Expand IndexWriter to allow for replicating segments in near realtime
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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: 3.0
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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