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From "Kim Haase (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-4578) Documentation: Developer's Guide topic on double-booting is mostly obsolete
Date Fri, 12 Mar 2010 23:47:27 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12844761#action_12844761
] 

Kim Haase commented on DERBY-4578:
----------------------------------

I plan to commit this patch on Monday 3/12 unless I hear there are issues. Hope that's okay.

> 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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