[jira] [Commented] (LUCENE-5320) Create SearcherTaxonomyManager over Directory

["Michael McCandless (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-5320?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13886521#comment-13886521 ] 

Michael McCandless commented on LUCENE-5320:
--------------------------------------------

+1, thanks Shai!

> Create SearcherTaxonomyManager over Directory
> ---------------------------------------------
>
>                 Key: LUCENE-5320
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5320
>             Project: Lucene - Core
>          Issue Type: New Feature
>          Components: modules/facet
>            Reporter: Shai Erera
>         Attachments: LUCENE-5320.patch
>
>
> SearcherTaxonomyManager now only allows working in NRT mode. It could be useful to have an STM which allows reopening a SearcherAndTaxonomy pair over Directories, e.g. for replication. The problem is that if the thread that calls maybeRefresh() is not the one that does the commit(), it could lead to a pair that is not synchronized.
> Perhaps at first we could have a simple version that works under some assumptions, i.e. that the app does the commit + reopen in the same thread in that order, so that it can be used by such apps + when replicating the indexes, and later we can figure out how to generalize it to work even if commit + reopen are done by separate threads/JVMs.
> I'll see if SearcherTaxonomyManager can be extended to support it, or a new STM is required.



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