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Asked: 2026-05-12T15:17:58+00:00

In the documentation of the HSQLDB is a command line statement to start a

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In the documentation of the HSQLDB is a command line statement to start a HSQLDB server (HSQLDB Doc). But there is this “file:mydb” property, so I assume its not in memory-only mode.

How do I run a memory-only HSQLDB server?

I ran the following but get no clue.

java -cp ../lib/hsqldb.jar org.hsqldb.Server -?
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  1. Editorial Team

    use java -cp .\hsqldb-1.8.0.10.jar org.hsqldb.Server -database.0 mem:aname

    In memory mode is specified by the connection url – so if you want, you can just have a server.properties file in the same directory, and set the connection url to use the mem protocol – or if you are using hsqldb in another application that allows you to specify the connection url such as jdbc, specify jdbc:hsqldb:mem:aname.

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