Hello! 1. H2 uses file system locks by default for a very long time, so there is no additional file. In few special cases file systems (usually virtual or remote ones) don't support locks well. In these cases you can add ;FILE_LOCK=FILE to JDBC URL to use that old method instead of modern one. 2. Operating systems usually can rename files even when they are accessed, if application doesn't try to re-open these files under old names it shouldn't produce any problems. But this is a bad idea anyway, it still can break some commands, such as SHUTDOWN COMPACT and others.
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