Stopping a DB2 LUW database instance with the db2stop command does not result in loss of data as long as the database instance is properly shut down. The db2stop command performs a clean and safe shutdown of the database instance, which means that any committed transactions are flushed to disk and any uncommitted transactions are rolled back. However, if there is an unexpected interruption of the shutdown process, such as a power failure, there is a possibility that some data may be lost or corrupted. Therefore, it is always recommended to have regular backups of your database to ensure that you can recover data in the event of a failure.
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