Loading...
 

Unified Index Comparison

The Search and List from Unified Index has support for multiple engines. While all of them offer the same functionality and connect to various functionality such as the content search, PluginList, PluginCustomSearch and various others, they will have different performance characteristics and some may offer additional features.

As a general rule, the engine can simply be switched and the index rebuilt without any additional change to the configuration.

Overview


The unified index engines are:

  • MariaDB/MySQL Full Text Search (is the default for 12.x onwards)
    • introduced in Tiki12
    • Within MariaDB/MySQL, additional memory required
    • Fast indexing (can be 10 times faster than Zend_Search_Lucene), slower/unstable query speed
    • No configuration required
    • Not customizable
  • Elasticsearch
    • introduced in Tiki12
    • Independent Java server(s), horizontally scalable
    • Feature-rich
    • Fast indexing, fast/stable query speed, decent/good results
    • Typically, Elasticsearch is set up as a cluster on different servers than Tiki (or using a third-party service), but it is also possible to install on the same server.
    • Customizable
  • Manticore Search, new in Tiki25
    • Feature-rich
    • Very fast
    • Written in C++
    • Customizable
    • Can be set up as a cluster
    • Requires small amounts of RAM (compared to Elasticsearch)
    • This is the default setup for WikiSuite once Tiki25 is released, and it is an option of the installer.


The system is designed for maintaining an autonomy vis à vis the engines. So more can be added later. No long-term data is stored in the indexes and it's fairly easy to switch from one to another. The next logical addition is OpenSearch. Please contact Marc Laporte if you have specific needs.

Limitations

The MySQL implementation has several limitations:

  • Words with 3 or less characters will not be indexed unless the MySQL server configuration is modified.
  • MySQL comes with an extensive list of English stop words, preventing many queries from working.
  • MySQL can use a single index at a time. Depending on the query, performance can vary significantly.
  • MySQL has several limitations on the number of columns and indexes it can contain. Complex sites with many different query patterns may hit those limitations.
  • No support for field boosting, such as providing more relevance for hits on the title.
  • There is a limitation on the number of tracker fields. The limitation is quite high (2000+), but when you hit it, you need to move to another engine because MySQL/MariaDB has a hard limit. It is not possible to know in advance the precise number of maximum fields because some tracker field types require more than one MySQL column.
    • It is possible to exclude some fields from the index to stay within the limit.


Elasticsearch requires a dedicated environment to be installed and works better with multiple instances running. It does not have known limitations.

Extra features

Selection guidelines

Tiki 24 and before

  • Small sites, simple functionality: MariaDB/MySQL Full Text Search
  • Medium or large sites, advanced functionality: Elasticsearch

Tiki 25 and up

  • Small sites, simple functionality: MySQL Full Text Search
  • If you are already using Elasticsearch and are happy with it: Elasticsearch
  • Medium or large sites, advanced functionality: Manticore

Differences of results between engines

A tool has been created to compare the results, and make sure all is OK: https://gitlab.com/tikiwiki/tiki/-/merge_requests/940/

Legacy

Zend_Search_Lucene (PHP Implementation) was introduced in Tiki7 and later removed Last version: Tiki21.

alias

doc.tiki.org

Get Started

Admin Guide User Guide Bootstrap in Tiki

Keywords

Keywords serve as "hubs" for navigation within the Tiki documentation. They correspond to development keywords (bug reports and feature requests):

Accessibility (WAI and 508)
Accounting
Articles and Submissions
Backlinks
Banners
Batch
BigBlueButton audio/video/chat/screensharing
Blog
Bookmark
Browser Compatibility
Link Cache
Calendar
Category
Chat
Clean URLs
Comments
Communication Center
Compression (gzip)
Contacts (Address Book)
Contact us
Content Templates
Contribution
Cookie
Copyright
Credit
Custom Home and Group Home Page
Date and Time
Debugger Console
Directory of hyperlinks
Documentation link from Tiki to doc.tiki.org (Help System)
Docs
Draw
Dynamic Content
Dynamic Variable
External Authentication
FAQ
Featured links
File Gallery
Forum
Friendship Network (Community)
Gmap Google maps
Groups
Hotword
HTML Page
i18n (Multilingual, l10n, Babelfish)
Image Gallery
Import-Export
Install
Integrator
Interoperability
Inter-User Messages
InterTiki
Kaltura video management
Karma
Live Support
Login
Logs (system & action)
Look and Feel
Mail-in
Map with Mapserver
Menu
Meta Elements
Mobile Tiki and Voice Tiki
Mods
Module
MultiTiki
MyTiki
Newsletter
Notepad
Payment
Performance Speed / Load
Permissions
Platform independence (Linux-Apache, Windows/IIS, Mac, BSD)
Polls
Profiles
Profile Manager
Report
Toolbar
Quiz
Rating
Feeds
Score
Search engine optimization
Search
Search and Replace
Security
Semantic links
Shadowbox
Shadow Layers
Share
Shopping cart
Shoutbox
Slideshow
Smiley
Social Networks
Spam protection (Anti-bot CATPCHA)
Spellcheck
Spreadsheet
Stats
Surveys
Tags
Task
Tell a Friend, alert + Social Bookmarking
TikiTests
Theme CSS & Smarty
Tiki Manager
Trackers
Transitions
User Administration including registration and banning
User Files
User Menu
Watch
WebDAV
Webmail
Web Services
Wiki History, page rename, etc
Wiki Syntax
Wiki structure (book and table of content)
Workspace
WSOD
WYSIWYCA
WYSIWYG
XMLRPC

Tiki Newsletter

Delivered fresh to your email inbox!
Newsletter subscribe icon
Don't miss major announcements and other news!
Contribute to Tiki