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From "Hoss Man (JIRA)" <>
Subject [jira] Commented: (SOLR-1379) Add RAMDirectoryFactory
Date Wed, 26 Aug 2009 01:39:59 GMT


Hoss Man commented on SOLR-1379:

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

do you have some concrete examples of when your patch makes more sense then just using the

> Add RAMDirectoryFactory
> -----------------------
>                 Key: SOLR-1379
>                 URL:
>             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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