If your application's scheduler is running on multiple servers, you may limit the backup job to only execute on a single server.
To indicate that the task should run on only one server, you may use the --isolated option when running the task on your server:
php artisan backup:run --isolated
The first server to obtain the task will secure an atomic lock on the job to prevent other servers from running the same task at the same time.
To utilize this feature, your application must be using the database, memcached, dynamodb, or redis cache driver as your application's default cache driver. In addition, all servers must be communicating with the same central cache server.
The following commands support the --isolated option:
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backup:run
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backup:clean
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backup:monitor