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From "Shai Erera (JIRA)" <>
Subject [jira] [Commented] (LUCENE-4258) Incremental Field Updates through Stacked Segments
Date Mon, 30 Jul 2012 04:12:34 GMT


Shai Erera commented on LUCENE-4258:

I had a chat about this with Robert a couple of days ago, figured it'll be easier to discuss
the differences in approaches/opinions, rather than back and forth JIRA comments. Our idea
of incremental field updates is not much different. Robert stressed that in his opinion we
should tackle first the REPLACE_FIELD operation, which replaces the content of a field entirely
by a new content, because he believes that's the most common scenario (i.e., update the title
field). I believe that term-based updates are very important too, at least in the scenarios
that I face (i.e. adding/removing one ACL, one social tag, one category etc.).

We concluded that the design should take REPLACE_FIELD into consideration from the get go.
Whether we'll also implement UPDATE_FIELD (or UPDATE_TERMS as a better name?) depends on the
complexity of it. Because initially UPDATE_TERMS can be implemented through REPLACE_FIELD,
so we don't lose functionality. UPDATE_TERMS can come later as an optimization.

Robert, if I misrepresented our conclusions, please correct me.
> Incremental Field Updates through Stacked Segments
> --------------------------------------------------
>                 Key: LUCENE-4258
>                 URL:
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: core/index
>            Reporter: Sivan Yogev
>   Original Estimate: 2,520h
>  Remaining Estimate: 2,520h
> Shai and I would like to start working on the proposal to Incremental Field Updates outlined
here (

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