Does Continuous crawl start a new crawl on each uploaded document while uploading multiple documents at the same time?

Question

Reading Exam Ref 70-332: Advanced Solutions of Microsoft SharePoint Server 2013, I made the following finding:

Enabling continuous crawling means that search results can appear before a crawl is completed because adding a document starts a new crawl that might finish before the first crawl. A user can add a document and have it appear in the search results within seconds of it being added, which can greatly improve the end-user experience and help users find the most current information as soon as possible.

However, it doesn’t say what happens when multiple documents are uploaded at the same time in a “bulk upload”, which has a default maximum of 100 documents. I don’t want 100 simultaneous crawls running in parallel when multiple documents are uploaded. Nevertheless, I’m not sure this doesn’t happen.

Does Continuous crawl start a new crawl on each uploaded document while uploading multiple documents at the same time?

Answer 1

No, it does not. The continuous crawl has a delay of 15-20 minutes before it starts and will add items that has been added since the full crawl was started.

http://social.technet.microsoft.com/wiki/contents/articles/15571.sharepoint-2013-continuous-crawl-and-the-difference-between-incremental-and-continuous-crawl.aspx

Answer 2

Editing my answer because apparently i missunderstood:

The new default search is the 2010 FAST search, when you upload a file or files in bulk then the event receiver should send those files into a queue which will then be handled by the Continuous crawler. So in effect my previous answer has been wrong/errornous (sorry just human here :D)

You can and probably will have multiple Crawlers running at the same time if the content is sufficiently large, but the search has been changed radically from my understanding. You will also notice that if you enable continuous crawling for new content then the incremental search crawler will become deactivated.