Indexing PostgreSQL with Apache Solr

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Searching and filtering large IP address datasets within PostgreSQL can be challenging. Why? Databases excel at data storage and structured queries, but often struggle with full-text search and complex analysis. Apache Solr, a high-performance search engine built on top of Lucene, is designed to handle these tasks with remarkable speed and flexibility.

What do we need?

  • A running PostgreSQL database with a table containing IP address information (named "ip_loc" in our example).
  • A basic installation of Apache Solr.

Setting up Apache Solr

  1. Create a Solr Core:

    Bash
    solr create -c ip_data -d /path/to/solr/configsets/

  2. Define the Schema (schema.xml)

    XML
    <field name="start_ip" type="ip" indexed="true" stored="true"/>
<field name="end_ip" type="ip" indexed="true" stored="true"/>
<field name="iso2" type="string" indexed="true" stored="true"/>
<field name="state" type="text_general" indexed="true" stored="true"/>
<field name="city" type="text_general" indexed="true" stored="true"/>

Integrating PostgreSQL and Solr

  1. Solr's DataImportHandler (DIH): Add the following DIH configuration to your solrconfig.xml:

    XML
    <dataConfig>
    <dataSource type="JdbcDataSource" 
                driver="org.postgresql.Driver"
                url="jdbc:postgresql://localhost/your_database"
                user="your_username" 
                password="your_password"/>
    <document>
        <entity name="ip_data" query="SELECT * FROM ip_loc">
            <field column="start_ip" name="start_ip" /> 
            </entity>
    </document>
</dataConfig>

  2. Import Data: Initiate the data import using the Solr admin interface or the command line:

    Bash
    http://localhost:8983/solr/ip_data/dataimport?command=full-import

Querying Solr

  • IP Range Search: start_ip:[192.168.0.1 TO 192.168.255.255]
  • Geolocation Filtering: iso2:US AND state:California
  • Combined Search: city:NewYork AND start_ip:[10.0.0.0 TO 10.255.255.255]

Benefits vs. Pure PostgreSQL

  • Performance: Solr's inverted indexes provide superior search speed.
  • Scalability: Solr easily distributes across multiple machines.
  • Flexibility: Solr's query syntax offers rich search capabilities.


My take

By combining PostgreSQL and Apache Solr, you create a robust IP address management system that scales efficiently while providing lightning-fast search functionality.

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