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Date: Tue, 7 Nov 2006 14:19:39 +0900
From: "Trustin Lee" <trustin@gmail.com>
To: "Apache Directory Developers List" <dev@directory.apache.org>
Subject: Re: [Mitosis] IM Session with Trustin
In-Reply-To: <455003AB.7050802@bellsouth.net>
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On 11/7/06, Alex Karasulu <aok123@bellsouth.net> wrote:
>
> 1). When adding an entry that was already marked entryDeleted true, why
> does mitosis perform a modify operation on the entry instead?
>
> Answer: I don't remember maybe I did it this way because of a lack of
> knowledge.


No, it was to avoid recursive deletion.

5). Looks like you have not finished implementing the move operation as
> is indicated
> here in OperationFactory line 188 in newMove():
>
>          if ( !deleteOldRn )
>          {
>              throw new OperationNotSupportedException( "deleteOldRn must
> be true." );
>          }
>
> Is it that you did not implement this or that it was not possible
> because of some issue?


If deleteOldRn is false, the move operation is not a move operation but a
copy operation.  This means a newly copied entries have to have different
UUIDs.

8). Could you also elaborate more on the log and how it is used?
>
> Answer: Yep


The answer was that logs are used to send the changes made in a replica.
The logs are selected and sent to the other replica when UV differences are
detected.  We also calculate PV and UV from the logs.  It's implemented with
Derby, an embedded RDBMS, so I used SELECT MAX(...) and MIN(...) to get UV
and PV.  I think this is already described in the existing documentation.

Trustin
-- 
what we call human nature is actually human habit
--
http://gleamynode.net/
--
PGP key fingerprints:
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On 11/7/06, <b class="gmail_sendername">Alex Karasulu</b> &lt;<a href="mailto:aok123@bellsouth.net">aok123@bellsouth.net</a>&gt; wrote:<div><span class="gmail_quote"></span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
1). When adding an entry that was already marked entryDeleted true, why<br>does mitosis perform a modify operation on the entry instead?<br><br>Answer: I don't remember maybe I did it this way because of a lack of<br>knowledge.
</blockquote><div><br>No, it was to avoid recursive deletion.<br></div><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">5). Looks like you have not finished implementing the move operation as
<br>is indicated<br>here in OperationFactory line 188 in newMove():<br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if ( !deleteOldRn )<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; throw new OperationNotSupportedException( &quot;deleteOldRn must<br>be true.&quot; );<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<br><br>Is it that you did not implement this or that it was not possible<br>because of some issue?</blockquote><div><br>If deleteOldRn is false, the move operation is not a move operation but a copy operation.&nbsp; This means a newly copied entries have to have different UUIDs.&nbsp; 
<br></div><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">8). Could you also elaborate more on the log and how it is used?<br><br>Answer: Yep
</blockquote><div><br>The answer was that logs are used to send the changes made in a replica.&nbsp; The logs are selected and sent to the other replica when UV differences are detected.&nbsp; We also calculate PV and UV from the logs.&nbsp; It's implemented with Derby, an embedded RDBMS, so I used SELECT MAX(...) and MIN(...) to get UV and PV.&nbsp; I think this is already described in the existing documentation.
<br><br>Trustin<br></div></div>-- <br>what we call human nature is actually human habit<br>--<br><a href="http://gleamynode.net/">http://gleamynode.net/</a><br>--<br>PGP key fingerprints:<br>* E167 E6AF E73A CBCE EE41&nbsp;&nbsp;4A29 544D DE48 FE95 4E7E
<br>* B693 628E 6047 4F8F CFA4&nbsp;&nbsp;455E 1C62 A7DC 0255 ECA6

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