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From Erick Erickson <erickerick...@gmail.com>
Subject Re: SOLR Upgrade 3.x to 4.10
Date Tue, 12 Apr 2016 23:36:45 GMT
I would always re-index if possible, it's more certain than upgrading
the indexes. It's "not possible" when it takes very long....

And why go for 4.10 rather than 5.5 (Note, 5.5.1 will be out Real Soon
Now). If you can re-index, I'd really think about upgrading to 5.5.1
and going from there.

Best,
Erick

On Tue, Apr 12, 2016 at 5:10 AM, abhi Abhishek <abhi26691@gmail.com> wrote:
> 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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