Tuesday, December 29, 2009

MySQL Database Corruption post Collation Issues

Now-a-days, most of the web sites use MySQL database to maintain and store their records. However, the need to change the hosting of the web site arises when the user wants to shift to some other server. To do so, the user also needs to transfer the MySQL database from one server to another. The three ways by which the user can shift his/her database to another server are using phpMyAdmin, command line mysql client tools, and other third-party applications. While shifting MySQL database shifting to some other server is an easy task, the process can also result into corruption of database. In such situations, the records stored in the database become inaccessible. For easy access of MySQL database records in these corruption scenarios, you will need to restore the data from an updated backup. But, in case of absence of an updated backup or backup file getting corrupted, you will need to use advanced MySQL Repair application that can repair your database.

Consider a practical case, where create a large MySQL database that also contains some Turkish characters. You transfer your database from a dedicated server to a shared server. However, when the transfer process is complete, your database becomes corrupt. This can be easily identified as the Turkish characters do not display correctly in the database.

Cause:

The root cause for the corruption of your MySQL database could be interrupted or incomplete transfer.

Resolution:

To repair your corrupted MySQL database you will need to use the “Repair” command to perfectly repair your database. The syntax for the command is as follows:

repair table tablename [,tablename1...][options]

While the repair command proves successful in most cases, the command fails to repair when the corruption level is too high. For such severe corruption situations, only an advanced MySQL Database Repair utility can help. Such Repair MySQL Database tools use advanced scanning methods to orderly repair the corrupt database and restore it on user-specified location. With interactive user documentation and interface, the software becomes easily understandable to both technical and non-technical users. The software is absolutely non destructive in nature.

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