All,
After playing around with Lucene, we decided to replace old full-text search
engine with Lucene. I got "Lucene in Action" a week ago and finished reading
most of the book. I got several questions.
1) Since the book was written two years ago and Lucene has made a lot of
changes, is there any plan for 2nd edition? (I guess this question is for
Otis and Erik, btw, it is a great book.)
2) I have two processes for indexing. one runs every 5 minutes to add new
contents into an existing index. Another one runs daily to rebuild entire
index which also handles removing old contents. After rebuild process
finishes indexing, we'd like to replace the index built by first process
(every 5 minutes) with index built by second process. How do i do it safely
and also avoid duplicating or missing documents (It is possible that first
process is still adding documents to the index when we try to replace it
with second one).
NOTE: both processes retrieve data from same database.
3) we are doing indexing on a master server and push index data to slave
servers. In order to make new data visible to client, we have to close
IndexSearcher and open it after new data is coped over. We use web based
application (servlet) as search interface, creating a IndexSearcher as an
instance variable for all clients. My question is what will happen to
clients if I close IndexSearcher while clients are still doing search. How
to safely update index when client are searching?
4) Lucene caches first 100 hits in memmory. We decided to use requery to
return search results back to clients. For first 100 documents, i can
iterator through "Hits". Do i have to use doc(n) to retrive documents for
any documents > 100? Any performance issues?
Thanks in advance for help,
Tony
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