Re-indexing SOLR document

I hav开发者_开发问答e one file named item.csv, which contains around 100 products for now and it is indexed using SOLR.My requirements is if I add more data around 10 to 100 products on daily basis, do I need to re-index the whole document daily,or does SOLR support indexing only those new data?

Can anyone please clarify my question.

Thanks in advance.

Yes, you can just add new documents to the index without having to rebuild the whole index.

If you mean appending data to (or updating) an existing document, then yes, you have to rebuild that document.