Recovery from an InnoDB Table Corruption

A catastrophic event can lead to severe damage to database tables, particularly InnoDB tables. When encountering such a situation, understanding the available repair options becomes crucial.

InnoDB Table Corruption Symptoms

The symptoms described in the inquiry, including timestamp errors in the transaction log and index corruption, are indicative of InnoDB table corruption.

Repair Strategies for InnoDB Tables

While there are established tools and techniques for repairing MyISAM tables, specific repair methods for InnoDB tables may not be readily available. However, the suggestion in the response is highly valuable and should be considered:

1. Secure the Data

• Shut down the server immediately.
• Create an image of the disk where the database resides. This ensures multiple attempts at recovery and protects against data loss due to further crashes.

2. Explore Recovery Options

• The reference provided in the response is a valuable resource for understanding InnoDB table recovery. It discusses various tools and techniques, including:

  • ibd_file_repair utility for repairing the corrupted index
  • innodb_file_per_table configuration option to locate the corrupted table file
  • Detailed procedures for executing repairs

It's important to note that attempting to optimize a corrupted table before repairing it may result in the database server crashing. Therefore, it's crucial to follow the recommended steps in the referenced documentation carefully to avoid further damage.