Thanks for the clarification.
I use
<config>
<luceneMatchVersion>${lucene.version}</luceneMatchVersion>
in the solrconfig.xml and pass -Dlucene.version when I launch solr, to keep
the versions.
> On Oct 12, 2017, at 11:01 PM, Erick Erickson <erickerick...@gmail.com> wrote:
>
> You can use the IndexUpgradeTool that ships with each version of Solr
> (well, actually Lucene) to, well, upgrade your index. So you can use
> the IndexUpgradeTool that ships with 5x to upgrade from 4x. And the
> one that ships with 6x to upgrade from 5x. etc.
>
> That said, none of that is necessary _if_ you
>> have the Lucene version in solrconfig.xml be the one that corresponds to
>> your current Solr. I.e. a solrconfig for 6x should have a luceneMatchVersion
>> of 6something.
>> you update your index enough to rewrite all segments before moving to the
>> _next_ version. When Lucene sees merges a segment, it writes the new segment
>> according to the luceneMatchVersion in solrconfig.xml. So as long as you are
>> on a version long enough for all segments to be merged into new segments,
>> you don't have to worry.
>
> Best,
> Erick
>
> On Thu, Oct 12, 2017 at 8:29 PM, Harry Yoo <hyunat...@gmail.com> wrote:
>> I should have read this. My project has been running from apache solr 4.x,
>> and moved to 5.x and recently migrated to 6.6.1. Do you think solr will take
>> care of old version indexes as well? I wanted to make sure my indexes are
>> updated with 6.x lucence version so that it will be supported when i move to
>> solr 7.x
>>
>> Is there any best practice managing solr indexes?
>>
>> Harry
>>
>>> On Sep 22, 2015, at 8:21 PM, Walter Underwood <wun...@wunderwood.org> wrote:
>>>
>>> Don’t do anything. Solr will automatically clean up the deleted documents
>>> for you.
>>>
>>> wunder
>>> Walter Underwood
>>> wun...@wunderwood.org
>>> http://observer.wunderwood.org/ (my blog)
>>>
>>>
>>>> On Sep 22, 2015, at 6:01 PM, CrazyDiamond <crazy_diam...@mail.ru> wrote:
>>>>
>>>> my index is updating frequently and i need to remove unused documents from
>>>> index after update/reindex.
>>>> Optimizaion is very expensive so what should i do?
>>>>
>>>>
>>>>
>>>> --
>>>> View this message in context:
>>>> http://lucene.472066.n3.nabble.com/is-there-a-way-to-remove-deleted-documents-from-index-without-optimize-tp4230691.html
>>>> Sent from the Solr - User mailing list archive at Nabble.com.
>>>
>>
