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Re: Database corruption


Hello Marko, Jerome,

Marko, thanks for your comments.

On 04/03/2017 08:17 AM, Marko Mäkelä wrote:
> I wonder if this could be caused by missing MDL protection around
> TRUNCATE TABLE, which would then incorrectly allow concurrent INSERT and
> One place where MDL is definitely missing is DROP DATABASE (reported as
> MDEV-11342 <https://jira.mariadb.org/browse/MDEV-11342>).

This is assigned to Sergey Vojtovich. Sergey is currently on vacation
and will be back in the last decade of April.

Marko, do you think it is something hard to fix?

(Sorry, I'm not strong in this area of the code)

> That said, the InnoDB in MariaDB 10.2 is based on MySQL 5.7, and one
> difference between MySQL 5.6 and 5.7 is that InnoDB supports crash-safe
> atomic TRUNCATE TABLE for .ibd files (WL#6501
> <http://dev.mysql.com/worklog/task/?id=6501>).
> Best regards,
> Marko
> -- 
> M|17
> April 11 - 12, 2017
> The Conrad Hotel
> New York City
> https://m17.mariadb.com/
> Marko Mäkelä, Lead Developer InnoDB
> MariaDB Corporation

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