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From "Peter Ondruška" <peter.ondru...@gmail.com>
Subject Re: Just in memory ?
Date Tue, 16 Sep 2008 09:16:06 GMT
Dear Antonio,

you do not mention what OS you run your Derby on but in case you are on Unix
they provide workaround to your requested feature already. For example by
default on all Solaris you have /tmp mounted as tmpfs in swap which is in
memory.

Hopefully this helps to you or others.

Peter

On Tue, Sep 16, 2008 at 10:47 AM, Antonio Goncalves <
antonio.mailing@gmail.com> wrote:

> Hi,
> I'm using the Derby network database to run my application and the Embedded
> mode for testing. Both work fine. But when I use the Embedded mode, Derby
> creates a directory on my hard drive full or files. I would like just to
> have a in-memory database, no I/O, just in-memory. Is it possible with Derby
> ?  This is what I have at the moment :
>
> <persistence-unit name="jolorunSampleJpaPU">
>
>  <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
>         <class>org.jolorun.samples.jpa.basic.Customer</class>
>         <properties>
>             <property name="eclipselink.jdbc.driver"
> value="org.apache.derby.jdbc.EmbeddedDriver"/>
>             <property name="eclipselink.jdbc.url"
> value="jdbc:derby:myDB;create=true" />
>             <property name="eclipselink.jdbc.user" value="APP" />
>             <property name="eclipselink.jdbc.password" value="APP" />
>             <property name="eclipselink.ddl-generation"
> value="drop-and-create-tables" />
>         </properties>
>     </persistence-unit>
> </persistence>
>
>
> I've seen a very old thread (
> http://mail-archives.apache.org/mod_mbox/db-derby-dev/200510.mbox/%3C4364E8D3.9030702@sbcglobal.net%3E)
> that mentions the URL jdbc:derby:memory:myDb but that doesn't work. I've
> cheked out the Derby source code but didn't find anything about that.
>
> Any idea ?
>
> Thanks,
>
> Antonio
>
>

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