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Q&A How to create a dump of a complete MariaDB how the data is at a single point in time?

I don't have a ready answer to the question in the title, but with regards to The plan was to disable the MariaDB service so that no new writes to the database can be made (that have a risk of n...

posted 1y ago by Canina‭

Answer
#1: Initial revision by user avatar Canina‭ · 2023-11-08T12:21:50Z (about 1 year ago)
I don't have a ready answer to the question in the title, but with regards to

> The plan was to disable the MariaDB service so that no new writes to the database can be made (that have a risk of not being included in the dump).

This can be achieved without preventing access to the database engine by shutting it down.

**If** you are using only InnoDB *and* you can guarantee that no clients use `ALTER TABLE`, `CREATE TABLE`, `DROP TABLE`, `RENAME TABLE` or `TRUNCATE TABLE` for the duration of the dump process, then you can pass `--single-transaction` to `mariadb-dump` to obtain a dump of exactly the data that has been committed at the start of the dump.

If that does not apply, **then** you can use `--lock-all-tables` instead; doing so acquires a much wider-ranging lock than simply relying on transactional isolation, but is still less invasive than completely shutting down the database server.

See [mariadb-dump: Options](https://mariadb.com/kb/en/mariadb-dump/#options) for an explanation of those command-line options and many more.