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Alfresco Search Internals

The document provides an overview of Alfresco's search internals, focusing on full-text search (FTS), CMIS query language, and data modeling options. It discusses configuration settings, authorization filters, and various query support methods including Lucene-based queries and database integration. Challenges such as query language abstraction and consistency in clustered environments are also highlighted.

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Alfresco Search Internals0Andy HindSenior Developer, Alfrescotwitter: @andy_hind
Agenda1 Overview
Direction
Challenges
Alfresco FTS
CMIS Query LanguageOverview2Data Modelling Options<property name="cmis:name">... <type>d:text</type>... <index enabled="true"> <tokenised>both</tokenised><atomic>true</atomic> <stored>false</stored> </index>....</property>
Overview3Data Modelling Options<property name="cmis:name">... <type>d:text</type>... <index enabled="true"> <tokenised>both</tokenised><atomic>true</atomic> <stored>false</stored> </index>....</property>Type drives analysis
Overview4Data Modelling Options<property name="cmis:name">... <type>d:text</type>... <index enabled="true"> <tokenised>both</tokenised><atomic>true</atomic> <stored>false</stored> </index>....</property>truefalse
Overview5Data Modelling Options<property name="cmis:name">... <type>d:text</type>... <index enabled="true"> <tokenised>both</tokenised><atomic>true</atomic> <stored>false</stored> </index>....</property>truefalseboth
Overview6Data Modelling Options<property name="cmis:name">... <type>d:text</type>... <index enabled="true"> <tokenised>both</tokenised><atomic>true</atomic> <stored>false</stored> </index>....</property>truefalse(d:content)
Overview7Data Modelling Options<property name="cmis:name">... <type>d:text</type>... <index enabled="true"> <tokenised>both</tokenised><atomic>true</atomic> <stored>false</stored> </index>....</property>truefalse
Overview8ConfigurationIndexerAndSearcher interface and related factory
Redirection by store protocol or value
Factories
AVM
DM
Unindexed
All lucene based with options set via properties
Analysis by data type and locale
alfresco/model/dataTypeAnalyzers_{local}.propertiesOverview9Configuration <bean id="indexerAndSearcherFactory" class="org.alfresco.repo.service.StoreRedirectorProxyFactory"> <property name="proxyInterface"> <value>org.alfresco.repo.search.impl.lucene.LuceneIndexerAndSearcher</value> </property> <property name="defaultBinding"> <ref bean="admLuceneIndexerAndSearcherFactory"></ref> </property> <property name="redirectedProtocolBindings"> <map> <entry key="workspace"> <ref bean="admLuceneIndexerAndSearcherFactory"></ref> </entry> <entry key="avm"> <ref bean="avmLuceneIndexerAndSearcherFactory"></ref> </entry> </map> </property> <property name="redirectedStoreBindings"> <map> <entry key="workspace://lightWeightVersionStore"> <ref bean="admLuceneUnIndexedIndexerAndSearcherFactory"></ref> </entry> <entry key="workspace://version2Store"> <ref bean="admLuceneUnIndexedIndexerAndSearcherFactory"></ref> </entry> </map> </property> </bean>
Overview10Configuration propertieslucene.maxAtomicTransformationTime=20lucene.query.maxClauses=10000 lucene.indexer.cacheEnabled=truelucene.indexer.maxDocIdCacheSize=10000lucene.indexer.maxDocumentCacheSize=100lucene.indexer.maxParentCacheSize=10000lucene.indexer.maxIsCategoryCacheSize=-1lucene.indexer.maxLinkAspectCacheSize=10000lucene.indexer.maxPathCacheSize=10000lucene.indexer.maxTypeCacheSize=10000
Overview11Configuration propertieslucene.indexer.mergerTargetIndexCount=5lucene.indexer.mergerTargetOverlayCount=5lucene.indexer.mergerTargetOverlaysBlockingFactor=1lucene.indexer.mergerMergeBlockingFactor=1lucene.indexer.maxDocsForInMemoryMerge=10000lucene.indexer.maxRamInMbForInMemoryMerge=16lucene.indexer.postSortDateTime=true lucene.indexer.defaultMLIndexAnalysisMode=EXACT_LANGUAGE_AND_ALL lucene.indexer.defaultMLSearchAnalysisMode=EXACT_LANGUAGE_AND_ALL lucene.indexer.maxFieldLength=10000
Overview12Authorization Post query filter for READ
Configuration
system.acl.maxPermissionCheckTimeMillis=10000