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https://issues.apache.org/jira/browse/DERBY-4578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12844972#action_12844972
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Knut Anders Hatlen commented on DERBY-4578:
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Looks great, Kim! +1
> Documentation: Developer's Guide topic on double-booting is mostly obsolete
> ---------------------------------------------------------------------------
>
> 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
> Attachments: cdevdvlp20458.html, cdevdvlp20458.html,
> DERBY-4578-2.diff, DERBY-4578.diff
>
>
> 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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