[
https://issues.apache.org/jira/browse/OAK-2247?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Davide Giannella closed OAK-2247.
---------------------------------
Bulk Close for 1.3.0
> CopyOnWriteDirectory implementation for Lucene for use in indexing
> ------------------------------------------------------------------
>
> Key: OAK-2247
> URL: https://issues.apache.org/jira/browse/OAK-2247
> Project: Jackrabbit Oak
> Issue Type: New Feature
> Components: lucene
> Reporter: Chetan Mehrotra
> Assignee: Chetan Mehrotra
> Labels: docs-impacting, performance
> Fix For: 1.3.0, 1.2.3, 1.0.15
>
> Attachments: OAK-2247-v1.patch
>
>
> Currently a Lucene index when is written directly to OakDirectory. For
> reindex case it might happen that Lucene merge policy read the written index
> files again and then perform a sgement merge. This might have lower
> performance when OakDirectroy is writing to remote storage.
> Instead of that we can implement a CopyOnWriteDirectory on similar lines to
> OAK-1724 where CopyOnReadDirectory support copies the index locally for
> faster access.
> At high level flow would be
> # While writing index the index file is first written to local directory
> # Any write is done locally and once a file is written its written
> asynchronously to OakDirectory
> # When IndexWriter is closed it would wait untill all the write is completed
> This needs to be benchmarked with existing reindex timings to see it its
> actually beneficial
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
