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Posted to dev@lucene.apache.org by "David Smiley (JIRA)" <ji...@apache.org> on 2014/03/16 05:50:50 UTC
[jira] [Updated] (LUCENE-2025) Ability to turn off the store for an
index
[ https://issues.apache.org/jira/browse/LUCENE-2025?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
David Smiley updated LUCENE-2025:
---------------------------------
Fix Version/s: (was: 4.7)
4.8
> Ability to turn off the store for an index
> ------------------------------------------
>
> Key: LUCENE-2025
> URL: https://issues.apache.org/jira/browse/LUCENE-2025
> Project: Lucene - Core
> Issue Type: New Feature
> Components: core/index
> Reporter: Michael Busch
> Assignee: Michael Busch
> Priority: Minor
> Labels: gsoc2014
> Fix For: 4.8
>
>
> It would be really good in combination with parallel indexing if the
> Lucene store could be turned off entirely for an index.
> The reason is that part of the store is the FieldIndex (.fdx file),
> which contains an 8 bytes pointer for each document in a segment, even
> if a document does not contain any stored fields.
> With parallel indexing we will want to rewrite certain parallel
> indexes to update them, and if such an update affects only a small
> number of documents it will be a waste if you have to write the .fdx
> file every time.
> So in the case where you only want to update a data structure in the
> inverted index it makes sense to separate your index into multiple
> parallel indexes, where the ones you want to update don't contain any
> stored fields.
> It'd be also great to not only allow turning off the store but to make
> it customizable, similarly to what flexible indexing wants to achieve
> regarding the inverted index.
> As a start I'd be happy with the ability to simply turn off the store and to
> add more flexibility later.
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