Apache Solr Reference Guide Covering Apache Solr 6.0

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under /solr, you can put /solr on the end of your ZK_HOST connection string, such as: ZK_HOST=zk1,zk2,zk3/solr Before using a chroot for the first time, you need to create the root path (znode) in ZooKeeper by using the zkcl i.sh script. We can use the makepath command for that: $ server/scripts/cloud-scripts/zkcli.sh -zkhost zk1,zk2,zk3 -cmd makepath /solr If you also want to bootstrap ZooKeeper with existing solr_home, you can instead use use zkcli.sh / zkcli.bat's bootstrap command, which will also create the chroot path if it does not exist. See Com mand Line Utilities for more info. Solr Hostname Use the SOLR_HOST variable in the include file to set the hostname of the Solr server. SOLR_HOST=solr1.example.com Setting the hostname of the Solr server is recommended, especially when running in SolrCloud mode, as this determines the address of the node when it registers with ZooKeeper. Override settings in solrconfig.xml Solr allows configuration properties to be overridden using Java system properties passed at startup using the - Dproperty=value syntax. For instance, in solrconfig.xml, the default auto soft commit settings are set to: ${solr.autoSoftCommit.maxTime:-1} In general, whenever you see a property in a Solr configuration file that uses the ${solr.PROPERTY:DEFAULT _VALUE} syntax, then you know it can be overridden using a Java system property. For instance, to set the maxTime for soft-commits to be 10 seconds, then you can start Solr with -Dsolr.autoSoftCommit.maxTime =10000, such as: $ bin/solr start -Dsolr.autoSoftCommit.maxTime=10000 The bin/solr script simply passes options starting with -D on to the JVM during startup. For running in production, we recommend setting these properties in the SOLR_OPTS variable defined in the include file. Keeping with our soft-commit example, in /etc/default/solr.in.sh, you would do: SOLR_OPTS="$SOLR_OPTS -Dsolr.autoSoftCommit.maxTime=10000" Enable Remote JMX Access If you need to attach a JMX-enabled Java profiling tool, such as JConsole or VisualVM, to a remote Solr server, then you need to enable remote JMX access when starting the Solr server. Simply change the ENABLE_REMOTE Apache Solr Reference Guide 6.0 508
_JMX_OPTS property in the include file to true. You’ll also need to choose a port for the JMX RMI connector to bind to, such as 18983. For example, if your Solr include script sets: ENABLE_REMOTE_JMX_OPTS=true RMI_PORT=18983 The JMX RMI connector will allow Java profiling tools to attach to port 18983. When enabled, the following properties are passed to the JVM when starting Solr: -Dcom.sun.management.jmxremote \ -Dcom.sun.management.jmxremote.local.only=false \ -Dcom.sun.management.jmxremote.ssl=false \ -Dcom.sun.management.jmxremote.authenticate=false \ -Dcom.sun.management.jmxremote.port=18983 \ -Dcom.sun.management.jmxremote.rmi.port=18983 We don’t recommend enabling remote JMX access in production, but it can sometimes be useful when doing performance and user-acceptance testing prior to going into production. Running multiple Solr nodes per host The bin/solr script is capable of running multiple instances on one machine, but for a typical installation, this is not a recommended setup. Extra CPU and memory resources are required for each additional instance. A single instance is easily capable of handling multiple indexes. When to ignore the recommendation For every recommendation, there are exceptions, particularly when discussing extreme scalability. The best reason for running multiple Solr nodes on one host is decreasing the need for extremely large heaps. When the Java heap gets very large, it can result in extremely long garbage collection pauses, even with the GC tuning that the startup script provides by default. The exact point at which the heap is considered "very large" will vary depending on how Solr is used. This means that there is no hard number that can be given as a threshold, but if your heap is reaching the neighborhood of 16 to 32 gigabytes, it might be time to consider splitting nodes. Ideally this would mean more machines, but budget constraints might make that impossible. There is another issue once the heap reaches 32GB. Below 32GB, Java is able to use compressed pointers, but above that point, larger pointers are required, which uses more memory and slows down the JVM. Because of the potential garbage collection issues and the particular issues that happen at 32GB, if a single instance would require a 64GB heap, performance is likely to improve greatly if the machine is set up with two nodes that each have a 31GB heap. If your use case requires multiple instances, at a minimum you will need unique Solr home directories for each node you want to run; ideally, each home should be on a different physical disk so that multiple Solr nodes don’t have to compete with each other when accessing files on disk. Having different Solr home directories implies that you’ll need a different include file for each node. Moreover, if using the /etc/init.d/solr script to control Solr as a service, then you’ll need a separate script for each node. The easiest approach is to use the service installation script to add multiple services on the same host, such as: $ sudo bash ./install_solr_service.sh solr-X.Y.Z.tgz -s solr2 -p 8984 Apache Solr Reference Guide 6.0 509
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TM Apache Solr Reference Guide Cove
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About This Guide This guide describ
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Getting Started Solr makes it easy
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Start Solr in the Foreground Since
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documents. Do not worry too much ab
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,price Faceted browsing is one of S
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for the simplest keyword searching
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Stop Informational Version Status H
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-noprompt Start Solr and suppress a
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The stop command sends a STOP reque
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$ bin/solr healthcheck -c gettingst
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collection. For example, the follow
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An example of this command with the
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with the fact that DocValues do not
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Accessing the URL http://hostname:8
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For an explanation of the various l
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Java Properties The Java Properties
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The collection-specific UI screens
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This screen also lets you adjust va
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Related Topics Uploading Data with
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Request-handler (qt) Specifies the
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about the core, and a secondary men
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0 13 {!lucene}*:* false _text_ 10
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This information may be useful for
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In the Solr universe, documents are
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The first line in the
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omitNorms If true, omits the norms
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TrieField TrieFloatField TrieIntFie
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Working with Dates Date Formatting
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UTC: http://localhost:8983/solr/my_
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Working with External Files and Pro
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str Stored string value of a field.
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1 one two three version: 1 stored:
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faceting 5 true 7 true 7 add multip
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useDocValuesAsStored If the field h
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Similarity Similarity is a Lucene c
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Multiple Commands in a Single POST
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Add a Dynamic Field Rule The add-dy
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The replace-field-type command repl
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Finally, repeated commands can be s
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81 Apache Solr Reference Guide 6.0
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id ... List Fields GET
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INPUT Path Parameters Key Descripti
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The query parameters can be added t
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Key collection Description The coll
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curl http://localhost:8983/solr/get
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OUTPUT Output Content The output wi
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Handling text properly will make yo
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Retrieving DocValues During Search
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true managed-schema Define an Upda
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Javadocs for update processor facto
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400 7 ERROR: [doc=19F] Error add
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Analyzers An analyzer examines the
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About Tokenizers The
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You configure the tokenizer for a t
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In: "Please, email john.doe@foo.c
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In: "babaloo" Out:"ba", "bab", "b
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Extract simple, capitalized words.
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lement. For example: The foll
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Example: Classic Filter This f
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Tokenizer to Filter: "four"(1), "sc
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In: "the quick brown fox jumped
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name: (string) The name of the norm
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appropriate for English language te
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N-Gram Filter Generates n-gram toke
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In: "cat concatenate catycat" To
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In: "jump jumping jumped" Tokenizer
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In: "To be, or not to be." Token
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enablePositionIncrements: if lucene
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couch,sofa,divan teh => the huge,gi
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useWhitelist: If true, the file def
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Tokenizer to Filter: "XL-4000/ES"(1
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The table below presents examples o
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KeywordRepeatFilterFactory Emits ea
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Using a Tailored ruleset: custom: (
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get the default rules for Germany /
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Language-Specific Factories Thes
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Arguments: language: (required) ste
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Out: "preziden", "preziden", "prezi
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Examples: In: "le chat,
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Example: Indonesian Solr incl
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Japanese Tokenizer Tokenizer for Ja
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In: "tirgiem tirgus" Tokenize
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Polish Solr provides support fo
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Factory class: solr.RussianLightSte
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Spanish Solr includes two stemmers
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Algorithms discussed in this sectio
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Caverphone To use this encoding in
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The " text_general" field type is d
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Indexing and Basic Data Operations
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$ bin/post -h Usage: post -c [OPTI
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The bin/post script currently deleg
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XML Update Commands Commit and Opti
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In general, the JSON update syntax
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if split=/ (i.e., you want your JSO
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curl 'http://localhost:8983/solr/my
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So, if no params are passed, the en
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Path /update/csv Default Parameters
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Topics covered in this section: Key
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defaultField extractOnly extractFor
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EEEE, dd-MMM-yy HH:mm:ss zzz EEE MM
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curl "http://localhost:8983/solr/te
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Configuration Configuring solrconfi
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Datasources can still be specifie
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dateFormat A java.text.SimpleDateFo
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The URLDataSource type accepts thes
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deletedPkQuery deltaImportQuery SQL
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The entity attributes unique to the
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onError By default, the TikaEntityP
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While there are use cases where you
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The HTMLStripTransformer You can us
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The emailids field in the table can
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set Modifier Usage Set or replace t
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$ curl -X POST -H 'Content-Type: ap
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Method MD5Signature Lookup3Signatur
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language identification and a field
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langid.fallbackFields string none n
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1. Copy solr-uima-VERSION.jar (unde
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VALID_ALCHEMYAPI_KEY is your Alch
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Overview of Searching in Solr Solr
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Velocity Search UI Solr includes a
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The table below summarizes Solr's c
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Setting the start parameter to some
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The debug Parameter The debug param
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The echoParams Parameter The echoPa
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The Standard Query Parser's Respons
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Multiple characters (matches zero o
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field. For example, suppose an inde
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Grouping Terms to Form Sub-Queries
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In addition to the common request p
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If the calculations based on the pa
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http://localhost:8983/solr/techprod
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Examples of Queries Submitted to th
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it includes parentheses. For exampl
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dist docfreq(field,val) exists fiel
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max maxdoc min ms norm( field) not
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ecip rord scale sqedist Performs a
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tf top totaltermfreq xor() Term fre
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is equivalent to: q={!type=dismax q
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This parser takes a query that matc
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ds.txt for your collection, and ind
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One way to model this graph as Solr
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With this alternative document mode
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y wrapping all SHOULD clauses in a
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Re-Ranking Query Parser The ReRankQ
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example configuration below, client
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TermsQueryBuilder UserInputQueryB
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The facet.field parameter identifie
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The default value is fc (except for
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The facet.range.hardend parameter i
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Using the " bin/solr -e techproduct
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"price":{ "min":479.95001220703125,
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307 Apache Solr Reference Guide 6.0
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... "start":"2006-01-01T00:00:00Z",
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and exclude those filters when face
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document sample 1 parent 11 Red
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Standard Highlighter The standard h
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hl.usePhraseHighlighter true If set
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hl.maxMultiValuedToExamine integer.
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Related Content HighlightingParamet
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hl.score.b 0.75 Specifies BM25 leng
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Levenshtein metric, which is the sa
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spellcheck Turns on or off SpellChe
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The spellcheck.alternativeTermCount
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1 0 5 0 dell 1 1 6 17 0 u
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Transforming Result Documents Docum
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childFilter - query to filter which
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name lookupImpl dictionaryImpl A sy
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allTermsRequired: Boolean option fo
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This dictionary implementation take
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Example query: http://localhost:898
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solrconfig.xml mySuggester Analyz
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paging, and filtering using common
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Fetching A Large Number of Sorted R
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$ curl '...&rows=10&sort=id+asc&cur
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The psuedo-code for tailing a curso
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group.facet Boolean Determines whet
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The Collapsing query parser and the
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q=foo&fq={!collapse field=ISBN}&exp
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To enable the clustering component
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There were a few clusters discover
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clustering When true, clustering co
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The default language can also be se
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See the section SpatialRecursivePre
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sphere; and sqedist, to calculate t
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maxDistErr worldBounds Defines the
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interface being developed allows an
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The parameters below allow you to c
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0 2 5 3 3 3 3 3 3 3 3 3 Get
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The TermVectorComponent is a search
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Boolean Parameters Description Type
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0.0 3.0 32 0 10.0 22.0 0.3125 0.7
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Additional "Expert" local params ar
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config-file Path to the file that d
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csv json php phps python ruby smile
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text/plain Python Response Writer
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v.layout.enabled v.contentType v.js
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maxDocs maxTime Integer. Defines th
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${solr.ulog.dir:} Real Time Get re
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To export the full sorted result se
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Some streaming functions act as str
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expr=search(collection1, zkHost="lo
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facet(collection1, q="*:*", buckets
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Parameters Syntax StreamExpression
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-1, // checkpoint every X tuples, i
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The order of the streams does not m
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intersect( search(collection1, q=a_
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outerHashJoin( search(people, q=*:*
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Parameters Syntax StreamExpression
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unique( search(collection1, q="*:*"
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worker nodes. It involves sorting a
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{"result-set":{"docs":[ {"count(*)"
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engine and are generated by the Sta
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the Data Tables. The worker nodes e
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The Well-Configured Solr Instance T
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#core.properties name=collection2 m
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Managed Schema Default When a is n
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Merging Index Segments mergePolicyF
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lockType The LockFactory options sp
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own request handler, you should mak
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used instead of the default. First-
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We've defined three paths with this
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1000 commitWithin The commitWithin
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accessed frequently tend to stay in
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the filterCache will be checked for
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Page 465 and 466: stripping index.html), the domain a
Page 467 and 468: In Solr, the term core is used to r
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Page 471 and 472: name=my_core_name Placement of core
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Page 475 and 476: RELOAD The RELOAD action loads a ne
Page 477 and 478: In this example, we use the indexDi
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Page 483 and 484: Commands for Common Properties The
Page 485 and 486: The Config API does not let you cre
Page 487 and 488: Examples Creating and Updating Comm
Page 489 and 490: {"overlay":{ "znodeVersion":5, "use
Page 491 and 492: curl http://localhost:8983/solr/tec
Page 493 and 494: Managed Resources Managed resources
Page 495 and 496: Synonyms For the most part, the API
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Page 499 and 500: curl http://localhost:8983/solr/tec
Page 501 and 502: the signature of the jar that you g
Page 503 and 504: Managing Solr This section describe
Page 505 and 506: and runs Solr as the solr user. Con
Page 507: Solr process PID running on port 89
Page 511 and 512: security.json { } "authentication"
Page 513 and 514: during initialization. The authoriz
Page 515 and 516: curl --user solr:SolrRocks http://l
Page 517 and 518: Consult Your Kerberos Admins! Befor
Page 519 and 520: If you already have a /security.jso
Page 521 and 522: in/solr -c -z server1:2181,server2:
Page 523 and 524: st Parameters API, and other APIs w
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Page 527 and 528: in/solr.in.sh example SOLR_SSL_* co
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Page 533 and 534: SolrCloud Instances In SolrCloud mo
Page 535 and 536: authentication from Solr, you need
Page 537 and 538: The backup command is an asynchrono
Page 539 and 540: In addition to the logging options
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Page 543 and 544: MBean Request Handler The MBean Req
Page 545 and 546: SolrCloud Example Interactive Start
Page 547 and 548: startup a SolrCloud cluster using t
Page 549 and 550: Then at query time, you include the
Page 551 and 552: http://localhost:8983/solr/gettings
Page 553 and 554: Each shard serves top-level query r
Page 555 and 556: Write Side Fault Tolerance SolrClou
Page 557 and 558: Create the instance Creating the in
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Finally, create your myid files in
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Changing ACL Schemes Example Usages
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When solr wants to create a new zno
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set SOLR_ZK_CREDS_AND_ACLS=-DzkDige
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maxShardsPerNode integer No 1 When
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It's possible to edit multiple attr
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Query Parameters Key Type Required
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Create a Shard Shards can only crea
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The CREATEALIAS action will create
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0 603 0 19 0 67 Delete
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http://localhost:8983/solr/admin/co
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The response will include the statu
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0 5007 0 8 0 1 test2_shard
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Key Type Required Description role
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Cluster Status /admin/collections?a
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} } "127.0.1.1:8900_solr"] Request
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0 9 Examining the clusterstate a
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0 123 success Already leader 19
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-z -zkhost -c -collection -d -con
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... ${solr.data.dir:} ... 3. The
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will explain why the request failed
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The nodes are sorted first and the
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Defining Rules Rules are specified
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Updates and deletes are first writt
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Rely on two storages: an ephemeral
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Target Configuration Here is a typi
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core/cdcr?action=QUEUES: Fetches st
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Output { } "responseHeader": { "sta
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{ } responseHeader={ status=0, QTim
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http://localhost:898 ${TargetZk}
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Legacy Scaling and Distribution Thi
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Limitations to Distributed Search D
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0 8 *:* localhost:8983/solr/core1
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Master and Slave Update Optimizatio
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http://remote_host:port/solr/core
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A commit command is issued on the s
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is a large expense, but not nearly
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Apache Solr Reference Guide 6.0 639
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The Solr Wiki contains a list of cl
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pSolrClient , or CloudSolrClient .
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upload using binary format, which i
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}} 'manufacturedate_dt'=>'2005-10-1
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Solr Glossary Where possible, terms
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Literally, N data about data. Metad
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See also #Inverse document frequenc
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A new graph query parser makes it p
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Upgrading a Solr Cluster This page
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proceeding to upgrade the next node
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