Lucene 2.9.0 has near real time indexing, writing to a RAMDir which gets
flushed to disk when you do a search.

Does anybody know how this works out with service restarts (both orderly
shutdown and a crash)?  If the service goes down while indexed items are in
RAMDir but not on disk, are they lost?  Or is there some kind of log
recovery?

Also, does anybody know the impact of this which clustered lucene servers? 
If you have numerous servers running off one index, I assume there is no way
for the other services to pick up the newly indexed items until they are
flushed to disk, correct?  I'd be happy if that is not so, but I suspect it
is so.

Thanks,
John
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