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https://issues.apache.org/jira/browse/LUCENE-4101?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13288164#comment-13288164
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Jack Krupansky commented on LUCENE-4101:
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Superficially, the new concept of a field that is stored and indexed being two
fields - both with the same name - sounds confusing, but it all depends on how
this will be presented to users. What "model" of the relationship between
"index", "field", and "document" are users expected to understand with respect
to how fields are "stored" vs. "indexed"? Show me the model, and then I could
judge whether it is truly confusing.
Users generally need to be concerned about storage capacity and performance, so
a model that clarifies (and separates) the impact that a stored field has on
index vs. query result performance would be helpful.
Finally, maybe down the road it would be advantageous to have a stronger
separation of indexed and stored fields, even to the point of using separate
JVMs or even machines (e.g., one to identiy results and one or more separate
JVMs/machines to retrieve stored fields for query response) so that index
lookup throughput can be faster and index size can be larger without reducing
the ability to have large numbers of large stored fields. I only mention this
in the context of how it might make sense to migrate users away from the
concept that the "indexed" and "stored" aspects (maybe that's a better word
than just "field") are forever tightly rather than loosely linked.
> Remove XXXField.TYPE_STORED
> ---------------------------
>
> Key: LUCENE-4101
> URL: https://issues.apache.org/jira/browse/LUCENE-4101
> Project: Lucene - Java
> Issue Type: Bug
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Priority: Blocker
> Fix For: 4.0, 5.0
>
> Attachments: LUCENE-4101.patch
>
>
> Spinoff from LUCENE-3312.
> For 4.0 I think we should simplify the sugar field APIs by requiring
> that you add a StoredField if you want to store the field. Expert users
> can still make a custom FieldType that both stores and indexes...
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