Apache Solr Reference Guide Covering Apache Solr 6.0

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The Log Level Menu. Directories are shown with their current logging levels. The Log Level Menu floats over these. To set a log level for a particular directory, select it and click the appropriate log level button. Log levels settings are as follows: Level Result FINEST FINE CONFIG INFO WARN SEVERE OFF UNSET Reports everything. Reports everything but the least important messages. Reports configuration errors. Reports everything but normal status. Reports all warnings. Reports only the most severe warnings. Turns off logging. Removes the previous log setting. Multiple settings at one time are allowed. Permanent Logging Settings Solr uses Log4J version 1.2 for logging and is configured using server/resources/log4j.properties. Take a moment to inspect the contents of the log4j.properties file so that you are familiar with its structure. By default, Solr log messages will be written to server/logs/solr.log and to stdout (console), which is fine when you're just getting started with Solr. When you're ready to deploy Solr in production, we recommend making a few minor changes to the log settings. Edit log4j.properties and set the solr.log property to the location where you want Solr to write log files, such as /var/solr/logs. Note that if you installed Solr as a service using the instructions provided at Taking Solr to Production , then see /var/solr/log4j.properties instead of the default server/resources vers ion. solr.log=/var/solr/logs Alternatively, you can use the solr.solr.home system property to set the location of the log files, such as: solr.log=${solr.solr.home}/../logs During initialization, Log4J will resolve this to a path based on the solr.solr.home system property. While you’re customizing the log4j.properties file, we also recommend removing the CONSOLE appender from the rootLogger by changing the log4j.rootLogger property to: log4j.rootLogger=INFO, file Also, the default log rotation size threshold of 4MB is too small for production servers and should be increased to a larger value (such as 100MB or more). Apache Solr Reference Guide 6.0 540
log4j.appender.file.MaxFileSize=100MB Logging Slow Queries For high-volume search applications, logging every query can generate a large amount of logs and, depending on the volume, potentially impact performance. If you mine these logs for additional insights into your application, then logging every query request may be useful. On the other hand, if you're only concerned about warnings and error messages related to requests, then you can set the log verbosity to WARN. However, this poses a potential problem in that you won't know if any queries are slow, as slow queries are still logged at the INFO level. Solr provides a way to set your log verbosity threshold to WARN and be able to set a latency threshold above which a request is considered "slow" and log that request at the WARN level to help you identify slow queries in your application. To enable this behavior, configure the element in the query secti on of solrconfig.xml: 1000 Any queries that take longer than the specified threshold will be logged as "slow" queries at the WARN level. Using JMX with Solr Java Management Extensions (JMX) is a technology that makes it possible for complex systems to be controlled by tools without the systems and tools having any previous knowledge of each other. In essence, it is a standard interface by which complex systems can be viewed and manipulated. Solr, like any other good citizen of the Java universe, can be controlled via a JMX interface. You can enable JMX support by adding lines to solrconfig.xml. You can use a JMX client, like jconsole, to connect with Solr. Check out the Wiki page http://wiki.apache.org/solr/SolrJmx for more information. You may also find the following overview of JMX to be useful: http://docs.oracle.com/javase/8/docs/technotes/guides/management/agent.html. Configuring JMX JMX configuration is provided in solrconfig.xml. Please see the JMX Technology Home Page for more details. A rootName attribute can be used when configuring in solrconfig.xml. If this attribute is set, Solr uses it as the root name for all the MBeans that Solr exposes via JMX. The default name is "solr" followed by the core name. Enabling/disabling JMX and securing access to MBeanServers is left up to the user by specifying appropriate JVM parameters and configuration. Please explore the JMX Technology Home Page for more details. Configuring an Existing MBeanServer The command: enables JMX support in Solr if and only if an existing MBeanServer is found. Use this if you want to configure Apache Solr Reference Guide 6.0 541
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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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equestParsers Element The sub-elem
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2. required between requests. The f
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updateRequestProcessorChains and up
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Constructing a chain at request tim
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stripping index.html), the domain a
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In Solr, the term core is used to r
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shareSchema transientCacheSize conf
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name=my_core_name Placement of core
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CREATE RELOAD RENAME SWAP UNLOAD ME
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RELOAD The RELOAD action loads a ne
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In this example, we use the indexDi
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Parameter Type Required Default Des
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{ } "response":{"numFound":1,"start
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Commands for Common Properties The
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The Config API does not let you cre
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Examples Creating and Updating Comm
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Page 493 and 494: Managed Resources Managed resources
Page 495 and 496: Synonyms For the most part, the API
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Page 503 and 504: Managing Solr This section describe
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Page 513 and 514: during initialization. The authoriz
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Page 523 and 524: st Parameters API, and other APIs w
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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: In addition to the logging options
Page 543 and 544: MBean Request Handler The MBean Req
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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
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Page 561 and 562: Changing ACL Schemes Example Usages
Page 563 and 564: When solr wants to create a new zno
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Page 573 and 574: Create a Shard Shards can only crea
Page 575 and 576: The CREATEALIAS action will create
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Page 585 and 586: Key Type Required Description role
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http://localhost:8983/solr/admin/co
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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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