Backup Stages - MyDumper documentation

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# Backup Stages

When mydumper start to take a backup needs to execute multiple task and reach milestone.

## Determine backup strategy

There are multiple `locking options` that you can instruct mydumper to take backups. You should review which locking mechanisim is the best for you.

## Send locking statements

mydumper establishes a primary main connection and in some cases a secondary main connection. We need them to synchronize the working threads.

## Start jobs creation

At this point we are able to start to create jobs depending the filters that has been used. For instance, if you used `-B`, we need to export the schema definition but we also need to create the jobs to export the schema of the tables and the data in it.

## Start the dump threads

As the locking mechanisim is in please we are allow to create the working threads to start processing the jobs.

## Release lockings

Once the working threads are in sync, the main connection is allowed to release lockings related to the synchronization of the workers.

## Wait backup to complete

The workers will be processing the jobs, exporting the schema and data. The main thread will be waiting until they finish.

## Releasing remaining lockings

Depending on the locking mechanisim that you configure, we might need to release the remaining locks.