1) "_version_" is not "unecessary", actually the contrary, it is fundamendal
for Solr to work.
The same for types you use across your field definitions.
There was a time you could see these comments in the schema.xml (doesn't
seem the case anymore):
<field name="_version_" type="long" indexed="true" stored="true"/>
<field name="_root_" type="string" indexed="true" stored="false"/>
<field name="id" type="string" indexed="true" stored="true"
required="true" multiValued="false" />
2) https://lucene.apache.org/solr/guide/6_6/schema-api.html , yes you can
3)Unless your files are local to the process you will use to push them to
Solr, you will have "two times traffic" indipendently of the client
technology.
Cheers
[1]
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Alessandro Benedetti
Search Consultant, R&D Software Engineer, Director
Sease Ltd. - www.sease.io
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Sent from: http://lucene.472066.n3.nabble.com/Solr-User-f472068.html
