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https://issues.apache.org/jira/browse/LUCENE-1738?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Rutherglen updated LUCENE-1738:
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Attachment: LUCENE-1738.patch
Very basic start at the patch. The not IW.dir check is removed in the
DirectoryReader ctor called by readerPool. This conflicts with the way
addIndexes currently works. I guess we could add a parameter to segmentInfo
indicating it's ok to include the segmentInfo in getReader?
* Added IW.addIndexesNoSync which doesn't stop indexing during the method, nor
does it synchronously copy the indexes over. The new indexes are scheduled as
merges.
* commit and close call resolveExternalSegments.
* I think we'll want a boolean parameter that synchronously copies the indexes
over but does not start any merging. This is for copying from a filesystem
index. In the replication use case, we're adding ramDirs so we don't need to
immediately merge/copy them over.
* Needs more unit tests
> IndexWriter.addIndexes without syncing
> --------------------------------------
>
> Key: LUCENE-1738
> URL: https://issues.apache.org/jira/browse/LUCENE-1738
> Project: Lucene - Java
> Issue Type: Improvement
> Affects Versions: 2.4.1
> Reporter: Jason Rutherglen
> Priority: Minor
> Fix For: 3.1
>
> Attachments: LUCENE-1738.patch
>
> Original Estimate: 168h
> Remaining Estimate: 168h
>
> When LUCENE-1313 is completed, it would be good to have a way to
> replicate segments from one IndexWriter to another.
> * Callback on successful flush (maybe for other events as well?)
> * Ability to access files for a segment (which would presumably
> be read from the IW ramdir), then copy them to a temporary
> serialized ramdir (or equivalent as ramdir uses extra space in
> blocks, whereas we'll already know the size of the files before
> we write them).
> * On the receiving end, we may be able to use
> addIndexesNoOptimize(Directory[]), however this would entail
> each directory having an extraneous segment_N file for each
> replicated update (so we may want another format).
> * It will rely on having a new public version of SegmentInfo.
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