Thanks for you reply.

We are still using Lucene v1.4.3 and I'm not sure if upgrading is an option. Is 
there another way of disabling length normalization/document boosts to get rid 
of those files?

Thanks,
Rico

: >From what I read in the Lucene docs, these .f<m> files store the
: normalization factor for the corresponding field. What exactly is this
: used for and more importantly, can this be disabled so that the files
: are not created in the first place?

field norms are primarily used for length normalization, but they also
store field and document boosts ... more info can be found in the scoring
and Similarity docs.

if you don't care about these things, there is an omitNorms option on the
Field class that can be used to not only reduce the number of open
files you need, but also make your index smaller on disk, and reduce your
memory usage. (i believe it was added in 1.9)



-Hoss

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