SharePoint 2013. How to force whole list or library to be re-crawled by search
It is a new feature which was presented in SharePoint 2013
which allows to force search service to re-crawl whole list or library
regardless if items where changed or not. Items will be picked up by full crawl
any way but if will be marked for re-crawl they will be crawled also during
incremental crawl.
This feature is very useful when new managed property is
configured or site column is modified so as a result search schema needs to be
updated and list owner who initially has not access to central admin to fire
full crawl which will be very expensive step for large deployment and will
affect a lot of content.
So this cool feature can be found in list (I will not
mention library anymore) settings under Advanced
Settings link.

Scroll a little Advanced
Settings page and pay attention to Search
block where you can enable the list to appear in search results. This option
should be enabled otherwise Reindex
Document feature will not have any sense.

Only then you can press Reindex
Document Library or Reindex List
button

In popup dialog just confirm that you are sure and want to
re-index list.

Now your list will be picked up by next continuous or
incremental crawl. Make a note that you do not need to scroll down on Advanced Settings page and press OK, list already marked as dirty.
I am not sure if someone will need to make the same using PowerShell
or OM, but anyway drop a line in comment then we can discuss it.
Comments
http://blog.icsharp.net/2013/04/how-to-force-web-list-or-library-to-recrawl.html
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