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Posted to commits@kylin.apache.org by li...@apache.org on 2018/06/21 14:01:09 UTC
svn commit: r1834018 [42/45] - in /kylin/site: ./ about/ blog/
blog/2015/01/25/introduce-data-model/
blog/2015/06/10/release-v0.7.1-incubating/
blog/2015/08/13/kylin-dictionary/ blog/2015/08/15/fast-cubing/
blog/2015/09/06/release-v1.0-incubating/ blog...
Added: kylin/site/docs23/tutorial/setup_jdbc_datasource.html
URL: http://svn.apache.org/viewvc/kylin/site/docs23/tutorial/setup_jdbc_datasource.html?rev=1834018&view=auto
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--- kylin/site/docs23/tutorial/setup_jdbc_datasource.html (added)
+++ kylin/site/docs23/tutorial/setup_jdbc_datasource.html Thu Jun 21 14:01:04 2018
@@ -0,0 +1,8961 @@
+<!--
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+ <ul>
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+ <h1 class="post-title">Setup JDBC Data Source</h1>
+
+
+ <article class="post-content" >
+ <blockquote>
+ <p>Available since Apache Kylin v2.3.x</p>
+</blockquote>
+
+<h2 id="supported-jdbc-data-source">Supported JDBC data source</h2>
+
+<p>Since v2.3.0 Apache Kylin starts to support JDBC as the third type of data source (after Hive, Kafka). User can integrate Kylin with their SQL database or data warehouses like MySQL, Microsoft SQL Server and HP Vertica directly. Other relational databases are easy to support as well.</p>
+
+<h2 id="configure-jdbc-data-source">Configure JDBC data source</h2>
+
+<ol>
+ <li>Prepare Sqoop</li>
+</ol>
+
+<p>Kylin uses Apache Sqoop to load data from relational databases to HDFS. Download and install the latest version of Sqoop in the same machine with Kylin. We will use <code class="highlighter-rouge">SQOOP_HOME</code> environment variable to indicate the installation directory of Sqoop in this guide.</p>
+
+<ol>
+ <li>Prepare JDBC driver</li>
+</ol>
+
+<p>You need to download the JDBC Driver of your database to the Kylin server. The JDBC driver jar should be added to <code class="highlighter-rouge">$KYLIN_HOME/ext</code> and <code class="highlighter-rouge">$SQOOP_HOME/lib</code> folder.</p>
+
+<ol>
+ <li>Configure Kylin</li>
+</ol>
+
+<p>In <code class="highlighter-rouge">$KYLIN_HOME/conf/kylin.properties</code>, add the following configurations.</p>
+
+<p>MySQL sample:</p>
+
+<div class="highlighter-rouge"><pre class="highlight"><code>kylin.source.default=8
+kylin.source.jdbc.connection-url=jdbc:mysql://hostname:3306/employees
+kylin.source.jdbc.driver=com.mysql.jdbc.Driver
+kylin.source.jdbc.dialect=mysql
+kylin.source.jdbc.user=your_username
+kylin.source.jdbc.pass=your_password
+kylin.source.jdbc.sqoop-home=/usr/hdp/current/sqoop-client/bin
+kylin.source.jdbc.filed-delimiter=|
+</code></pre>
+</div>
+
+<p>SQL Server sample:</p>
+
+<div class="highlighter-rouge"><pre class="highlight"><code>kylin.source.default=8
+kylin.source.jdbc.connection-url=jdbc:sqlserver://hostname:1433;database=sample
+kylin.source.jdbc.driver=com.microsoft.sqlserver.jdbc.SQLServerDriver
+kylin.source.jdbc.dialect=mssql
+kylin.source.jdbc.user=your_username
+kylin.source.jdbc.pass=your_password
+kylin.source.jdbc.sqoop-home=/usr/hdp/current/sqoop-client/bin
+kylin.source.jdbc.filed-delimiter=|
+</code></pre>
+</div>
+
+<p>Amazon Redshift sample:</p>
+
+<div class="highlighter-rouge"><pre class="highlight"><code>kylin.source.default=8
+kylin.source.jdbc.connection-url=jdbc:redshift://hostname:5439/sample
+kylin.source.jdbc.driver=com.amazon.redshift.jdbc.Driver
+kylin.source.jdbc.dialect=default
+kylin.source.jdbc.user=user
+kylin.source.jdbc.pass=pass
+kylin.source.jdbc.sqoop-home=/usr/hdp/current/sqoop-client/bin
+kylin.source.default=8
+kylin.source.jdbc.filed-delimiter=|
+</code></pre>
+</div>
+
+<p>There is another parameter specifing how many splits should be divided. Sqoop would run a mapper for each split.</p>
+
+<div class="highlighter-rouge"><pre class="highlight"><code>kylin.source.jdbc.sqoop-mapper-num=4
+</code></pre>
+</div>
+
+<p>To make each mapper gets even input, the splitting column is selected by the following rules:<br />
+ * ShardBy column, if exists;<br />
+ * Partition date column, if exists;<br />
+ * High cardinality column, if exists;<br />
+ * Numeric column, if exists;<br />
+ * A column at first glance.</p>
+
+<p>Please note, when configure these parameters in <code class="highlighter-rouge">conf/kylin.properties</code>, all your projects are using the JDBC as data source. If you need access different types of data source, you need configure these parameters at project level, this is the recommended way (since Kylin v2.4.0).</p>
+
+<h2 id="load-tables-from-jdbc-data-source">Load tables from JDBC data source</h2>
+
+<p>Restart Kylin to make the changes effective. You can load tables from JDBC data source now. Visit Kylin web and then navigate to the data source panel.</p>
+
+<p>Click <strong>Load table</strong> button and then input tableâ name, or click the âLoad Table From Treeâ button and select the tables to load. Uncheck <strong>Calculate column cardinality</strong> because this feature is not supported for JDBC data source.</p>
+
+<p>Click âSyncâ, Kylin will load the tablesâ definition through the JDBC interface. You can see tables and columns when tables are loaded successfully, similar as Hive.</p>
+
+<p><img src="/images/docs/jdbc-datasource/load_table_03.png" alt="" /></p>
+
+<p>Go ahead and design your model and Cube. When building the Cube, Kylin will use Sqoop to import the data to HDFS, and then run building over it.</p>
+
+ </article>
+ </div>
+ </div>
+ </div>
+ </div>
+ </div>
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