| |
| |
| <!DOCTYPE html> |
| <html lang="en"> |
| <head> |
| <meta charset="utf-8"> |
| <meta http-equiv="X-UA-Compatible" content="IE=edge"> |
| <meta name="viewport" content="width=device-width, initial-scale=1"> |
| |
| <meta name="description" content="Hadoop Ozone Documentation"> |
| |
| <title>Documentation for Apache Hadoop Ozone</title> |
| |
| |
| <link href="../css/bootstrap.min.css" rel="stylesheet"> |
| |
| |
| <link href="../css/ozonedoc.css" rel="stylesheet"> |
| |
| </head> |
| |
| |
| <body> |
| |
| |
| <nav class="navbar navbar-inverse navbar-fixed-top"> |
| <div class="container-fluid"> |
| <div class="navbar-header"> |
| <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#sidebar" aria-expanded="false" aria-controls="navbar"> |
| <span class="sr-only">Toggle navigation</span> |
| <span class="icon-bar"></span> |
| <span class="icon-bar"></span> |
| <span class="icon-bar"></span> |
| </button> |
| <a href="#" class="navbar-left" style="height: 50px; padding: 5px 5px 5px 0;"> |
| <img src="../ozone-logo-small.png" width="40"/> |
| </a> |
| <a class="navbar-brand hidden-xs" href="#"> |
| Apache Hadoop Ozone/HDDS documentation |
| </a> |
| <a class="navbar-brand visible-xs-inline" href="#">Hadoop Ozone</a> |
| </div> |
| <div id="navbar" class="navbar-collapse collapse"> |
| <ul class="nav navbar-nav navbar-right"> |
| <li><a href="https://github.com/apache/hadoop">Source</a></li> |
| <li><a href="https://hadoop.apache.org">Apache Hadoop</a></li> |
| <li><a href="https://apache.org">ASF</a></li> |
| </ul> |
| </div> |
| </div> |
| </nav> |
| |
| |
| <div class="container-fluid"> |
| <div class="row"> |
| |
| <div class="col-sm-2 col-md-2 sidebar" id="sidebar"> |
| <ul class="nav nav-sidebar"> |
| |
| |
| |
| <li class=""> |
| |
| <a href="../index.html"> |
| |
| |
| |
| <span>Overview</span> |
| </a> |
| </li> |
| |
| |
| |
| <li class=""> |
| |
| <a href="../start.html"> |
| |
| |
| |
| <span>Getting Started</span> |
| </a> |
| </li> |
| |
| |
| |
| <li class=""> |
| |
| <a href="../shell.html"> |
| |
| |
| |
| <span>Command Line Interface</span> |
| </a> |
| </li> |
| |
| |
| |
| <li class=""> |
| |
| <a href="../interface.html"> |
| |
| |
| |
| <span>Programming Interfaces</span> |
| </a> |
| </li> |
| |
| |
| |
| <li class=""> |
| |
| <a href="../security.html"> |
| |
| |
| |
| <span>Security</span> |
| </a> |
| </li> |
| |
| |
| |
| <li class=""> |
| |
| <a href="../concept.html"> |
| |
| |
| |
| <span>Concepts</span> |
| </a> |
| </li> |
| |
| |
| |
| <li class=""> |
| |
| <a href="../beyond.html"> |
| |
| |
| |
| <span>Beyond Basics</span> |
| </a> |
| </li> |
| |
| |
| |
| <li class=""> |
| |
| <a href="../tools.html"> |
| |
| |
| |
| <span>Tools</span> |
| </a> |
| </li> |
| |
| |
| |
| <li class=""> |
| |
| <a href="../recipe.html"> |
| |
| |
| |
| <span>Recipes</span> |
| </a> |
| </li> |
| |
| |
| <li class="visible-xs"><a href="#">References</a> |
| <ul class="nav"> |
| <li><a href="https://github.com/apache/hadoop"><span class="glyphicon glyphicon-new-window" aria-hidden="true"></span> Source</a></li> |
| <li><a href="https://hadoop.apache.org"><span class="glyphicon glyphicon-new-window" aria-hidden="true"></span> Apache Hadoop</a></li> |
| <li><a href="https://apache.org"><span class="glyphicon glyphicon-new-window" aria-hidden="true"></span> ASF</a></li> |
| </ul></li> |
| </ul> |
| |
| </div> |
| |
| <div class="col-sm-10 col-sm-offset-2 col-md-10 col-md-offset-2 main"> |
| |
| |
| |
| <div class="col-md-9"> |
| <nav aria-label="breadcrumb"> |
| <ol class="breadcrumb"> |
| <li class="breadcrumb-item"><a href="../">Home</a></li> |
| <li class="breadcrumb-item" aria-current="page"><a href="../concept.html">Concepts</a></li> |
| <li class="breadcrumb-item active" aria-current="page">Overview</li> |
| </ol> |
| </nav> |
| |
| <div class="col-md-9"> |
| <h1>Overview</h1> |
| </div> |
| |
| |
| |
| <!--- |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You under the Apache License, Version 2.0 |
| (the "License"); you may not use this file except in compliance with |
| the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| --> |
| |
| <p>Ozone is a redundant, distributed object store optimized for Big data |
| workloads. The primary design point of ozone is scalability, and it aims to |
| scale to billions of objects.</p> |
| |
| <p>Ozone separates namespace management and block space management; this helps |
| ozone to scale much better. The namespace is managed by a daemon called |
| <a href="../concept/ozonemanager.html">Ozone Manager </a> (OM), and block space is |
| managed by <a href="../concept/hdds.html">Storage Container Manager</a> (SCM).</p> |
| |
| <p>Ozone consists of volumes, buckets, and keys. |
| A volume is similar to a home directory in the ozone world. |
| Only an administrator can create it.</p> |
| |
| <p>Volumes are used to store buckets. |
| Once a volume is created users can create as many buckets as needed. |
| Ozone stores data as keys which live inside these buckets.</p> |
| |
| <p>Ozone namespace is composed of many storage volumes. |
| Storage volumes are also used as the basis for storage accounting.</p> |
| |
| <p>The block diagram shows the core components of Ozone.</p> |
| |
| <p><img src="ozoneBlockDiagram.png" alt="Architecture diagram" /></p> |
| |
| <p>The Ozone Manager is the name space manager, Storage Container Manager |
| manages the physical and data layer and Recon is the management interface for |
| Ozone.</p> |
| |
| <h2 id="different-perspectives">Different Perspectives</h2> |
| |
| <p><img src="FunctionalOzone.png" alt="FunctionalOzone" /></p> |
| |
| <p>Any distributed system can be viewed from different perspectives. One way to |
| look at Ozone is to imagine it as Ozone Manager as a name space service built on |
| top of HDDS, a distributed block store.</p> |
| |
| <p>Another way to visualize Ozone is to look at the functional layers; we have a |
| metadata data management layer, composed of Ozone Manager and Storage |
| Container Manager.</p> |
| |
| <p>We have a data storage layer, which is basically the data nodes and they are |
| managed by SCM.</p> |
| |
| <p>The replication layer, provided by Ratis is used to replicate metadata (OM and SCM) |
| and also used for consistency when data is modified at the |
| data nodes.</p> |
| |
| <p>We have a management server called Recon, that talks to all other components |
| of Ozone and provides a unified management API and UX for Ozone.</p> |
| |
| <p>We have a protocol bus that allows Ozone to be extended via other |
| protocols. We currently only have S3 protocol support built via Protocol bus. |
| Protocol Bus provides a generic notion that you can implement new file system |
| or object store protocols that call into O3 Native protocol.</p> |
| |
| |
| |
| <a class="btn btn-success btn-lg" href="../concept/ozonemanager.html">Next >></a> |
| |
| </div> |
| </div> |
| </div> |
| </div> |
| |
| |
| |
| |
| <script src="../js/jquery-3.4.1.min.js"></script> |
| <script src="../js/ozonedoc.js"></script> |
| <script src="../js/bootstrap.min.js"></script> |
| |
| |
| </body> |
| |
| </html> |
