How To Recover Corrupted MyISAM File In MySQL 5.0 Article

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How to recover corrupted MyISAM file in MySQL 5.0

MySQL is one of the most popular open-source database in the world. The reasons its popularity is its availability, performance, robust transactional support, etc.

Author: Manya Gupta

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It offers three types of database engines, MyISAM, InnoDB, and MySQL Archive wherein the MyISAM table is the default table type that is fast, simple to use, and allows full-text searching. Though the MyISAM table is reliable, it can become corrupt and, thus, inaccessible following a system crash. In such cases, you should use the Repair Table command to recover MySQL table. However, if the you are still not able to repair MySQL database then you should opt for a third-party MySQL database recovery software to do the needful.

Consider a scenario wherein you are have MySQL 5.0 installed on your system. You run the myisamchk command to check a table and an error message is displayed, that is:

“clients are using or haven't closed the table properly.”

Cause:
The root cause for the aforementioned error message is that the MyISAM index file has not been closed properly. There could be the following reasons for this:
A table was modified by the myisamchk command while it was in use by mysqld.
MySQL crashed while an update was being written on the table.
Multiple mysqld servers are using the table simultaneously that may result in data integrity and, hence, data corruption.
A MyISAM table has been copied without using the Lock Tables and Flush Tables command.

Resolution:
To resolve this issue, you should use the following methods:
Repair the corrupted table by using the Repair Table command, if mysqld is running.
Repair the corrupted table by using the myisamchk command, if mysqld is not running.

The aforementioned methods should be able to perform MySQL recovery. However, if you still are not able to recover MySQL database then you should consider using a third-party MySQL database repair software. Such tools are read-only in nature that do not overwrite the original database using fast yet sophisticated scanning algorithms.

Stellar Phoenix Database Recovery for MySQL is a MySQL recovery software that enables you to repair MySQL database. It is able to recover MySQL database for the MyISAM and InnoDB MySQL database storage engines. This MySQL repair tool supports MySQL recovery of MyISAM (.myd, .myi, .frm) and InnoDB (.ibdata, .ibd, .frm) files. It is compatible with Windows 7, Vista, Server 2003, XP, and Server 2000. It is supported by MySQL 4.x and 5.x versions.

About Author

Manya Gupta is a database recovery expert and doing research on database recovery and MySQL database recovery .
To know more about MySQL database recovery just visit: http://www.database-recovery-software.com/mysql-database-recovery.php

Article Source: http://www.1888articles.com/author-manya-gupta-33422.html

How to recover corrupted MyISAM file in MySQL 5.0