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Asked: 2026-05-29T17:52:02+00:00

I am planning to implement a table checksum mechanism to validate that replication has

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I am planning to implement a table checksum mechanism to validate that replication has occured between two master to master MySQL server. But before I know that hashing function always carry a collision risk and I would like to assess the risks of a collision scenario happening. Does anyone have any information to share or links to similar assessment.

My opinion is that the checksum of the same table on 2 replicated server we could basically neglect the risk of collision but I want facts to prove my assumption.

http://dev.mysql.com/doc/refman/5.0/en/checksum-table.html

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  1. Editorial Team

    AFAIK, MySQL calculate the table checksum with CRC32 algorithm. It’s very safe for almost data, but for the probability of the collision, please see CRC32 Collision .

    And I also suggest Percona Toolkit. It has a similar tool for comparing tables by checksum.

    And I also suggest Maatkit’s solution – mk-table-checksum. Maatkit had been merged into Percona Toolkit. Thanks @BaronSchwartz.

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