Thanks Robert; that's very helpful.
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Author: http://www.packtpub.com/apache-solr-3-enterprise-search-server/book
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The underlying data formats are different. For example, because
Lucene42Codec will load terms into RAM, it uses an FST. But DiskDV
uses a more simplistic storage for the terms thats more suitable for
being disk-resident.
There are also different compression block sizes and so on in use.
you can p
