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| |
| <h1>Apache Kudu Quickstart</h1> |
| <div id="preamble"> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Follow these instructions to set up and run the Kudu VM, and start with Kudu, Kudu_Impala, |
| and CDH in minutes.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="quickstart_vm"><a class="link" href="#quickstart_vm">Get The Kudu Quickstart VM</a></h2> |
| <div class="sectionbody"> |
| <div class="sect2"> |
| <h3 id="_prerequisites"><a class="link" href="#_prerequisites">Prerequisites</a></h3> |
| <div class="olist arabic"> |
| <ol class="arabic"> |
| <li> |
| <p>Install <a href="https://www.virtualbox.org/">Oracle Virtualbox</a>. The VM has been tested to work |
| with VirtualBox version 4.3 on Ubuntu 14.04 and VirtualBox version 5 on OSX |
| 10.9. VirtualBox is also included in most package managers: apt-get, brew, etc.</p> |
| </li> |
| <li> |
| <p>After the installation, make sure that <code>VBoxManage</code> is in your <code>PATH</code> by using the |
| <code>which VBoxManage</code> command.</p> |
| </li> |
| </ol> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="_installation"><a class="link" href="#_installation">Installation</a></h3> |
| <div class="paragraph"> |
| <p>To download and start the VM, execute the following command in a terminal window.</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-bash" data-lang="bash">$ curl -s https://raw.githubusercontent.com/cloudera/kudu-examples/master/demo-vm-setup/bootstrap.sh | bash</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>This command downloads a shell script which clones the <code>kudu-examples</code> Git repository and |
| then downloads a VM image of about 1.2GB size into the current working |
| directory.<sup class="footnote">[<a id="_footnoteref_1" class="footnote" href="#_footnote_1" title="View footnote.">1</a>]</sup> You can examine the script after downloading it by removing |
| the <code>| bash</code> component of the command above. Once the setup is complete, you can verify |
| that everything works by connecting to the guest via SSH:</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-bash" data-lang="bash">$ ssh demo@quickstart.cloudera</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>The username and password for the demo account are both <code>demo</code>. In addition, the <code>demo</code> |
| user has password-less <code>sudo</code> privileges so that you can install additional software or |
| manage the guest OS. You can also access the <code>kudu-examples</code> as a shared folder in |
| <code>/home/demo/kudu-examples/</code> on the guest or from your VirtualBox shared folder location on |
| the host. This is a quick way to make scripts or data visible to the guest.</p> |
| </div> |
| <div class="paragraph"> |
| <p>You can quickly verify if Kudu and Impala are running by executing the following commands:</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-bash" data-lang="bash">$ ps aux | grep kudu |
| $ ps aux | grep impalad</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>If you have issues connecting to the VM or one of the processes is not running, make sure |
| to consult the <a href="#trouble">Troubleshooting</a> section.</p> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_load_data"><a class="link" href="#_load_data">Load Data</a></h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>To perform some typical operations with Kudu and Impala, you can load the |
| <a href="http://www.flysfo.com/media/facts-statistics/air-traffic-statistics">SFO Passenger Data</a> |
| into Impala and then load it into Kudu.</p> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic"> |
| <li> |
| <p>Upload the sample data from the home directory to HDFS.</p> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-bash" data-lang="bash">$ hdfs dfs -mkdir /data |
| $ hdfs dfs -put examples/SFO_Passenger_Data/MonthlyPassengerData_200507_to_201506.csv /data</code></pre> |
| </div> |
| </div> |
| </li> |
| <li> |
| <p>Create a new external Impala table to access the plain text data. To connect to Impala |
| in the virtual machine issue the following command:</p> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-bash" data-lang="bash">ssh demo@quickstart.cloudera -t impala-shell</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Now, you can execute the following commands:</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-sql" data-lang="sql">CREATE EXTERNAL TABLE passenger_data_raw ( |
| id int, |
| activity_period int, |
| operating_airline string, |
| airline_iata_code string, |
| published_airline string, |
| published_airline_iata_code string, |
| geo_summary string, |
| geo_region string, |
| activity_type_code string, |
| price_category_code string, |
| terminal string, |
| boarding_area string, |
| passenger_count bigint |
| ) |
| ROW FORMAT DELIMITED |
| FIELDS TERMINATED BY ',' |
| LOCATION '/data/';</code></pre> |
| </div> |
| </div> |
| </li> |
| <li> |
| <p>Validate if the data was actually loaded run the following command:</p> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-sql" data-lang="sql">SELECT count(*) FROM passenger_data_raw; |
| |
| +----------+ |
| | count(*) | |
| +----------+ |
| | 13901 | |
| +----------+</code></pre> |
| </div> |
| </div> |
| </li> |
| <li> |
| <p>It’s easy to convert data from any Hadoop file format and store it Kudu using the |
| <code>CREATE TABLE AS SELECT</code> statement.</p> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-sql" data-lang="sql">CREATE TABLE passenger_data |
| DISTRIBUTE BY HASH (id) INTO 16 BUCKETS |
| TBLPROPERTIES( |
| 'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler', |
| 'kudu.table_name' = 'passenger_data', |
| 'kudu.master_addresses' = '127.0.0.1', |
| 'kudu.key_columns' = 'id' |
| ) AS SELECT * FROM passenger_data_raw; |
| |
| +-----------------------+ |
| | summary | |
| +-----------------------+ |
| | Inserted 13901 row(s) | |
| +-----------------------+ |
| Fetched 1 row(s) in 1.26s</code></pre> |
| </div> |
| </div> |
| </li> |
| </ol> |
| </div> |
| <div class="exampleblock"> |
| <div class="content"> |
| <div class="paragraph"> |
| <p>For <code>CREATE TABLE …​ AS SELECT</code> we currently require that the first columns that are |
| projected in the <code>SELECT</code> statement correspond to the Kudu table keys and are in the |
| same order (<code>id</code> in the example above). If the default projection generated by <code>*</code> |
| does not meet this requirement, the user should avoid using <code>*</code> and explicitly mention |
| the columns to project, in the correct order.</p> |
| </div> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>+ |
| The created table uses a simple single column primary key. See |
| <a href="kudu_impala_integration.html#kudu_impala">Kudu Impala Integration</a> for a more detailed |
| introduction to the extended SQL syntax for Impala.</p> |
| </div> |
| <div class="paragraph"> |
| <p>+ |
| The columns of the created table are copied from the <code>passenger_data_raw</code> base table. See |
| <a href="http://www.cloudera.com/content/www/en-us/documentation/enterprise/latest/topics/impala_create_table.html">Impala’s |
| documentation</a> for more details about the extended SQL syntax for Impala.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_read_and_modify_data"><a class="link" href="#_read_and_modify_data">Read and Modify Data</a></h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Now that the data is stored in Kudu, you can run queries against it. The following query |
| lists the airline with the highest passenger volume over the entire reporting timeframe.</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-sql" data-lang="sql">SELECT sum(passenger_count) AS total, operating_airline FROM passenger_data |
| GROUP BY operating_airline |
| HAVING total IS NOT null |
| ORDER BY total DESC LIMIT 10; |
| |
| +-----------+----------------------------------+ |
| | total | operating_airline | |
| +-----------+----------------------------------+ |
| | 105363917 | United Airlines - Pre 07/01/2013 | |
| | 51319845 | United Airlines | |
| | 32657456 | SkyWest Airlines | |
| | 31727343 | American Airlines | |
| | 23801507 | Delta Air Lines | |
| | 23685267 | Virgin America | |
| | 22507320 | Southwest Airlines | |
| | 16235520 | US Airways | |
| | 11860630 | Alaska Airlines | |
| | 6706438 | JetBlue Airways | |
| +-----------+----------------------------------+</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Looking at the result, you can already see a problem with the dataset. There is a |
| duplicate airline name. Since the data is stored in Kudu rather than HDFS, you can quickly |
| change any individual record and fix the problem without having to rewrite the entire |
| table.</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-sql" data-lang="sql">UPDATE passenger_data |
| SET operating_airline="United Airlines" |
| WHERE operating_airline LIKE "United Airlines - Pre%"; |
| |
| SELECT sum(passenger_count) AS total, operating_airline FROM passenger_data |
| GROUP BY operating_airline |
| HAVING total IS NOT null |
| ORDER BY total DESC LIMIT 10; |
| |
| +-----------+--------------------+ |
| | total | operating_airline | |
| +-----------+--------------------+ |
| | 156683762 | United Airlines | |
| | 32657456 | SkyWest Airlines | |
| | 31727343 | American Airlines | |
| | 23801507 | Delta Air Lines | |
| | 23685267 | Virgin America | |
| | 22507320 | Southwest Airlines | |
| | 16235520 | US Airways | |
| | 11860630 | Alaska Airlines | |
| | 6706438 | JetBlue Airways | |
| | 6266220 | Northwest Airlines | |
| +-----------+--------------------+</code></pre> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="trouble"><a class="link" href="#trouble">Troubleshooting</a></h3> |
| <div class="sect3"> |
| <h4 id="_problems_accessing_the_vm_via_ssh"><a class="link" href="#_problems_accessing_the_vm_via_ssh">Problems accessing the VM via SSH</a></h4> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>Make sure the host has a SSH client installed.</p> |
| </li> |
| <li> |
| <p>Make sure the VM is running, by running the following command and checking for a VM called <code>kudu-demo</code>:</p> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-bash" data-lang="bash">$ VBoxManage list runningvms</code></pre> |
| </div> |
| </div> |
| </li> |
| <li> |
| <p>Verify that the VM’s IP address is included in the host’s <code>/etc/hosts</code> file. You should |
| see a line that includes an IP address followed by the hostname |
| <code>quickstart.cloudera</code>. To check the running VM’s IP address, use the <code>VBoxManage</code> |
| command below.</p> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-bash" data-lang="bash">$ VBoxManage guestproperty get kudu-demo /VirtualBox/GuestInfo/Net/0/V4/IP |
| Value: 192.168.56.100</code></pre> |
| </div> |
| </div> |
| </li> |
| <li> |
| <p>If you’ve used a Cloudera Quickstart VM before, your <code>.ssh/known_hosts</code> file may |
| contain references to the previous VM’s SSH credentials. Remove any references to |
| <code>quickstart.cloudera</code> from this file.</p> |
| </li> |
| </ul> |
| </div> |
| </div> |
| <div class="sect3"> |
| <h4 id="_failing_with_lack_of_sse4_2_support_when_running_inside_virtualbox"><a class="link" href="#_failing_with_lack_of_sse4_2_support_when_running_inside_virtualbox">Failing with lack of SSE4.2 support when running inside VirtualBox</a></h4> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>Running Kudu currently requires a CPU that supports SSE4.2 (Nehalem or later for Intel). To pass through SSE4.2 support into the guest VM, refer to the <a href="https://www.virtualbox.org/manual/ch09.html#sse412passthrough">VirtualBox documentation</a></p> |
| </li> |
| </ul> |
| </div> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_next_steps"><a class="link" href="#_next_steps">Next Steps</a></h2> |
| <div class="sectionbody"> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p><a href="installation.html">Installing Kudu</a></p> |
| </li> |
| <li> |
| <p><a href="configuration.html">Configuring Kudu</a></p> |
| </li> |
| </ul> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="col-md-3"> |
| |
| <div id="toc" data-spy="affix" data-offset-top="70"> |
| <ul> |
| |
| <li> |
| |
| <a href="index.html">Introducing Kudu</a> |
| </li> |
| <li> |
| |
| <a href="release_notes.html">Kudu Release Notes</a> |
| </li> |
| <li> |
| <span class="active-toc">Getting Started with Kudu</span> |
| <ul class="sectlevel1"> |
| <li><a href="#quickstart_vm">Get The Kudu Quickstart VM</a> |
| <ul class="sectlevel2"> |
| <li><a href="#_prerequisites">Prerequisites</a></li> |
| <li><a href="#_installation">Installation</a></li> |
| </ul> |
| </li> |
| <li><a href="#_load_data">Load Data</a></li> |
| <li><a href="#_read_and_modify_data">Read and Modify Data</a> |
| <ul class="sectlevel2"> |
| <li><a href="#trouble">Troubleshooting</a></li> |
| </ul> |
| </li> |
| <li><a href="#_next_steps">Next Steps</a></li> |
| </ul> |
| </li> |
| <li> |
| |
| <a href="installation.html">Installation Guide</a> |
| </li> |
| <li> |
| |
| <a href="configuration.html">Configuring Kudu</a> |
| </li> |
| <li> |
| |
| <a href="kudu_impala_integration.html">Using Impala with Kudu</a> |
| </li> |
| <li> |
| |
| <a href="administration.html">Administering Kudu</a> |
| </li> |
| <li> |
| |
| <a href="troubleshooting.html">Troubleshooting Kudu</a> |
| </li> |
| <li> |
| |
| <a href="developing.html">Developing Applications with Kudu</a> |
| </li> |
| <li> |
| |
| <a href="schema_design.html">Kudu Schema Design</a> |
| </li> |
| <li> |
| |
| <a href="transaction_semantics.html">Kudu Transaction Semantics</a> |
| </li> |
| <li> |
| |
| <a href="contributing.html">Contributing to Kudu</a> |
| </li> |
| <li> |
| |
| <a href="style_guide.html">Kudu Documentation Style Guide</a> |
| </li> |
| <li> |
| |
| <a href="configuration_reference.html">Kudu Configuration Reference</a> |
| </li> |
| </ul> |
| </div> |
| </div> |
| </div> |
| </div> |
| |
| |
| <div id="footnotes"> |
| <hr> |
| <div class="footnote" id="_footnote_1"> |
| <a href="#_footnoteref_1">1</a>. In addition, the script will create a host-only network between host and guest and setup an enty in the <code>/etc/hosts</code> file with the name <code>quickstart.cloudera</code> and the guest’s IP address. |
| </div> |
| </div> |
| <footer class="footer"> |
| <div class="row"> |
| <div class="col-md-9"> |
| <p class="small"> |
| Copyright © 2019 The Apache Software Foundation. Last updated 2016-10-07 11:34:55 PDT |
| </p> |
| <p class="small"> |
| Apache Kudu, Kudu, Apache, the Apache feather logo, and the Apache Kudu |
| project logo are either registered trademarks or trademarks of The |
| Apache Software Foundation in the United States and other countries. |
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