General

Companies currently using Search ADP, Australia Department of Defence, Bayer, Chevron, ConocoPhillips, Deloitte, Ford Motor Company, Green Mountain Coffee, Pfizer, Rio Tinto, The Procter & Gamble Company, U.S. Army, and the U.S. Department of Veterans Affairs. Reference BAInsight

2013

SharePoint Search 2013 - TechNet
https://blogs.technet.microsoft.com/tothesharepoint/tag/sharepoint-search-2013/

Problems Crawling the non-Default zone *Explained
https://blogs.msdn.microsoft.com/sharepoint_strategery/2014/07/08/problems-crawling-the-non-default-zone-explained/

Search Unleashed Series (Fast Search – SharePoint 2013)
Search Architecture with SharePoint 2013
Crawling content with Sharepoint 2013 Search
Notes on securing data with Sharepoint 2013 Search
How to tell that a Continuous Crawl is actually working
Certain types of Icons are not being displayed in search results with Sharepoint 2013

Compare Content Query Web Part vs. Content Search Web Part
https://support.office.com/en-us/article/When-to-use-the-Content-Query-Web-Part-or-the-Content-Search-Web-Part-in-SharePoint-346a0f48-38de-409b-8a58-3bdca1768929

Note that the number of threads in 2013 changes with the number of cores http://blogs.technet.com/b/searchguys/archive/2013/02/19/content-processing-performance-scaling.aspx

Also here is good diagram of overlap in continuous crawls
http://blogs.technet.com/b/tothesharepoint/archive/2012/09/14/how-can-i-achieve-the-best-freshness-of-search-results-introducing-continuous-crawls-for-sharepoint.aspx

Lowest value is one minute for continuous crawl
https://technet.microsoft.com/en-us/library/jj219802.aspx

Rock your Search Performance on SharePoint Dev Environments
http://social.technet.microsoft.com/wiki/contents/articles/24596.rock-your-search-performance-on-sharepoint-development-environments-in-10-steps.aspx

Running SharePoint 2013 search within a limited RAM footprint
http://reality-tech.com/2014/02/03/running-sharepoint-2013-search-within-a-limited-ram-footprint/

Performance Issues
http://platinumdogs.me/2014/01/07/controlling-search-noderunner-memory-usage-in-sharepoint-2013/

Custom entity extraction in SharePoint 2013
http://www.dotnetmafia.com/blogs/dotnettipoftheday/archive/2013/01/08/no-metadata-no-problem-custom-entity-extraction-in-sharepoint-2013.aspx

Troubleshooting Tool
https://sp2013searchtool.codeplex.com/

Foundation
http://technet.microsoft.com/en-us/library/sharepoint-online-search-service-description.aspx
https://www.nothingbutsharepoint.com/sites/itpro/pages/search-in-sharepoint-2013-foundation-versus-full-blown-server.aspx

Reset Index from Microsoft

Solution

To solve the issue follow these steps:

Stop the Timer Service
Clear the configuration cache
1. Find in \ProgramData\Microsoft\SharePoint\Config the folder where the file cache.ini exists
2. Delete every file from this folder EXCEPT cache.ini
3. Open cache.ini, delete the content and put ’1′ (without the quotes) in it and save the file
Restart the Timer Service
Index reset
Full crawl

https://blogs.msdn.microsoft.com/jamesway/2011/05/23/sharepoint-2010-clearing-the-configuration-cache/

Reset Index Additional Reference http://www.itidea.nl/index.php/search-has-encountered-a-problem-that-prevents-results-from-being-returned/

Export/Import Managed Properties via Powershell
http://blog.riccardocelesti.it/exportimport-managed-properties-via-powershell/

Check these TechNet articles:

Good article on intro to ….
http://blogs.msdn.com/b/russmax/archive/2013/06/06/search-2013-search-architecture-part-1-intro.aspx

Test Lab Guide: Configure a highly available SharePoint Server 2013 Search topology
http://technet.microsoft.com/en-us/library/dn271768.aspx

Changes from SharePoint 2010 to SharePoint 2013
http://technet.microsoft.com/en-us/library/ff607742(v=office.15)#section4

FAST Search Server 2010 for SharePoint deprecated features
http://technet.microsoft.com/en-us/library/ff607742(v=office.15)

Search technical reference for SharePoint Server 2013
http://technet.microsoft.com/en-us/library/jj219574(v=office.15).aspx

Administer search in SharePoint Server 2013
http://technet.microsoft.com/en-us/library/ee792877(v=office.15).aspx

Architectures - Download
http://www.microsoft.com/en-us/download/details.aspx?id=30383
http://www.microsoft.com/en-us/download/details.aspx?id=30464

Scale Search Performance
http://technet.microsoft.com/en-us/library/jj219628.aspx
http://social.technet.microsoft.com/wiki/contents/articles/16002.sharepoint-2013-capacity-planning-sizing-and-high-availability-for-search-in-spc172.aspx

More Articles from the web:

Great articles from BAInsight.
http://www.bainsight.com/pages/sharepoint-search-2013.aspx

SharePoint 2013 Search – FAST Integration
http://www.matdesmarais.com/2012/07/sharepoint-2013-search-fast-integration/

What happens with FAST in SharePoint 2013
http://nbsharepointtalk.blogspot.se/2012/07/whats-new-within-sharepoint-2013-search_24.html

Check out more cool new features in SharePoint 2013
http://www.surfray.com/blog/2012/07/16/new-features-in-sharepoint-2013/

Document Preview
http://www.surfray.com/blog/2012/07/16/document-preview-in-sharepoint-2013/

SEO is built in 2013
http://blog.mastykarz.nl/search-engine-optimization-sharepoint-2013/

Strange search results in Office 365

The first line in the file was my title … not the name of the file … but what is title in your organization? Is title the filename or a special title column. No problem since search was engineered to solve this issue.