Tuesday, 31 May 2011

FAST Search Overview

Overview:  Researching FAST for SharePoint 2010 Enterprise, I am logging my findings to provide a basic overview for using FAST with SP2010.

FAST for SP2010 OOTB Search Results

  • Install FAST on it's own Hardware x64 Windows 2008 R2, need 4GB RAM and 4CPU's min should use 16GB RAM and 8 CPU's;
  • Min disk 50GB, 1TB with multiple spindles recommended;
  • Install FAST on seperate Hw (not on SP2010 or DC machines);
  • Neeed Internet access port 80 and IP adress should be static;
  • FAST need SP2010 Enterprise Edition;
  • SP2010 search must be installed it is still used for the People search results;
  • FAST uses a db for configuration of FAST so back-off your existing SQL Server farm used by SP2010;
  • The indexed data out of the content databases is stored in FAST indexes on the file system not in the SQL Server db;
Technical Overview:
Main components are: Crawler (examines the data to be made searchable), Web Analyser and Indexer (performs the search queries).

Crawler servers maximum of 30 million docs per node (server), crawler produces 2 databases. Sizing is roughly 3GB per million docs in the log file and 4GB per million docs in content.

Web Analyser servers has a maximum recommendation of 30 million per node. Storage of 5GB per million docs.

Indexer servers the queries back and recommend staying under 15 million docs per node. Need roughly 120GB/million documents crawled. Due to the high IOPS required by the index servers it best to keep these as physical servers. VMWare experts and tune VM’s for high IOPS but a specialist is highly recommended.

Licensing is done per server or VM and is roughly 14K/server/VM (Not verified)

People search is still surfaced using SP2010 Search so don’t remove it from the SP2010 farm. I believe you can use FAST to do people search also but it doesn’t support phonetic searches so probably a good idea to leave people search with SharePoint’s enterprise search.

Virtualization: Don’t virtualize the SQL Server, use a SAN. Don’t virtualize the Indexer servers.

Advantages of FAST:

• Higher performance and scalability

• Facetted searches are provided OOTB

• Improved meta data extractors

• Previews and thumb previews for PowerPoint, word and pdf documents

• Federation has exact number counts (I love this)

• Programmatic hook into the content publishing pipeline

Setting up FAST for SP2010 on a devloper VM  This is based on articles on technet about FAST for SP2010 and is not my original work, it has been addapted to my specific requiremnt for FAST on a development VM.

Simple Logical Architecture http://www.social-point.com/sharepoint-2010-search-and-fast-search

FAST for SharePoint 2010 Troubleshooting

1.> Check FAST servers are running.  PS>nctrl status
2.> Ensure OSearch14 Windows service is running as 1 of the 2 FAST installed specified accounts 
3.> Check the Certificate Connection using PS (SharePoint)> Ping-SPEnterpriseSearchContentService -HostName FS4SP1.demo.dev:13391

PS> Restart-Service -Name "OSearch14"
4.> Authorisation crawl errors.  Check the account that is performing the crawl has permissions

  • FAST logs are found in <>\FastSearch\var\log
  • \syslog\all.log is the best log for fault finding.
  • \querylogs shows all the logs for queries
  • Use Perfmon to monitor FAST, fast has it's own set of counters. 


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