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From bridg...@apache.org
Subject [17/51] [partial] drill-site git commit: Cleaning up deleted content.
Date Sat, 25 Feb 2017 00:15:26 GMT
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-    <li><a href="/docs/connect-a-data-source/">Connect a Data Source</a></li>
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-    <li><a href="/docs/storage-plugin-configuration/">Storage Plugin Configuration</a></li>
-  
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-      <a class="edit-link" href="https://github.com/apache/drill/blob/gh-pages/_docs/connect-a-data-source/035-plugin-configuration-introduction.md" target="_blank"><i class="fa fa-pencil-square-o"></i></a>
-    
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-    <div class="int_title left">
-      <h1>Plugin Configuration Introduction</h1>
-
-    </div>
-
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-
-    <div class="int_text" align="left">
-      
-        <p>When you add or update storage plugin instances on one Drill node in a Drill
-cluster, Drill broadcasts the information to all of the other Drill nodes 
-to have identical storage plugin configurations. You do not need to
-restart any of the Drillbits when you add or update a storage plugin instance.</p>
-
-<p>Use the Drill Web UI to update or add a new storage plugin. Launch a web browser, go to: <code>http://&lt;IP address or host name&gt;:8047</code>, and then go to the Storage tab. </p>
-
-<p>To create and configure a new storage plugin:</p>
-
-<ol>
-<li>Enter a storage name in New Storage Plugin.
-Each storage plugin registered with Drill must have a distinct
-name. Names are case-sensitive.</li>
-<li>Click Create.<br></li>
-<li>In Configuration, configure attributes of the storage plugin, if applicable, using JSON formatting. The Storage Plugin Attributes table in the next section describes attributes typically reconfigured by users. </li>
-<li>Click Create.</li>
-</ol>
-
-<p>Click Update to reconfigure an existing, enabled storage plugin.</p>
-
-<h2 id="storage-plugin-attributes">Storage Plugin Attributes</h2>
-
-<p>The following graphic shows key attributes of a typical dfs storage plugin:<br>
-<img src="/docs/img/connect-plugin.png" alt="dfs plugin"></p>
-
-<h2 id="list-of-attributes-and-definitions">List of Attributes and Definitions</h2>
-
-<p>The following table describes the attributes you configure for storage plugins. 
-<table>
-  <tr>
-    <th>Attribute</th>
-    <th>Example Values</th>
-    <th>Required</th>
-    <th>Description</th>
-  </tr>
-  <tr>
-    <td>&quot;type&quot;</td>
-    <td>&quot;file&quot;<br>&quot;hbase&quot;<br>&quot;hive&quot;<br>&quot;mongo&quot;</td>
-    <td>yes</td>
-    <td>A valid storage plugin type name.</td>
-  </tr>
-  <tr>
-    <td>&quot;enabled&quot;</td>
-    <td>true<br>false</td>
-    <td>yes</td>
-    <td>State of the storage plugin.</td>
-  </tr>
-  <tr>
-    <td>&quot;connection&quot;</td>
-    <td>&quot;classpath:///&quot;<br>&quot;file:///&quot;<br>&quot;mongodb://localhost:27017/&quot;<br>&quot;maprfs:///&quot;</td>
-    <td>implementation-dependent</td>
-    <td>Type of distributed file system, such as HDFS, Amazon S3, or files in your file system.</td>
-  </tr>
-  <tr>
-    <td>&quot;workspaces&quot;</td>
-    <td>null<br>&quot;logs&quot;</td>
-    <td>no</td>
-    <td>One or more unique workspace names. If a workspace name is used more than once, only the last definition is effective. </td>
-  </tr>
-  <tr>
-    <td>&quot;workspaces&quot;. . . &quot;location&quot;</td>
-    <td>&quot;location&quot;: &quot;/Users/johndoe/mydata&quot;<br>&quot;location&quot;: &quot;/tmp&quot;</td>
-    <td>no</td>
-    <td>Full path to a directory on the file system.</td>
-  </tr>
-  <tr>
-    <td>&quot;workspaces&quot;. . . &quot;writable&quot;</td>
-    <td>true<br>false</td>
-    <td>no</td>
-    <td>One or more unique workspace names. If defined more than once, the last workspace name overrides the others.</td>
-  </tr>
-  <tr>
-    <td>&quot;workspaces&quot;. . . &quot;defaultInputFormat&quot;</td>
-    <td>null<br>&quot;parquet&quot;<br>&quot;csv&quot;<br>&quot;json&quot;</td>
-    <td>no</td>
-    <td>Format for reading data, regardless of extension. Default = Parquet.</td>
-  </tr>
-  <tr>
-    <td>&quot;formats&quot;</td>
-    <td>&quot;psv&quot;<br>&quot;csv&quot;<br>&quot;tsv&quot;<br>&quot;parquet&quot;<br>&quot;json&quot;<br>&quot;avro&quot;<br>&quot;maprdb&quot; *</td>
-    <td>yes</td>
-    <td>One or more valid file formats for reading. Drill implicitly detects formats of some files based on extension or bits of data in the file, others require configuration.</td>
-  </tr>
-  <tr>
-    <td>&quot;formats&quot; . . . &quot;type&quot;</td>
-    <td>&quot;text&quot;<br>&quot;parquet&quot;<br>&quot;json&quot;<br>&quot;maprdb&quot; *</td>
-    <td>yes</td>
-    <td>Format type. You can define two formats, csv and psv, as type &quot;Text&quot;, but having different delimiters. </td>
-  </tr>
-  <tr>
-    <td>formats . . . &quot;extensions&quot;</td>
-    <td>[&quot;csv&quot;]</td>
-    <td>format-dependent</td>
-    <td>Extensions of the files that Drill can read.</td>
-  </tr>
-  <tr>
-    <td>&quot;formats&quot; . . . &quot;delimiter&quot;</td>
-    <td>&quot;\t&quot;<br>&quot;,&quot;</td>
-    <td>format-dependent</td>
-    <td>One or more characters that separate records in a delimited text file, such as CSV. Use a 4-digit hex ascii code syntax \uXXXX for a non-printable delimiter. </td>
-  </tr>
-  <tr>
-    <td>&quot;formats&quot; . . . &quot;fieldDelimiter&quot;</td>
-    <td>&quot;,&quot;</td>
-    <td>no</td>
-    <td>A single character that separates each value in a column of a delimited text file.</td>
-  </tr>
-  <tr>
-    <td>&quot;formats&quot; . . . &quot;quote&quot;</td>
-    <td>&quot;&quot;&quot;</td>
-    <td>no</td>
-    <td>A single character that starts/ends a value in a delimited text file.</td>
-  </tr>
-  <tr>
-    <td>&quot;formats&quot; . . . &quot;escape&quot;</td>
-    <td>&quot;`&quot;</td>
-    <td>no</td>
-    <td>A single character that escapes the quote character.</td>
-  </tr>
-  <tr>
-    <td>&quot;formats&quot; . . . &quot;comment&quot;</td>
-    <td>&quot;#&quot;</td>
-    <td>no</td>
-    <td>The line decoration that starts a comment line in the delimited text file.</td>
-  </tr>
-  <tr>
-    <td>&quot;formats&quot; . . . &quot;skipFirstLine&quot;</td>
-    <td>true</td>
-    <td>no</td>
-    <td>To include or omits the header when reading a delimited text file.
-    </td>
-  </tr>
-</table></p>
-
-<p>* Pertains only to distributed drill installations using the mapr-drill package.  </p>
-
-<h2 id="using-the-formats">Using the Formats</h2>
-
-<p>You can use the following attributes when the <code>sys.options</code> property setting <code>exec.storage.enable_new_text_reader</code> is true (the default):</p>
-
-<ul>
-<li>comment<br></li>
-<li>escape<br></li>
-<li>fieldDeliimiter<br></li>
-<li>quote<br></li>
-<li>skipFirstLine</li>
-</ul>
-
-<p>The &quot;formats&quot; apply to all workspaces defined in a storage plugin. A typical use case defines separate storage plugins for different root directories to query the files stored below the directory. An alternative use case defines multiple formats within the same storage plugin and names target files using different extensions to match the formats.</p>
-
-<p>The following example of a storage plugin for reading CSV files with the new text reader includes two formats for reading files having either a <code>csv</code> or <code>csv2</code> extension. The text reader does include the first line of column names in the queries of <code>.csv</code> files but does not include it in queries of <code>.csv2</code> files. </p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">&quot;csv&quot;: {
-  &quot;type&quot;: &quot;text&quot;,
-  &quot;extensions&quot;: [
-    &quot;csv&quot;
-  ],  
-  &quot;delimiter&quot;: &quot;,&quot; 
-},  
-&quot;csv_with_header&quot;: {
-  &quot;type&quot;: &quot;text&quot;,
-  &quot;extensions&quot;: [
-    &quot;csv2&quot;
-  ],  
-  &quot;comment&quot;: &quot;&amp;&quot;,
-  &quot;skipFirstLine&quot;: true,
-  &quot;delimiter&quot;: &quot;,&quot; 
-},  
-</code></pre></div>
-<h2 id="using-other-attributes">Using Other Attributes</h2>
-
-<p>The configuration of other attributes, such as <code>size.calculator.enabled</code> in the hbase plugin and <code>configProps</code> in the hive plugin, are implementation-dependent and beyond the scope of this document.</p>
-
-<h2 id="case-sensitive-names">Case-sensitive Names</h2>
-
-<p>As previously mentioned, workspace and storage plugin names are case-sensitive. For example, the following query uses a storage plugin name <code>dfs</code> and a workspace name <code>clicks</code>. When you refer to <code>dfs.clicks</code> in an SQL statement, use the defined case:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:&gt; USE dfs.clicks;
-</code></pre></div>
-<p>For example, using uppercase letters in the query after defining the storage plugin and workspace names using lowercase letters does not work. </p>
-
-<h2 id="storage-plugin-rest-api">Storage Plugin REST API</h2>
-
-<p>Drill provides a REST API that you can use to create a storage plugin. Use an HTTP POST and pass two properties:</p>
-
-<ul>
-<li><p>name<br>
-The plugin name. </p></li>
-<li><p>config<br>
-The storage plugin definition as you would enter it in the Web UI.</p></li>
-</ul>
-
-<p>For example, this command creates a plugin named myplugin for reading files of an unknown type located on the root of the file system:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">curl -X POST -/json&quot; -d &#39;{&quot;name&quot;:&quot;myplugin&quot;, &quot;config&quot;: {&quot;type&quot;: &quot;file&quot;, &quot;enabled&quot;: false, &quot;connection&quot;: &quot;file:///&quot;, &quot;workspaces&quot;: { &quot;root&quot;: { &quot;location&quot;: &quot;/&quot;, &quot;writable&quot;: false, &quot;defaultInputFormat&quot;: null}}, &quot;formats&quot;: null}}&#39; http://localhost:8047/storage/myplugin.json
-</code></pre></div>
-<h2 id="bootstrapping-a-storage-plugin">Bootstrapping a Storage Plugin</h2>
-
-<p>If you need to add a storage plugin to Drill and do not want to use a web browser, you can create a <a href="https://github.com/apache/drill/blob/master/contrib/storage-hbase/src/main/resources/bootstrap-storage-plugins.json">bootstrap-storage-plugins.json</a> file and include it on the classpath when starting Drill. The storage plugin loads when Drill starts up.</p>
-
-<p>Bootstrapping a storage plugin works only when the first drillbit in the cluster first starts up. After cluster startup, you have to use the REST API or Drill Web UI to add a storage plugin. </p>
-
-<p>If you configure an HBase storage plugin using bootstrap-storage-plugins.json file and HBase is not installed, you might experience a delay when executing the queries. Configure the <a href="http://hbase.apache.org/book.html#config.files">HBase client timeout</a> and retry settings in the config block of HBase plugin instance configuration.</p>
-
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