld.
Always have a branded UPS to resume all your operations when you encounter a power outage.
In case of slightest of doubt of MySQL database corruption, run the below commands:
CHECK TABLE tablename
REPAIR TABLE tablename
Always maintain an updated backup. It is advisable to create database backup at least once in a week.
Always have a powerful anti-virus software installed in your system.

The above prevention tips allow you to save your data from most of the corruption scenarios. However, if these prevention fail to save your MySQL database from corruption, and you have not created any backup, then you will need to opt for advanced MySQL Recovery software. Such MySQL Repair applications employ intensive scanning techniques to scan and repair corrupted MySQL database. The easy-to-understand graphical user documentation of the software makes it usable to both technical and non-technical users.

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