Li Li, have you considered allocating a RAM-Disk? It's not the most flexible thing... but it's certainly close, in performance to a RAMDirectory. MMapping on that is likely to be useless but I doubt you can set it to zero. That'd need experiment.
Also, doesn't caching and auto-warming provide the lowest latency for all "expected queries" ? Paul Le 11 juin 2012 à 10:50, Li Li a écrit : > I want to use lucene 3.6 providing searching service. my data is > not very large, raw data is less that 1GB and I want to use load all > indexes into memory. also I need save all indexes into disk > persistently. > I originally want to use RAMDirectory. But when I read its javadoc.
