SOLR deployment and configuration

Solr is usually deployed in two ways. One is to deploy in an external web container such as tomcat, and the other is to use Solr’s built-in jetty as a web container.
Here we use the built-in jetty as the deployment method of the web container.

1.Download solr

Download solr
The version of solr used this time is 6.6.0
After downloading, find a suitable location and unzip

2. Start solr

Open the cmd window and enter the bin folder of the solr decompression directory to execute

solr start -p 8983 

At this time, we can access the solr management interface in the browser

3. Create a core

• Method 1
  By looking at the README file in the solr root directory, I know that it can be used

 solr create -c name

to create a core

According to the feedback of the above command, you can get some useful information
1. Each core needs a core instance directory
2. You can use Solr’s rest interface to achieve core creation

< p>At this time, we refresh the next management interface and you can see

• Method two
  Use solr management page to create
  
  1. In Create a folder under the solr.home directory with the same name as core
     

Here we create core3

2. Copy the configuration file to core3
The configsets file in the figure above stores the basic configuration file.
We put the conf under basic_configs in the configsets Copy to core3

Then create a new folder data in core3 as the storage file for index data

1. Create a core
   In the solr management page, click add core under core admin, modify the name and instanceDir to core3, and then click add core

1. Create complete
   After clicking Finish, there will be an additional core3 in core admin
   

There are also more folders under core3 A core.properties file

The content is

# Written by CorePropertiesLocator#Fri Sep 15< /span> 03:34:37 UTC 2017name=core3config=solrconfig .xmlschema=schema. span>xmldataDir=data pre> 
 
Method 3
 We know that we can use the rest interface of Solr to complete the creation of the core through the command feedback of method one.
 
 
First complete the method two In the first two steps, name the core core4
 
 
Request the solr rest interface
 
 
http://localhost:8983/solr/admin/cores?action=< span class="hljs-constant">CREATE&name=core4&instanceDir=core4


Created successfully


4. Import data
The module responsible for importing data in Solr is called DataImportHandler, which has multiple implementation methods.
-Import from database
 Solr supports multiple forms of data import , The most commonly used is to import data from the database.
 We can find the relevant configuration of importing data from the database from the /example/example-DIH/solr/db/conf that comes with solr as a reference, and then modify the configuration in core1 

Modify solrconfig.xml 
 Add the following configuration

<requestHandler name="/dataimport" class="solr.DataImportHandler"> <lst name="defaults"> <str name="config">db-data-config.xml str> lst>  requestHandler>

Copy from example db-data-config.xml to core1 and modify it according to the usage of the database. I am using mysql here

<dataConfig> <dataSource driver="com.mysql.jdbc.Driver" url="jdbc:mysql://localhost:3306/test" user="root" password="123456" /> <document> <entity name="item" query="select * from showentity"> <field column="description" name="description" /> <field  column="title" name=" title" /> <field column< /span>="createTime" name="createTime" /> <field span> column="type" name ="type" /> entity> document>dataConfig>

Copy the mysql database connection jar to the dist file in the solr root directory, and then modify solrconfig. xml, load this jar package, and the jar package related to dataimport

"${solr.install.dir:../../../..}/dist/" regex=". *\.jar" />


 Modify managed-schema to schema.xml and modify it according to the fields imported from the database configured in db-data-config.xml.

"title" type="text_general" indexed ="true" stored="true" required=" true" multiValued="false" /> "description" type="text_general" indexed="true" stored="true" required="true" multiValued= "false" /> "createTime" type="date" indexed="true" stored="true" required="true" multiValued="false"< /span> /> "type" type="string" indexed="true" stored="true" required=< span class="hljs-string">"true" multiValued="false" />

In core admin Select the core you just modified in the options, and then click the reload button to load the configuration just modified above



Start importing data
 Select just Modify the DataImport option under the core, and then click the execute button



Make a query
 Query in the query option and find the data It has been imported


Summary
Ok here, we have completed the solr single-point deployment and simple configuration. Later, we will continue to summarize the deployment of the solr cloud cluster, the description of some solr configuration files, etc.