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From "Kim Haase (JIRA)" <j...@apache.org>
Subject [jira] Created: (DERBY-4578) Documentation: Developer's Guide topic on double-booting is mostly obsolete
Date Tue, 09 Mar 2010 16:37:27 GMT
Documentation: Developer's Guide topic on double-booting is mostly obsolete
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                 Key: DERBY-4578
                 URL: https://issues.apache.org/jira/browse/DERBY-4578
             Project: Derby
          Issue Type: Bug
          Components: Documentation
    Affects Versions: 10.5.3.0
            Reporter: Kim Haase
            Assignee: Kim Haase
            Priority: Minor


The topic "Double-booting system behavior", http://db.apache.org/derby/docs/dev/devguide/cdevdvlp20458.html,
mostly describes issues that come up if you use a JDK earlier than 1.4. Since such JDKs are
no longer supported for Derby, the info about these issues should be removed. What needs to
remain is that with the embedded driver, Derby DOES prevent two instances of Derby from booting
the same file-system database. 

The problem doesn't exist with in-memory databases -- the db doesn't exist outside the JVM,
so multiple Derby instances could refer to an in-memory db with the same name, but they wouldn't
be the same db. That needs to be said too. 

The last paragraph, to the effect that if more than one Derby instance needs to access the
same database you should use the Network Server, can remain (with some edits).

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