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From "Rick Hillegas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-2872) Add Replication functionality to Derby
Date Mon, 09 Jul 2007 20:15:05 GMT

    [ https://issues.apache.org/jira/browse/DERBY-2872?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12511244
] 

Rick Hillegas commented on DERBY-2872:
--------------------------------------

Thanks for the responses, Jørgen and Narayanan. Some more comments follow:

About (2): Thanks, now that you point out the line, I can see it. I don't think further clarification
is needed, just some formatting. The problem for me is that the text flanking the table isn't
enclosed in paragraph tags and this causes my browser to crush the text against the bottom
of the table, where I failed to see it. If you just bracket the two chunks of text with <p>
and </p> then that solves the problem.

I'm going to be giving a lightning talk at OSCON on the state of Derby and I want to know
what if anything I can say about this feature. It sounds as though some increment of functionality
will be delivered in the 10.4 timeframe. Will this functionality be complete enough that someone
can use it? If so, can you characterize the kind of application that will benefit from the
10.4 increment?

> Add Replication functionality to Derby
> --------------------------------------
>
>                 Key: DERBY-2872
>                 URL: https://issues.apache.org/jira/browse/DERBY-2872
>             Project: Derby
>          Issue Type: New Feature
>          Components: Miscellaneous
>    Affects Versions: 10.4.0.0
>            Reporter: Jørgen Løland
>            Assignee: Jørgen Løland
>         Attachments: proof_of_concept_master.diff, proof_of_concept_master.stat, proof_of_concept_slave.diff,
proof_of_concept_slave.stat, replication_funcspec.html, replication_funcspec_v2.html, replication_script.txt
>
>
> It would be nice to have replication functionality to Derby; many potential Derby users
seem to want this. The attached functional specification lists some initial thoughts for how
this feature may work.
> Dag Wanvik had a look at this functionality some months ago. He wrote a proof of concept
patch that enables replication by copying (using file system copy) and redoing the existing
Derby transaction log to the slave (unfortunately, I can not find the mail thread now).
> DERBY-2852 contains a patch that enables replication by sending dedicated logical log
records to the slave through a network connection and redoing these.
> Replication has been requested and discussed previously in multiple threads, including
these:
> http://mail-archives.apache.org/mod_mbox/db-derby-user/200504.mbox/%3c426E04C1.1070904@yahoo.de%3e
> http://www.nabble.com/Does-Derby-support-Transaction-Logging---t2626667.html

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