hi all
I need to return certain fields of all matched documents quickly.
I am now using Document.get(field), but the performance is not well
enough. Originally I use HashMap to store these fields. it's much
faster but I have to maintain two storage systems. Now I am
reconstructing this project. I want to store everything in lucene.
when I use an IndexSearcher to perform searching, I can get
related fields by docID. it must thread safe. And like the IndexReader
it's a snapshot of the index
Here are some solutions I can come up with:
1. StringIndex
I have considered StringIndex but some fields need to tokenize.
maybe I can use two fields, one is tokenized for searching. Another is
indexed but not analyzed, the later one is only used for StringIndex.
If there is any better solution, maybe I have to use this one.
2. Associating a Map with each IndexReader
when the IndexReader is opened or reopened, I need to iterate
through each documents of this Reader and put everything into a map.
The problem is it's slower and I don't know whether it's problematic
with NRT.
is there any other better solution? thanks.
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