How To Repair Corrupted Myisam Table Due To Concurrent Write Operation

MySQL database is the most preferred database across the world

. The most prominent reasons for this preference "" apart from it being an open source database "" are its security, fast performance, reliability, and almost bug-free nature among others. Because of these reasons, MySQL is used extensively in various online applications such as Yahoo!, YouTube, Google, etc. However, as they say nothing is perfect in this world, the MySQL database too can face corruption because of various reasons such as virus infections, abrupt system shutdown when the database is open, human errors, power outages, etc. In such cases, you should consider taking appropriate corrective measures. However, if you are unable to do so, then you should use a third-party MySQL recovery to repair MySQL database.

Consider a scenario wherein you are working on a MySQL table of a database in your organization. When you execute a query to perform some modifications to the table, you find that the executed query is returning incomplete results.

Cause

The most possible reason for this scenario is that you may be using some external program such as myisamchk to make the changes to the table, which is simultaneously being modified by the server. The other possible reason for this is that the table may have got corrupted because of various reasons such as abrupt system shutdown while the database is open, virus infections, human errors, etc.

Resolution

To resolve the situation and, thereby, access the table you need to, first of all, use the CHECK TABLE statement to check the health of the MyISAM table. Then, repair the corrupted MyISAM table by using the REPAIR TABLE command. You can also use these commands with the myisamchk command when mysqld is not running. These steps should address the situation. However, if you are not able to resolve the issue then you should use a third-party mysql database repair tool to repair MySQL database. Such read-only tools are able to recover MySQL database by employing fast yet sophisticated scanning algorithms.

MySQL Database Recovery is a MySQL repair tool that enables you to repair MySQL databases. It enables you to recover MySQL databases built in MyISAM and InnoDB database engines. This mysql repair tool is able to repair various database components such as tables, views, etc. It is able to repair MySQL database files such as .ibdata, .ibd, .frm, .myd, .myi, and .frm files. This MySQL recovery tool is compatible with Windows 7, Vista, Server 2003, XP, and 2000.

by: Advika Singh

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