D-Net

<!-- 

     this file, see http://wiki.apache.org/solr/SolrConfigXml. 

  <!-- In all configuration below, a prefix of "solr." for class names

       is an alias that causes solr to search appropriate packages,

       including org.apache.solr.(search|update|request|core|analysis)

       You may also specify a fully qualified Java classname if you

       have your own custom plugins.

    -->

  <!-- Controls what version of Lucene various components of Solr

       adhere to.  Generally, you want to use the latest version to

       get all bug fixes and improvements. It is highly recommended

       that you fully re-index after changing this setting as it can

       affect both how text is indexed and queried.

  -->

  <luceneMatchVersion>$luceneMatchVersion$</luceneMatchVersion>

  <!-- <lib/> directives can be used to instruct Solr to load an Jars

       identified and use them to resolve any "plugins" specified in

       your solrconfig.xml or schema.xml (ie: Analyzers, Request

       Handlers, etc...).

       All directories and paths are resolved relative to the

       instanceDir.

       Please note that <lib/> directives are processed in the order

       that they appear in your solrconfig.xml file, and are "stacked" 

       on top of each other when building a ClassLoader - so if you have 

       plugin jars with dependencies on other jars, the "lower level" 

       dependency jars should be loaded first.

       If a "./lib" directory exists in your instanceDir, all files

       found in it are included as if you had used the following

       syntax...

              <lib dir="./lib" />

    -->

  <!-- A 'dir' option by itself adds any files found in the directory 

       to the classpath, this is useful for including all jars in a

       directory.

       When a 'regex' is specified in addition to a 'dir', only the

       files in that directory which completely match the regex

       (anchored on both ends) will be included.

       If a 'dir' option (with or without a regex) is used and nothing

       is found that matches, a warning will be logged.

       The examples below can be used to load some solr-contribs along 

       with their external dependencies.

    -->

  <lib dir="$serverLibPath$" regex=".*\.jar" />

  <!-- an exact 'path' can be used instead of a 'dir' to specify a 

       specific jar file.  This will cause a serious error to be logged 

       if it can't be loaded.

    -->

  <!--

     <lib path="../a-jar-that-does-not-exist.jar" /> 

  -->

  <!-- Data Directory

       Used to specify an alternate directory to hold all index data

       other than the default ./data under the Solr home.  If

       replication is in use, this should match the replication

       configuration.

    -->

  <dataDir>solr/$indexDataDir$</dataDir>

  <!-- The DirectoryFactory to use for indexes.

       solr.StandardDirectoryFactory is filesystem

       based and tries to pick the best implementation for the current

       JVM and platform.  solr.NRTCachingDirectoryFactory, the default,

       wraps solr.StandardDirectoryFactory and caches small files in memory

       for better NRT performance.

       One can force a particular implementation via solr.MMapDirectoryFactory,

       solr.NIOFSDirectoryFactory, or solr.SimpleFSDirectoryFactory.

       solr.RAMDirectoryFactory is memory based, not

       persistent, and doesn't work with replication.

    -->

  <directoryFactory name="DirectoryFactory" 

                    class="\${solr.directoryFactory:solr.NRTCachingDirectoryFactory}">

    <!-- These will be used if you are using the solr.HdfsDirectoryFactory,

         otherwise they will be ignored. If you don't plan on using hdfs,

         you can safely remove this section. -->      

    <!-- The root directory that collection data should be written to. -->     

    <str name="solr.hdfs.home">\${solr.hdfs.home:}</str>

    <!-- The hadoop configuration files to use for the hdfs client. -->    

    <str name="solr.hdfs.confdir">\${solr.hdfs.confdir:}</str>

    <!-- Enable/Disable the hdfs cache. -->    

    <str name="solr.hdfs.blockcache.enabled">\${solr.hdfs.blockcache.enabled:true}</str>

    <!-- Enable/Disable using one global cache for all SolrCores. 

         The settings used will be from the first HdfsDirectoryFactory created. -->    

    <str name="solr.hdfs.blockcache.global">\${solr.hdfs.blockcache.global:true}</str>

  </directoryFactory> 

  <!-- The CodecFactory for defining the format of the inverted index.

       The default implementation is SchemaCodecFactory, which is the official Lucene

       index format, but hooks into the schema to provide per-field customization of

       the postings lists and per-document values in the fieldType element

       (postingsFormat/docValuesFormat). Note that most of the alternative implementations

       are experimental, so if you choose to customize the index format, its a good

       idea to convert back to the official format e.g. via IndexWriter.addIndexes(IndexReader)

       before upgrading to a newer version to avoid unnecessary reindexing.

  -->

  <codecFactory class="solr.SchemaCodecFactory"/>

  <!-- To enable dynamic schema REST APIs, use the following for <schemaFactory>:

       <schemaFactory class="ManagedIndexSchemaFactory">

         <bool name="mutable">true</bool>

         <str name="managedSchemaResourceName">managed-schema</str>

       </schemaFactory>

       When ManagedIndexSchemaFactory is specified, Solr will load the schema from

       he resource named in 'managedSchemaResourceName', rather than from schema.xml.

       Note that the managed schema resource CANNOT be named schema.xml.  If the managed

       schema does not exist, Solr will create it after reading schema.xml, then rename

       'schema.xml' to 'schema.xml.bak'. 

       Do NOT hand edit the managed schema - external modifications will be ignored and

       overwritten as a result of schema modification REST API calls.

       When ManagedIndexSchemaFactory is specified with mutable = true, schema

       modification REST API calls will be allowed; otherwise, error responses will be

       sent back for these requests. 

  -->

  <schemaFactory class="ClassicIndexSchemaFactory"/>

  <!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

       Index Config - These settings control low-level behavior of indexing

       Most example settings here show the default value, but are commented

       out, to more easily see where customizations have been made.

       Note: This replaces <indexDefaults> and <mainIndex> from older versions

       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->

  <indexConfig>

    <!-- maxFieldLength was removed in 4.0. To get similar behavior, include a 

         LimitTokenCountFilterFactory in your fieldType definition. E.g. 

     <filter class="solr.LimitTokenCountFilterFactory" maxTokenCount="10000"/>

    -->

    <!-- Maximum time to wait for a write lock (ms) for an IndexWriter. Default: 1000 -->

    <!-- <writeLockTimeout>1000</writeLockTimeout>  -->

    <!-- The maximum number of simultaneous threads that may be

         indexing documents at once in IndexWriter; if more than this

         many threads arrive they will wait for others to finish.

         Default in Solr/Lucene is 8. -->

    <maxIndexingThreads>$maxIndexingThreads$</maxIndexingThreads> 

    <!-- Expert: Enabling compound file will use less files for the index, 

         using fewer file descriptors on the expense of performance decrease. 

         Default in Lucene is "true". Default in Solr is "false" (since 3.6) -->

    <!-- <useCompoundFile>false</useCompoundFile> -->

    <!-- ramBufferSizeMB sets the amount of RAM that may be used by Lucene

         indexing for buffering added documents and deletions before they are

         flushed to the Directory.

         maxBufferedDocs sets a limit on the number of documents buffered

         before flushing.

         If both ramBufferSizeMB and maxBufferedDocs is set, then

         Lucene will flush based on whichever limit is hit first.

         The default is 100 MB.  -->

    <!-- <ramBufferSizeMB>100</ramBufferSizeMB> -->

    <!-- <maxBufferedDocs>1000</maxBufferedDocs> -->

    <ramBufferSizeMB>$ramBufferSizeMB$</ramBufferSizeMB>

    <!-- Expert: Merge Policy 

         The Merge Policy in Lucene controls how merging of segments is done.

         The default since Solr/Lucene 3.3 is TieredMergePolicy.

         The default since Lucene 2.3 was the LogByteSizeMergePolicy,

         Even older versions of Lucene used LogDocMergePolicy.

      -->

    <!--

        <mergePolicy class="org.apache.lucene.index.TieredMergePolicy">

          <int name="maxMergeAtOnce">10</int>

          <int name="segmentsPerTier">10</int>

        </mergePolicy>

      -->

    <!-- Merge Factor

         The merge factor controls how many segments will get merged at a time.

         For TieredMergePolicy, mergeFactor is a convenience parameter which

         will set both MaxMergeAtOnce and SegmentsPerTier at once.

         For LogByteSizeMergePolicy, mergeFactor decides how many new segments

         will be allowed before they are merged into one.

         Default is 10 for both merge policies.

      -->

    	<mergeFactor>$mergeFactor$</mergeFactor>

    <!-- Expert: Merge Scheduler

         The Merge Scheduler in Lucene controls how merges are

         performed.  The ConcurrentMergeScheduler (Lucene 2.3 default)

         can perform merges in the background using separate threads.

         The SerialMergeScheduler (Lucene 2.2 default) does not.

     -->

    <!-- 

       <mergeScheduler class="org.apache.lucene.index.ConcurrentMergeScheduler"/>

       -->

    <!-- LockFactory 

         This option specifies which Lucene LockFactory implementation

         to use.

         single = SingleInstanceLockFactory - suggested for a

                  read-only index or when there is no possibility of

                  another process trying to modify the index.

         native = NativeFSLockFactory - uses OS native file locking.

                  Do not use when multiple solr webapps in the same

                  JVM are attempting to share a single index.

         simple = SimpleFSLockFactory  - uses a plain file for locking

         Defaults: 'native' is default for Solr3.6 and later, otherwise

                   'simple' is the default

         More details on the nuances of each LockFactory...

         http://wiki.apache.org/lucene-java/AvailableLockFactories

    -->

    <lockType>\${solr.lock.type:native}</lockType>

    <!-- Unlock On Startup

         If true, unlock any held write or commit locks on startup.

         This defeats the locking mechanism that allows multiple

         processes to safely access a lucene index, and should be used

         with care. Default is "false".

         This is not needed if lock type is 'single'

     -->

    <!--

    <unlockOnStartup>false</unlockOnStartup>

      -->

    <!-- If true, IndexReaders will be opened/reopened from the IndexWriter

         instead of from the Directory. Hosts in a master/slave setup

         should have this set to false while those in a SolrCloud

         cluster need to be set to true. Default: true

      -->

    <!--

    <nrtMode>true</nrtMode>

      -->

    <!-- Commit Deletion Policy

         Custom deletion policies can be specified here. The class must

         implement org.apache.lucene.index.IndexDeletionPolicy.

         The default Solr IndexDeletionPolicy implementation supports

         deleting index commit points on number of commits, age of

         commit point and optimized status.

         The latest commit point should always be preserved regardless

         of the criteria.

    -->

    <!--

    <deletionPolicy class="solr.SolrDeletionPolicy">

    -->

      <!-- The number of commit points to be kept -->

      <!-- <str name="maxCommitsToKeep">1</str> -->

      <!-- The number of optimized commit points to be kept -->

      <!-- <str name="maxOptimizedCommitsToKeep">0</str> -->

      <!--

          Delete all commit points once they have reached the given age.

          Supports DateMathParser syntax e.g.

        -->

      <!--

         <str name="maxCommitAge">30MINUTES</str>

         <str name="maxCommitAge">1DAY</str>

      -->

    <!--

    </deletionPolicy>

    -->

    <!-- Lucene Infostream

         To aid in advanced debugging, Lucene provides an "InfoStream"

         of detailed information when indexing.

         Setting the value to true will instruct the underlying Lucene

         IndexWriter to write its info stream to solr's log. By default,

         this is enabled here, and controlled through log4j.properties.

      -->

     <infoStream>true</infoStream>

    <!--

        Use true to enable this safety check, which can help

        reduce the risk of propagating index corruption from older segments

        into new ones, at the expense of slower merging.

    -->

     <checkIntegrityAtMerge>false</checkIntegrityAtMerge>

  </indexConfig>

  <!-- JMX

       This example enables JMX if and only if an existing MBeanServer

       is found, use this if you want to configure JMX through JVM

       parameters. Remove this to disable exposing Solr configuration

       and statistics to JMX.

       For more details see http://wiki.apache.org/solr/SolrJmx

    -->

  <jmx />

  <!-- If you want to connect to a particular client, specify the

       agentId

    -->

  <!-- <jmx agentId="myAgent" /> -->

  <!-- If you want to start a new MBeanServer, specify the serviceUrl -->

  <!-- <jmx serviceUrl="service:jmx:rmi:///jndi/rmi://localhost:9999/solr"/>

    -->

  <!-- The default high-performance update handler -->

  <updateHandler class="solr.DirectUpdateHandler2">

    <!-- Enables a transaction log, used for real-time get, durability, and

         and solr cloud replica recovery.  The log can grow as big as

         uncommitted changes to the index, so use of a hard autoCommit

         is recommended (see below).

         "dir" - the target directory for transaction logs, defaults to the

                solr data directory.  -->

    <updateLog>

      <str name="dir">\${solr.ulog.dir:}</str>

    </updateLog>

    <!-- AutoCommit

         Perform a hard commit automatically under certain conditions.

         Instead of enabling autoCommit, consider using "commitWithin"

         when adding documents.

         http://wiki.apache.org/solr/UpdateXmlMessages

         maxDocs - Maximum number of documents to add since the last

                   commit before automatically triggering a new commit.

         maxTime - Maximum amount of time in ms that is allowed to pass

                   since a document was added before automatically

                   triggering a new commit.

         openSearcher - if false, the commit causes recent index changes

           to be flushed to stable storage, but does not cause a new

           searcher to be opened to make those changes visible.

         If the updateLog is enabled, then it's highly recommended to

         have some sort of hard autoCommit to limit the log size.

      -->

     <autoCommit>

       <maxTime>\${solr.autoCommit.maxTime:$autocommit$}</maxTime>

       <openSearcher>false</openSearcher>

     </autoCommit>

    <!-- softAutoCommit is like autoCommit except it causes a

         'soft' commit which only ensures that changes are visible

         but does not ensure that data is synced to disk.  This is

         faster and more near-realtime friendly than a hard commit.

      -->

     <autoSoftCommit>

       <maxTime>\${solr.autoSoftCommit.maxTime:$autosoftcommit$}</maxTime>

     </autoSoftCommit>

    <!-- Update Related Event Listeners

         Various IndexWriter related events can trigger Listeners to

         take actions.

         postCommit - fired after every commit or optimize command

         postOptimize - fired after every optimize command

      -->

    <!-- The RunExecutableListener executes an external command from a

         hook such as postCommit or postOptimize.

         exe - the name of the executable to run

         dir - dir to use as the current working directory. (default=".")

         wait - the calling thread waits until the executable returns.

                (default="true")

         args - the arguments to pass to the program.  (default is none)

         env - environment variables to set.  (default is none)

      -->

    <!-- This example shows how RunExecutableListener could be used

         with the script based replication...

         http://wiki.apache.org/solr/CollectionDistribution

      -->

    <!--

       <listener event="postCommit" class="solr.RunExecutableListener">

         <str name="exe">solr/bin/snapshooter</str>

         <str name="dir">.</str>

         <bool name="wait">true</bool>

         <arr name="args"> <str>arg1</str> <str>arg2</str> </arr>

         <arr name="env"> <str>MYVAR=val1</str> </arr>

       </listener>

      -->

  </updateHandler>

  <!-- IndexReaderFactory

       Use the following format to specify a custom IndexReaderFactory,

       which allows for alternate IndexReader implementations.

       ** Experimental Feature **

       Please note - Using a custom IndexReaderFactory may prevent

       certain other features from working. The API to

       IndexReaderFactory may change without warning or may even be

       removed from future releases if the problems cannot be

       resolved.

       ** Features that may not work with custom IndexReaderFactory **

       The ReplicationHandler assumes a disk-resident index. Using a

       custom IndexReader implementation may cause incompatibility

       with ReplicationHandler and may cause replication to not work

       correctly. See SOLR-1366 for details.

    -->

  <!--

  <indexReaderFactory name="IndexReaderFactory" class="package.class">

    <str name="someArg">Some Value</str>

  </indexReaderFactory >

  -->

  <!-- By explicitly declaring the Factory, the termIndexDivisor can

       be specified.

    -->

  <!--

     <indexReaderFactory name="IndexReaderFactory"

                         class="solr.StandardIndexReaderFactory">

       <int name="setTermIndexDivisor">12</int>

     </indexReaderFactory >

    -->

  <!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

       Query section - these settings control query time things like caches

       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->

  <query>

    <!-- Max Boolean Clauses

         Maximum number of clauses in each BooleanQuery,  an exception

         is thrown if exceeded.

         ** WARNING **

         This option actually modifies a global Lucene property that

         will affect all SolrCores.  If multiple solrconfig.xml files

         disagree on this property, the value at any given moment will

         be based on the last SolrCore to be initialized.

      -->

    <maxBooleanClauses>1024</maxBooleanClauses>

    <!-- Solr Internal Query Caches

         There are two implementations of cache available for Solr,

         LRUCache, based on a synchronized LinkedHashMap, and

         FastLRUCache, based on a ConcurrentHashMap.

         FastLRUCache has faster gets and slower puts in single

         threaded operation and thus is generally faster than LRUCache

         when the hit ratio of the cache is high (> 75%), and may be

         faster under other scenarios on multi-cpu systems.

    -->

    <!-- Filter Cache

         Cache used by SolrIndexSearcher for filters (DocSets),

         unordered sets of *all* documents that match a query.  When a

         new searcher is opened, its caches may be prepopulated or

         "autowarmed" using data from caches in the old searcher.

         autowarmCount is the number of items to prepopulate.  For

         LRUCache, the autowarmed items will be the most recently

         accessed items.

         Parameters:

           class - the SolrCache implementation LRUCache or

               (LRUCache or FastLRUCache)

           size - the maximum number of entries in the cache

           initialSize - the initial capacity (number of entries) of

               the cache.  (see java.util.HashMap)

           autowarmCount - the number of entries to prepopulate from

               and old cache.

      -->

    <filterCache class="solr.FastLRUCache"

                 size="$filterCacheSize$"

                 initialSize="$filterCacheInitialSize$"

                 autowarmCount="0"/>

    <!-- Query Result Cache

         Caches results of searches - ordered lists of document ids

         (DocList) based on a query, a sort, and the range of documents requested.

      -->

    <queryResultCache class="solr.LRUCache"

                     size="$queryCacheSize$"

                     initialSize="$queryCacheInitialSize$"

                     autowarmCount="0"/>

    <!-- Document Cache

         Caches Lucene Document objects (the stored fields for each

         document).  Since Lucene internal document ids are transient,

         this cache will not be autowarmed.

      -->

    <documentCache class="solr.LRUCache"

                   size="$documentCacheSize$"

                   initialSize="$documentCacheInitialSize$"

                   autowarmCount="0"/>

    <!-- custom cache currently used by block join -->

    <cache name="perSegFilter"

      class="solr.search.LRUCache"

      size="10"

      initialSize="0"

      autowarmCount="10"

      regenerator="solr.NoOpRegenerator" />

    <!-- Field Value Cache

         Cache used to hold field values that are quickly accessible

         by document id.  The fieldValueCache is created by default

         even if not configured here.

      -->

    <!--

       <fieldValueCache class="solr.FastLRUCache"

                        size="512"

                        autowarmCount="128"

                        showItems="32" />

      -->

    <!-- Custom Cache

         Example of a generic cache.  These caches may be accessed by

         name through SolrIndexSearcher.getCache(),cacheLookup(), and

         cacheInsert().  The purpose is to enable easy caching of

         user/application level data.  The regenerator argument should

         be specified as an implementation of solr.CacheRegenerator

         if autowarming is desired.

      -->

    <!--

       <cache name="myUserCache"

              class="solr.LRUCache"

              size="4096"

              initialSize="1024"

              autowarmCount="1024"

              regenerator="com.mycompany.MyRegenerator"

              />

      -->

    <!-- Lazy Field Loading

         If true, stored fields that are not requested will be loaded

         lazily.  This can result in a significant speed improvement

         if the usual case is to not load all stored fields,

         especially if the skipped fields are large compressed text

         fields.

    -->

    <enableLazyFieldLoading>true</enableLazyFieldLoading>

   <!-- Use Filter For Sorted Query

        A possible optimization that attempts to use a filter to

        satisfy a search.  If the requested sort does not include

        score, then the filterCache will be checked for a filter

        matching the query. If found, the filter will be used as the

        source of document ids, and then the sort will be applied to

        that.

        For most situations, this will not be useful unless you

        frequently get the same search repeatedly with different sort

        options, and none of them ever use "score"

     -->

   <!--

      <useFilterForSortedQuery>true</useFilterForSortedQuery>

     -->

   <!-- Result Window Size

        An optimization for use with the queryResultCache.  When a search

        is requested, a superset of the requested number of document ids

        are collected.  For example, if a search for a particular query

        requests matching documents 10 through 19, and queryWindowSize is 50,

        then documents 0 through 49 will be collected and cached.  Any further

        requests in that range can be satisfied via the cache.

     -->

   <queryResultWindowSize>$queryResultWindowSize$</queryResultWindowSize>

   <!-- Maximum number of documents to cache for any entry in the

        queryResultCache.

     -->

   <queryResultMaxDocsCached>$queryResultMaxDocCached$</queryResultMaxDocsCached>

   <!-- Query Related Event Listeners

        Various IndexSearcher related events can trigger Listeners to

        take actions.

        newSearcher - fired whenever a new searcher is being prepared

        and there is a current searcher handling requests (aka

        registered).  It can be used to prime certain caches to

        prevent long request times for certain requests.

        firstSearcher - fired whenever a new searcher is being

        prepared but there is no current registered searcher to handle

        requests or to gain autowarming data from.

     -->

    <!-- QuerySenderListener takes an array of NamedList and executes a

         local query request for each NamedList in sequence.

      -->

    <listener event="newSearcher" class="solr.QuerySenderListener">

      <arr name="queries">

        <!--

           <lst><str name="q">solr</str><str name="sort">price asc</str></lst>

           <lst><str name="q">rocks</str><str name="sort">weight asc</str></lst>

          -->

      </arr>

    </listener>

    <listener event="firstSearcher" class="solr.QuerySenderListener">

      <arr name="queries">

        <lst>

          <str name="q">static firstSearcher warming in solrconfig.xml</str>

        </lst>

      </arr>

    </listener>

    <!-- Use Cold Searcher

         If a search request comes in and there is no current

         registered searcher, then immediately register the still

         warming searcher and use it.  If "false" then all requests

         will block until the first searcher is done warming.

      -->

    <useColdSearcher>false</useColdSearcher>

    <!-- Max Warming Searchers

         Maximum number of searchers that may be warming in the

         background concurrently.  An error is returned if this limit

         is exceeded.

         Recommend values of 1-2 for read-only slaves, higher for

         masters w/o cache warming.

      -->

    <maxWarmingSearchers>2</maxWarmingSearchers>

  </query>

  <!-- Request Dispatcher

       This section contains instructions for how the SolrDispatchFilter

       should behave when processing requests for this SolrCore.

       handleSelect is a legacy option that affects the behavior of requests

       such as /select?qt=XXX

       handleSelect="true" will cause the SolrDispatchFilter to process

       the request and dispatch the query to a handler specified by the

       "qt" param, assuming "/select" isn't already registered.

       handleSelect="false" will cause the SolrDispatchFilter to

       ignore "/select" requests, resulting in a 404 unless a handler

       is explicitly registered with the name "/select"

       handleSelect="true" is not recommended for new users, but is the default

       for backwards compatibility

    -->

  <requestDispatcher handleSelect="false" >

    <!-- Request Parsing

         These settings indicate how Solr Requests may be parsed, and

         what restrictions may be placed on the ContentStreams from

         those requests

         enableRemoteStreaming - enables use of the stream.file

         and stream.url parameters for specifying remote streams.

         multipartUploadLimitInKB - specifies the max size (in KiB) of

         Multipart File Uploads that Solr will allow in a Request.

         formdataUploadLimitInKB - specifies the max size (in KiB) of

         form data (application/x-www-form-urlencoded) sent via

         POST. You can use POST to pass request parameters not

         fitting into the URL.

         addHttpRequestToContext - if set to true, it will instruct

         the requestParsers to include the original HttpServletRequest

         object in the context map of the SolrQueryRequest under the

         key "httpRequest". It will not be used by any of the existing

         Solr components, but may be useful when developing custom

         plugins.

         *** WARNING ***

         The settings below authorize Solr to fetch remote files, You

         should make sure your system has some authentication before

         using enableRemoteStreaming="true"

      -->

    <requestParsers enableRemoteStreaming="true"

                    multipartUploadLimitInKB="2048000"

                    formdataUploadLimitInKB="2048"

                    addHttpRequestToContext="false"/>

    <!-- HTTP Caching

         Set HTTP caching related parameters (for proxy caches and clients).

         The options below instruct Solr not to output any HTTP Caching

         related headers

      -->

    <httpCaching never304="true" />

    <!-- If you include a <cacheControl> directive, it will be used to

         generate a Cache-Control header (as well as an Expires header

         if the value contains "max-age=")

         By default, no Cache-Control header is generated.

         You can use the <cacheControl> option even if you have set

         never304="true"

      -->

    <!--

       <httpCaching never304="true" >

         <cacheControl>max-age=30, public</cacheControl>

       </httpCaching>

      -->

    <!-- To enable Solr to respond with automatically generated HTTP

         Caching headers, and to response to Cache Validation requests

         correctly, set the value of never304="false"

         This will cause Solr to generate Last-Modified and ETag

         headers based on the properties of the Index.

         The following options can also be specified to affect the

         values of these headers...

         lastModFrom - the default value is "openTime" which means the

         Last-Modified value (and validation against If-Modified-Since

         requests) will all be relative to when the current Searcher

         was opened.  You can change it to lastModFrom="dirLastMod" if

         you want the value to exactly correspond to when the physical

         index was last modified.

         etagSeed="..." is an option you can change to force the ETag

         header (and validation against If-None-Match requests) to be

         different even if the index has not changed (ie: when making

         significant changes to your config file)

         (lastModifiedFrom and etagSeed are both ignored if you use

         the never304="true" option)

      -->

    <!--

       <httpCaching lastModifiedFrom="openTime"

                    etagSeed="Solr">

         <cacheControl>max-age=30, public</cacheControl>

       </httpCaching>

      -->

  </requestDispatcher>

  <!-- Request Handlers

       http://wiki.apache.org/solr/SolrRequestHandler

       Incoming queries will be dispatched to a specific handler by name

       based on the path specified in the request.

       Legacy behavior: If the request path uses "/select" but no Request

       Handler has that name, and if handleSelect="true" has been specified in

       the requestDispatcher, then the Request Handler is dispatched based on

       the qt parameter.  Handlers without a leading '/' are accessed this way

       like so: http://host/app/[core/]select?qt=name  If no qt is

       given, then the requestHandler that declares default="true" will be

       used or the one named "standard".

       If a Request Handler is declared with startup="lazy", then it will

       not be initialized until the first request that uses it.

    -->

  <!-- SearchHandler

       http://wiki.apache.org/solr/SearchHandler

       For processing Search Queries, the primary Request Handler

       provided with Solr is "SearchHandler" It delegates to a sequent

       of SearchComponents (see below) and supports distributed

       queries across multiple shards

    -->

  <requestHandler name="/select" class="solr.SearchHandler">

    <!-- default values for query parameters can be specified, these

         will be overridden by parameters in the request

      -->

     <lst name="defaults">

       <str name="echoParams">explicit</str>

       <int name="rows">10</int>

       <str name="df">__all</str>

     </lst>

    <!-- In addition to defaults, "appends" params can be specified

         to identify values which should be appended to the list of

         multi-val params from the query (or the existing "defaults").

      -->

    <!-- In this example, the param "fq=instock:true" would be appended to

         any query time fq params the user may specify, as a mechanism for

         partitioning the index, independent of any user selected filtering

         that may also be desired (perhaps as a result of faceted searching).