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https://issues.apache.org/jira/browse/LUCENE-4258?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13425079#comment-13425079
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Shai Erera commented on LUCENE-4258:
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bq. BTW, since the new method is to handle multiple fields (as the name
suggests), the operation descriptions should also be in plural: UPDATE_FIELDS
and REPLACE_FIELDS.
Ok. I think to not confuse though, we should call it UPDATE_TERMS (not FIELDS).
Then someone can updateFields() twice, once for all the fields which he wants
to REPLACE and second for the fields he just wants to update their terms.
bq. What about merging?
I wrote about it above -- MergePolicy will need to take care of these stacked
segments, and we'll add something like ,merge/expungeFieldUpdates so the app
can call it deliberately.
bq. seems like the app should be using doc values instead, and we should
(eventually) make doc values updatable?
I agree we should not UPDATE_TERMS fields that record norms. I'm not sure that
every use case of storing info in the payload today can be translated to using
DocValues, so I don't want to limit things. So, let's start with UPDATE_TERMS
taking care of fields that omit norms. Then, if we handle payload or not for
few use cases, can become as an optimization later on. In the meanwhile, apps
will just need to replace the entire field.
Progress, not perfection ! :)
> Incremental Field Updates through Stacked Segments
> --------------------------------------------------
>
> Key: LUCENE-4258
> URL: https://issues.apache.org/jira/browse/LUCENE-4258
> 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 (http://markmail.org/message/zhrdxxpfk6qvdaex).
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