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From "Alex Karasulu (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DIRSERVER-1097) Only send net changes during replication
Date Mon, 12 Nov 2007 18:41:51 GMT

    [ https://issues.apache.org/jira/browse/DIRSERVER-1097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12541888
] 

Alex Karasulu commented on DIRSERVER-1097:
------------------------------------------

Great idea!  I was thinking we can do similar optimizations as well when dealing with reverting
things in this ChangeLog thing we're working on now.  The idea is the same, if in rev 10 an
entry is created, then modified in 200, 2345, and deleted in 94872.  Then reverting to rev
7 for example would essentially not include anything with respect to this entry. The code
in the replication subsystem and the changelog shapshotting would essentially have to do similar
things.  Perhaps we can share this code. 

I think there is intense synergy and complementation between this changelog feature and the
replication subsystem.  I'm trying to grasp how revision numbers can be used in concert with
UUIDs to manage various tasks.  Also thinking about how the two can better compliment each
other.  I'd be interested in any thoughts you may have on the matter.  

> Only send net changes during replication
> ----------------------------------------
>
>                 Key: DIRSERVER-1097
>                 URL: https://issues.apache.org/jira/browse/DIRSERVER-1097
>             Project: Directory ApacheDS
>          Issue Type: Improvement
>          Components: mitosis
>    Affects Versions: 1.5.1
>            Reporter: Martin Alderson
>            Priority: Minor
>
> During replication we currently send all changes that have occurred since the target
replica was last brought up to date.  We can optimise this by only sending the net changes.
 As an example, if an entry is created, modified several times then deleted at one server,
we do not need to tell other replicas anything regarding this entry.

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