Re: Index in RAM - is it realy worthy?

[Kevin A. Burton]

Otis Gospodnetic wrote:
For the Lucene book I wrote some test cases that compare FSDirectory
and RAMDirectory.  What I found was that with certain settings
FSDirectory was almost as fast as RAMDirectory.  Personally, I would
push FSDirectory and hope that the OS and the Filesystem do their share
of work and caching for me before looking for ways to optimize my code.
 

Also another note is that doing an index merge in memory is probably 
faster if you just use a RAMDirectory and perform addIndexes to it.

This would almost certainly be faster than optimizing on disk but I 
haven't benchmarked it.

Kevin
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