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From Michael McCandless <>
Subject Re: do i need a key if not going to query by key or update the document
Date Mon, 12 Sep 2016 09:47:53 GMT
No, you don't need a key for append-only usage.

Lucene itself doesn't care if you have a unique key per document, and
in fact it's very costly, especially if your documents are otherwise
tiny, to add one if you don't really need it.

Mike McCandless

On Mon, Sep 12, 2016 at 5:42 AM, Cam Bazz <> wrote:
> Hello,
> Do I need to add a key, if I will not be
> a. updating the document
> b. will not fetch the document by key?
> What could be the possible downside of not using a key that uniquely
> identifies the document?
> I am building a log processor, and all I will do is sort and iterate.
> Best regards,
> C.

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