Hi All,
    I have SOLR 3.6 running currently, i am planning to upgrade this to
SOLR 4.10. Below were the thoughts we could come up with.

1. in place upgrade
       I would be making the SOLR 4.10 slave of 3.6 and copy the indexes,
and optimize this index.

      will optimizing the Lucene 3.3 index on SOLR 4 instance(with Lucene
4.10) change the index structure to Lucene 4.10? if not what would be the
version?
      if i enable docvalues on certain fields before issuing optimize, will
it be able to incorporate ( create .dvd & .dvm files ) that in the newly
created index?


2. Re-Index the data

Seeking advice for minimum time to upgrade this with most features of SOLR
4.10

Thanks in Advance

Best Regards,
Abhishek

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