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https://issues.apache.org/jira/browse/LUCENE-550?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12480274
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Doron Cohen commented on LUCENE-550:
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That's a good point about the task-benchmark karl!
All 4 ReaderTasks are reusing the reader if it is already open, but if it is
not already open, each task opens a private one, and closes it after the task
is done.
I now see that the javadocs can be improved here - especially in the reader
sub-tasks. I will update the documentation to clarify this point.
Anyhow, for the running tasks to share a reader, the alg part of the .alg file
should have something like this:
OpenReader
ReaderTaskA
ReaderTaskB
ReaderYaskC
CloseReader
This way all three tasks would share the same, already open, reader.
> InstantiatedIndex - faster but memory consuming index
> -----------------------------------------------------
>
> Key: LUCENE-550
> URL: https://issues.apache.org/jira/browse/LUCENE-550
> Project: Lucene - Java
> Issue Type: New Feature
> Components: Store
> Affects Versions: 2.0.0
> Reporter: Karl Wettin
> Assigned To: Karl Wettin
> Attachments: lucene-550.jpg, test-reports.zip, trunk.diff.bz2,
> trunk.diff.bz2, trunk.diff.bz2, trunk.diff.bz2, trunk.diff.bz2,
> trunk.diff.bz2, trunk.diff.bz2, trunk.diff.bz2, trunk.diff.bz2,
> trunk.diff.bz2, trunk.diff.bz2
>
>
> An non file centrinc all in memory index. Consumes some 2x the memory of a
> RAMDirectory (in a term satured index) but is between 3x-60x faster depending
> on application and how one counts. Average query is about 8x faster.
> IndexWriter and IndexModifier have been realized in InterfaceIndexWriter and
> InterfaceIndexModifier.
> InstantiatedIndex is wrapped in a new top layer index facade (class Index)
> that comes with factory methods for writers, readers and searchers for unison
> index handeling. There are decorators with notification handling that can be
> used for automatically syncronizing searchers on updates, et.c.
> Index also comes with FS/RAMDirectory implementation.
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