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I would like to build up an web application with H2 database engine. However, I still don’t know how to back up the data while the database is running after reading this tutorial:
http://www.h2database.com/html/tutorial.html#upgrade_backup_restore
Does H2 output its stored file to somewhere in the file system? Can I just back up the outputted files?
H2 is stored on the file system, but it would be better to use the backup tools that you reference, because the file format can change between versions of H2. If you upgrade H2, it may not any longer be able to read the files it created in a previous version. Also, if you copy the files it uses, I would recommend shutting the database down first, otherwise the copied files may be unreadable by H2.
The location of the file depends on the jdbc url you specify. See the FAQ:
http://www.h2database.com/html/faq.html