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| |
| <h1>Alluxio Interpreter for Apache Zeppelin</h1> |
| |
| <div id="toc"></div> |
| |
| <h2>Overview</h2> |
| |
| <p><a href="http://alluxio.org/">Alluxio</a> is a memory-centric distributed storage system enabling reliable data sharing at memory-speed across cluster frameworks.</p> |
| |
| <h2>Configuration</h2> |
| |
| <table class="table-configuration"> |
| <tr> |
| <th>Name</th> |
| <th>Class</th> |
| <th>Description</th> |
| </tr> |
| <tr> |
| <td>alluxio.master.hostname</td> |
| <td>localhost</td> |
| <td>Alluxio master hostname</td> |
| </tr> |
| <tr> |
| <td>alluxio.master.port</td> |
| <td>19998</td> |
| <td>Alluxio master port</td> |
| </tr> |
| </table> |
| |
| <h2>Enabling Alluxio Interpreter</h2> |
| |
| <p>In a notebook, to enable the <strong>Alluxio</strong> interpreter, click on the <strong>Gear</strong> icon and select <strong>Alluxio</strong>.</p> |
| |
| <h2>Using the Alluxio Interpreter</h2> |
| |
| <p>In a paragraph, use <code>%alluxio</code> to select the <strong>Alluxio</strong> interpreter and then input all commands.</p> |
| <div class="highlight"><pre><code class="bash language-bash" data-lang="bash">%alluxio |
| <span class="nb">help</span> |
| </code></pre></div> |
| <blockquote> |
| <p><strong>Tip :</strong> Use ( Ctrl + . ) for autocompletion.</p> |
| </blockquote> |
| |
| <h2>Interpreter Commands</h2> |
| |
| <p>The <strong>Alluxio</strong> interpreter accepts the following commands.</p> |
| |
| <p><center> |
| <table class="table-configuration"> |
| <tr> |
| <th>Operation</th> |
| <th>Syntax</th> |
| <th>Description</th> |
| </tr> |
| <tr> |
| <td>cat</td> |
| <td>cat "path"</td> |
| <td>Print the content of the file to the console.</td> |
| </tr> |
| <tr> |
| <td>chgrp</td> |
| <td>chgrp "group" "path"</td> |
| <td>Change the group of the directory or file.</td> |
| </tr> |
| <tr> |
| <td>chmod</td> |
| <td>chmod "permission" "path"</td> |
| <td>Change the permission of the directory or file.</td> |
| </tr> |
| <tr> |
| <td>chown</td> |
| <td>chown "owner" "path"</td> |
| <td>Change the owner of the directory or file.</td> |
| </tr> |
| <tr> |
| <td>copyFromLocal</td> |
| <td>copyFromLocal "source path" "remote path"</td> |
| <td>Copy the specified file specified by "source path" to the path specified by "remote path". |
| This command will fail if "remote path" already exists.</td> |
| </tr> |
| <tr> |
| <td>copyToLocal</td> |
| <td>copyToLocal "remote path" "local path"</td> |
| <td>Copy the specified file from the path specified by "remote path" to a local destination.</td> |
| </tr> |
| <tr> |
| <td>count</td> |
| <td>count "path"</td> |
| <td>Display the number of folders and files matching the specified prefix in "path".</td> |
| </tr> |
| <tr> |
| <td>du</td> |
| <td>du "path"</td> |
| <td>Display the size of a file or a directory specified by the input path.</td> |
| </tr> |
| <tr> |
| <td>fileInfo</td> |
| <td>fileInfo "path"</td> |
| <td>Print the information of the blocks of a specified file.</td> |
| </tr> |
| <tr> |
| <td>free</td> |
| <td>free "path"</td> |
| <td>Free a file or all files under a directory from Alluxio. If the file/directory is also |
| in under storage, it will still be available there.</td> |
| </tr> |
| <tr> |
| <td>getCapacityBytes</td> |
| <td>getCapacityBytes</td> |
| <td>Get the capacity of the AlluxioFS.</td> |
| </tr> |
| <tr> |
| <td>getUsedBytes</td> |
| <td>getUsedBytes</td> |
| <td>Get number of bytes used in the AlluxioFS.</td> |
| </tr> |
| <tr> |
| <td>load</td> |
| <td>load "path"</td> |
| <td>Load the data of a file or a directory from under storage into Alluxio.</td> |
| </tr> |
| <tr> |
| <td>loadMetadata</td> |
| <td>loadMetadata "path"</td> |
| <td>Load the metadata of a file or a directory from under storage into Alluxio.</td> |
| </tr> |
| <tr> |
| <td>location</td> |
| <td>location "path"</td> |
| <td>Display a list of hosts that have the file data.</td> |
| </tr> |
| <tr> |
| <td>ls</td> |
| <td>ls "path"</td> |
| <td>List all the files and directories directly under the given path with information such as |
| size.</td> |
| </tr> |
| <tr> |
| <td>mkdir</td> |
| <td>mkdir "path1" ... "pathn"</td> |
| <td>Create directory(ies) under the given paths, along with any necessary parent directories. |
| Multiple paths separated by spaces or tabs. This command will fail if any of the given paths |
| already exist.</td> |
| </tr> |
| <tr> |
| <td>mount</td> |
| <td>mount "path" "uri"</td> |
| <td>Mount the underlying file system path "uri" into the Alluxio namespace as "path". The "path" |
| is assumed not to exist and is created by the operation. No data or metadata is loaded from under |
| storage into Alluxio. After a path is mounted, operations on objects under the mounted path are |
| mirror to the mounted under storage.</td> |
| </tr> |
| <tr> |
| <td>mv</td> |
| <td>mv "source" "destination"</td> |
| <td>Move a file or directory specified by "source" to a new location "destination". This command |
| will fail if "destination" already exists.</td> |
| </tr> |
| <tr> |
| <td>persist</td> |
| <td>persist "path"</td> |
| <td>Persist a file or directory currently stored only in Alluxio to the underlying file system.</td> |
| </tr> |
| <tr> |
| <td>pin</td> |
| <td>pin "path"</td> |
| <td>Pin the given file to avoid evicting it from memory. If the given path is a directory, it |
| recursively pins all the files contained and any new files created within this directory.</td> |
| </tr> |
| <tr> |
| <td>report</td> |
| <td>report "path"</td> |
| <td>Report to the master that a file is lost.</td> |
| </tr> |
| <tr> |
| <td>rm</td> |
| <td>rm "path"</td> |
| <td>Remove a file. This command will fail if the given path is a directory rather than a file.</td> |
| </tr> |
| <tr> |
| <td>setTtl</td> |
| <td>setTtl "time"</td> |
| <td>Set the TTL (time to live) in milliseconds to a file.</td> |
| </tr> |
| <tr> |
| <td>tail</td> |
| <td>tail "path"</td> |
| <td>Print the last 1KB of the specified file to the console.</td> |
| </tr> |
| <tr> |
| <td>touch</td> |
| <td>touch "path"</td> |
| <td>Create a 0-byte file at the specified location.</td> |
| </tr> |
| <tr> |
| <td>unmount</td> |
| <td>unmount "path"</td> |
| <td>Unmount the underlying file system path mounted in the Alluxio namespace as "path". Alluxio |
| objects under "path" are removed from Alluxio, but they still exist in the previously mounted |
| under storage.</td> |
| </tr> |
| <tr> |
| <td>unpin</td> |
| <td>unpin "path"</td> |
| <td>Unpin the given file to allow Alluxio to evict this file again. If the given path is a |
| directory, it recursively unpins all files contained and any new files created within this |
| directory.</td> |
| </tr> |
| <tr> |
| <td>unsetTtl</td> |
| <td>unsetTtl</td> |
| <td>Remove the TTL (time to live) setting from a file.</td> |
| </tr><br> |
| </table> |
| </center></p> |
| |
| <h2>How to test it's working</h2> |
| |
| <p>Be sure to have configured correctly the Alluxio interpreter, then open a new paragraph and type one of the above commands.</p> |
| |
| <p>Below a simple example to show how to interact with Alluxio interpreter. |
| Following steps are performed:</p> |
| |
| <ul> |
| <li>using sh interpreter a new text file is created on local machine</li> |
| <li>using Alluxio interpreter: |
| |
| <ul> |
| <li>is listed the content of the afs (Alluxio File System) root</li> |
| <li>the file previously created is copied to afs</li> |
| <li>is listed again the content of the afs root to check the existence of the new copied file</li> |
| <li>is showed the content of the copied file (using the tail command)</li> |
| <li>the file previously copied to afs is copied to local machine</li> |
| </ul></li> |
| <li> using sh interpreter it's checked the existence of the new file copied from Alluxio and its content is showed</li> |
| </ul> |
| |
| <p><center> |
| <img src="/docs/0.9.0/assets/themes/zeppelin/img/docs-img/alluxio-example.png" alt="Alluxio Interpreter Example"> |
| </center></p> |
| |
| </div> |
| </div> |
| |
| |
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| <!-- <p>© 2021 The Apache Software Foundation</p>--> |
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