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https://issues.apache.org/jira/browse/SOLR-1379?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12747735#action_12747735
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Hoss Man commented on SOLR-1379:
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i can imagine situations where having an index that exists purely in ram would
be useful, but i don't really understand the point of a DirectoryFactory that
loads an index from disk into a RAMDirectory ... my understanding (from other
lucene contributors that spend a lot of time worrying about performance) is
that there are very few (and specialized) use cases where this performs better
then just using an FSDirectory and letting the OS cache the disk pages.
do you have some concrete examples of when your patch makes more sense then
just using the default?
> Add RAMDirectoryFactory
> -----------------------
>
> Key: SOLR-1379
> URL: https://issues.apache.org/jira/browse/SOLR-1379
> Project: Solr
> Issue Type: New Feature
> Affects Versions: 1.3
> Reporter: Alex Baranov
> Priority: Minor
> Fix For: 1.4
>
> Attachments: SOLR-1379.patch, SOLR-1379.patch
>
>
> Implement class RAMDirectoryFactory to make possible using RAMDirectory by
> adding the next configuration in solrconfig.xml:
> {code}<directoryFactory
> class="org.apache.solr.core.RAMDirectoryFactory"/>{code}
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