| <!DOCTYPE html> |
| |
| |
| <html xmlns="http://www.w3.org/1999/xhtml"> |
| <head> |
| <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> |
| |
| <title>DistributedLog Operations — DistributedLog 1.0 documentation</title> |
| |
| <link rel="stylesheet" href="../_static/override.css" type="text/css" /> |
| <link rel="stylesheet" href="../_static/pygments.css" type="text/css" /> |
| <link rel="stylesheet" href="../_static/bootstrap-3.1.0/css/bootstrap.min.css" type="text/css" /> |
| <link rel="stylesheet" href="../_static/bootstrap-3.1.0/css/bootstrap-theme.min.css" type="text/css" /> |
| <link rel="stylesheet" href="../_static/css/featherlight.min.css" type="text/css" /> |
| <link rel="stylesheet" href="../_static/css/docbird.css" type="text/css" /> |
| <link rel="stylesheet" href="../_static/css/docbird-xs.css" type="text/css" /> |
| <link rel="stylesheet" href="../_static/css/jquery.rateyo.min.css" type="text/css" /> |
| <link rel="stylesheet" href="../_static/css/selection-sharer.css" type="text/css" /> |
| |
| <script type="text/javascript"> |
| var DOCUMENTATION_OPTIONS = { |
| URL_ROOT: '../', |
| VERSION: '1.0', |
| COLLAPSE_INDEX: false, |
| FILE_SUFFIX: '.html', |
| HAS_SOURCE: true |
| }; |
| </script> |
| <script type="text/javascript" src="../_static/jquery.js"></script> |
| <script type="text/javascript" src="../_static/underscore.js"></script> |
| <script type="text/javascript" src="../_static/doctools.js"></script> |
| <script type="text/javascript" src="../_static/bootstrap-3.1.0/js/bootstrap.min.js"></script> |
| <script type="text/javascript" src="../_static/js/bootstrap-docbird.js"></script> |
| <script type="text/javascript" src="../_static/js/jquery-1.11.0.min.js"></script> |
| <script type="text/javascript" src="../_static/js/jquery-fix.js"></script> |
| <script type="text/javascript" src="../_static/js/featherlight.min.js"></script> |
| <script type="text/javascript" src="../_static/js/ifvisible.js"></script> |
| <script type="text/javascript" src="../_static/js/timeme.js"></script> |
| <script type="text/javascript" src="../_static/js/jquery.rateyo.min.js"></script> |
| <script type="text/javascript" src="../_static/js/js.cookie.js"></script> |
| <link rel="shortcut icon" href="../_static/docbird.ico"/> |
| <link rel="top" title="DistributedLog 1.0 documentation" href="../index.html" /> |
| <link rel="up" title="Deployment & Administration" href="main.html" /> |
| <link rel="next" title="Performance Tuning" href="performance.html" /> |
| <link rel="prev" title="Cluster Setup & Deployment" href="deployment.html" /> |
| <meta charset='utf-8'> |
| <meta http-equiv='X-UA-Compatible' content='IE=edge,chrome=1'> |
| <meta name='viewport' content='width=device-width, initial-scale=1.0, maximum-scale=1'> |
| <meta name="apple-mobile-web-app-capable" content="yes"> |
| |
| <meta property="docbird:project" content="DistributedLog" /> |
| |
| </head> |
| <body> |
| <div class="navbar navbar-default navbar-fixed-top" role="navigation"> |
| <div class="container-fluid"> |
| <div class="row db-header"> |
| <div class="col-sm-3 col-md-3 col-lg-3 hidden-xs db-header-controls"> |
| <a href="/" alt="Back to Docbird"> |
| <div class="db-home-button"> |
| <span class="glyphicon glyphicon-home"></span> |
| </div> |
| </a> |
| |
| <form action="../search.html" method="get" class="db-searchbox-form"> |
| <div class="form-group"> |
| <input type="text" name="q" class="form-control db-searchbox-input" placeholder="Search DistributedLog" /> |
| </div> |
| <input type="hidden" name="check_keywords" value="yes" /> |
| <input type="hidden" name="area" value="default" /> |
| </form> |
| |
| </div> |
| <div class="col-sm-7 col-md-7 col-lg-7 col-xs-12 db-header-info"> |
| <div class="visible-xs"> |
| <a href="/" alt="Back to Docbird"> |
| <div class="db-home-button"> |
| <span class="glyphicon glyphicon-home"></span> |
| </div> |
| </a> |
| </div> |
| <div class="visible-xs db-xs-menu-button"> |
| <div class="navbar-header"> |
| <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#db-xs-menu"> |
| <span class="sr-only">Toggle navigation</span> |
| <span class="icon-bar"></span> |
| <span class="icon-bar"></span> |
| <span class="icon-bar"></span> |
| </button> |
| </div> |
| </div> |
| <div class="db-header-projectname"> |
| <h1><a href="../index.html">DistributedLog</a></h1> |
| </div> |
| </div> |
| </div> |
| <div class="row db-xs-menu hidden-sm hidden-md hidden-lg |
| collapse" id="db-xs-menu"> |
| |
| <form action="../search.html" method="get" class="db-searchbox-form"> |
| <div class="form-group"> |
| <input type="text" name="q" class="form-control db-searchbox-input" placeholder="Search DistributedLog" /> |
| </div> |
| <input type="hidden" name="check_keywords" value="yes" /> |
| <input type="hidden" name="area" value="default" /> |
| </form> |
| |
| <div class="db-toc" role="complementary"> |
| <ul class="current"> |
| <li class="toctree-l1"><a class="reference internal" href="../download.html">Releases</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../download.html#rc1">0.3.51-RC1</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../download.html#rc0">0.3.51-RC0</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../basics/main.html">Getting Started</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../basics/introduction.html">Introduction</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../basics/quickstart.html">Quick Start</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../api/main.html">API</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../api/core.html">Core Library API</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../api/proxy.html">Write Proxy Client API</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../api/practice.html">Best Practices</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../configuration/main.html">Configuration</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../configuration/core.html">Core Library Configuration</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../configuration/proxy.html">Write Proxy Configuration</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../configuration/client.html">Client Configuration</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../configuration/perlog.html">Per Stream Configuration</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../considerations/main.html">Considerations</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../considerations/main.html#consistency-durability-and-ordering">Consistency, Durability and Ordering</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../considerations/main.html#partitioning">Partitioning</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../considerations/main.html#processing-semantics">Processing Semantics</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../architecture/main.html">Architecture</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../architecture/main.html#data-model">Data Model</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../architecture/main.html#software-stack">Software Stack</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../architecture/main.html#lifecyle-of-records">Lifecyle of records</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../design/main.html">Detail Design</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../design/main.html#consistency">Consistency</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../design/main.html#streaming-reads">Streaming Reads</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../design/main.html#logsegment-lifecycle">LogSegment Lifecycle</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../globalreplicatedlog/main.html">Global Replicated Log</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../globalreplicatedlog/main.html#region-aware-data-placement-policy">Region Aware Data Placement Policy</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../globalreplicatedlog/main.html#cross-region-speculative-reads">Cross Region Speculative Reads</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../implementation/main.html">Implementation</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../implementation/storage.html">Storage</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1 current"><a class="reference internal" href="main.html">Deployment & Administration</a><ul class="current"> |
| <li class="toctree-l2"><a class="reference internal" href="deployment.html">Cluster Setup & Deployment</a></li> |
| <li class="toctree-l2 current"><a class="current reference internal" href="">DistributedLog Operations</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="performance.html">Performance Tuning</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="hardware.html">Hardware</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="monitoring.html">Monitoring</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="zookeeper.html">ZooKeeper</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="bookkeeper.html">BookKeeper</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../performance/main.html">Performance</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../references/main.html">References</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../references/configuration.html">Configuration Settings</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../references/metrics.html">Metrics</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../references/features.html">Features</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../tutorials/main.html">Tutorials</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../tutorials/main.html#basic">Basic</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../tutorials/main.html#messaging">Messaging</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../tutorials/main.html#replicated-state-machines">Replicated State Machines</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../tutorials/main.html#analytics">Analytics</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../developer/main.html">Developer</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../developer/release.html">Release</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../faq.html">FAQ</a></li> |
| </ul> |
| |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="container"> |
| <div class="row"> |
| <div style="z-index: 1" class="col-xs-12 col-sm-12 col-md-12 col-lg-12"> |
| <style> |
| .overflow-container { |
| display: none; |
| } |
| .overflow-toggle { |
| text-decoration: none; |
| border-bottom: none; |
| border-radius: 4px; |
| border: 1px solid #eee; |
| padding: 1px 3px 3px; |
| color: #888; |
| font-weight: normal; |
| background-color: linen; |
| line-height: 1.85em; |
| cursor: pointer; |
| } |
| .overflow-toggle:hover { |
| color: #333; |
| border-color: #ccc; |
| background-color: beige; |
| } |
| </style> |
| <script> |
| $(function(){ |
| $('.overflow-toggle').on('click', function(){ |
| $(this).next().toggle(); |
| }); |
| }); |
| </script> |
| <div class="db-project-header-container"> |
| <div class="row"> |
| |
| <div class="db-project-info col-lg-12 col-md-12 col-sm-12 col-xs-12"> |
| <h1> |
| <a href="../index.html">DistributedLog</a> |
| |
| </h1> |
| |
| <div class="db-code-link"> |
| <a href="git@github.com:twitter/distributedlog.git/tree/master/" target="_blank">git@github.com:twitter/distributedlog.git/tree/master/</a> |
| </div> |
| |
| |
| </div> |
| </div> |
| |
| <div class="row db-project-links-row"> |
| <div class=" col-sm-3 col-md-3 col-lg-3 db-project-link-column"> |
| <div class="db-hashtag-container"> |
| |
| <span class="db-project-link-label">OWNERS</span> |
| |
| <em>None</em> |
| |
| |
| </div> |
| </div> |
| <div class="col-sm-3 col-md-3 col-lg-3 db-project-link-column"> |
| <div class="db-hashtag-container"> |
| |
| <span class="db-project-link-label">TAGS</span> |
| |
| <em><a class="db-hashtag" href="/?q=tags:%23uses_maven">#uses_maven</a></em> |
| |
| |
| </div> |
| </div> |
| <div class="col-sm-3 col-md-3 col-lg-3 db-project-link-column"> |
| <span class="db-project-link-label">HEALTH</span> |
| |
| <h3 style="margin-top: 0"> |
| <!-- <a href="/techdocs/checklist.html" class="label label-success">--> |
| <a href="/report/distributedlog" class=""> |
| 9.0 / 10 |
| <span style="margin-left: .25em" class="glyphicon glyphicon-ok"></span> |
| </a> |
| |
| </h3> |
| </div> |
| <div class="col-sm-3 col-md-3 col-lg-3 db-project-link-column"> |
| <span class="db-project-link-label">RATING</span> |
| <div id="rateYo"></div> |
| </div> |
| </div> |
| |
| </div> |
| </div> |
| <div class="col-xs-12 col-sm-8 col-md-8 col-lg-8"> |
| <div class="db-content-body"> |
| |
| <div class="section" id="distributedlog-operations"> |
| <h1>DistributedLog Operations<a class="headerlink" href="#distributedlog-operations" title="Permalink to this headline">¶</a></h1> |
| <div class="section" id="feature-provider"> |
| <h2>Feature Provider<a class="headerlink" href="#feature-provider" title="Permalink to this headline">¶</a></h2> |
| <p>DistributedLog uses a <cite>feature-provider</cite> library provided by Apache BookKeeper for managing features |
| dynamically at runtime. It is a <a class="reference external" href="https://en.wikipedia.org/wiki/Feature_toggle">feature-flag</a> system used to proportionally control what features |
| are enabled for the system. In other words, it is a way of altering the control in a system without |
| restarting it. It can be used during all stages of development, its most visible use case is on |
| production. For instance, during a production release, you can enable or disable individual features, |
| control the data flow through the system, thereby minimizing risk of system failure in real time.</p> |
| <p>This <cite>feature-provider</cite> interface is pluggable and easy to integrate with any configuration management |
| system.</p> |
| <div class="section" id="api"> |
| <h3>API<a class="headerlink" href="#api" title="Permalink to this headline">¶</a></h3> |
| <p><cite>FeatureProvider</cite> is a provider that manages features under different scopes. The provider is responsible |
| for loading features dynamically at runtime. A <cite>Feature</cite> is a numeric flag that control how much percentage |
| of this feature will be available to the system - the number is called <cite>availability</cite>.</p> |
| <div class="highlight-python"><pre>Feature.name() => returns the name of this feature |
| Feature.availability() => returns the availability of this feature |
| Feature.isAvailable() => returns true if its availability is larger than 0; otherwise false</pre> |
| <div style='display:none;' class='raw-code'><pre>Feature.name() => returns the name of this feature |
| Feature.availability() => returns the availability of this feature |
| Feature.isAvailable() => returns true if its availability is larger than 0; otherwise false</pre> |
| </div></div> |
| <p>It is easy to obtain a feature from the provider by just providing a feature name.</p> |
| <div class="highlight-python"><pre>FeatureProvider provider = ...; |
| Feature feature = provider.getFeature("feature1"); // returns the feature named 'feature1'</pre> |
| <div style='display:none;' class='raw-code'><pre>FeatureProvider provider = ...; |
| Feature feature = provider.getFeature("feature1"); // returns the feature named 'feature1'</pre> |
| </div></div> |
| <p>The <cite>FeatureProvider</cite> is scopable to allow creating features in a hierarchical way. For example, if a system |
| is comprised of two subsystems, one is <em>cache</em>, while the other one is <em>storage</em>. so the features belong to |
| different subsystems can be created under different scopes.</p> |
| <div class="highlight-python"><pre>FeatureProvider provider = ...; |
| FeatureProvider cacheFeatureProvider = provider.scope("cache"); |
| FeatureProvider storageFeatureProvider = provider.scope("storage"); |
| Feature writeThroughFeature = cacheFeatureProvider.getFeature("write_through"); |
| Feature duralWriteFeature = storageFeatureProvider.getFeature("dural_write"); |
| |
| // so the available features under `provider` are: (assume scopes are separated by '.') |
| // - 'cache.write_through' |
| // - 'storage.dural_write'</pre> |
| <div style='display:none;' class='raw-code'><pre>FeatureProvider provider = ...; |
| FeatureProvider cacheFeatureProvider = provider.scope("cache"); |
| FeatureProvider storageFeatureProvider = provider.scope("storage"); |
| Feature writeThroughFeature = cacheFeatureProvider.getFeature("write_through"); |
| Feature duralWriteFeature = storageFeatureProvider.getFeature("dural_write"); |
| |
| // so the available features under `provider` are: (assume scopes are separated by '.') |
| // - 'cache.write_through' |
| // - 'storage.dural_write'</pre> |
| </div></div> |
| <p>The feature provider could be passed to <cite>DistributedLogNamespaceBuilder</cite> when building the namespace, |
| thereby it would be used for controlling the features exposed under <cite>DistributedLogNamespace</cite>.</p> |
| <div class="highlight-python"><pre>FeatureProvider rootProvider = ...; |
| FeatureProvider dlFeatureProvider = rootProvider.scope("dlog"); |
| DistributedLogNamespace namespace = DistributedLogNamespaceBuilder.newBuilder() |
| .uri(uri) |
| .conf(conf) |
| .featureProvider(dlFeatureProvider) |
| .build();</pre> |
| <div style='display:none;' class='raw-code'><pre>FeatureProvider rootProvider = ...; |
| FeatureProvider dlFeatureProvider = rootProvider.scope("dlog"); |
| DistributedLogNamespace namespace = DistributedLogNamespaceBuilder.newBuilder() |
| .uri(uri) |
| .conf(conf) |
| .featureProvider(dlFeatureProvider) |
| .build();</pre> |
| </div></div> |
| <p>The feature provider is loaded by reflection on distributedlog write proxy server. You could specify |
| the feature provider class name as below. Otherwise it would use <cite>DefaultFeatureProvider</cite>, which disables |
| all the features by default.</p> |
| <div class="highlight-python"><div class="highlight"><pre><span></span><span class="n">featureProviderClass</span><span class="o">=</span><span class="n">com</span><span class="o">.</span><span class="n">twitter</span><span class="o">.</span><span class="n">distributedlog</span><span class="o">.</span><span class="n">feature</span><span class="o">.</span><span class="n">DynamicConfigurationFeatureProvider</span> |
| </pre></div> |
| <div style='display:none;' class='raw-code'><pre>featureProviderClass=com.twitter.distributedlog.feature.DynamicConfigurationFeatureProvider</pre> |
| </div></div> |
| </div> |
| <div class="section" id="configuration-based-feature-provider"> |
| <h3>Configuration Based Feature Provider<a class="headerlink" href="#configuration-based-feature-provider" title="Permalink to this headline">¶</a></h3> |
| <p>Beside <cite>DefaultFeatureProvider</cite>, distributedlog also provides a file-based feature provider - it loads |
| the features from properties files.</p> |
| <p>All the features and their availabilities are configured in properties file format. For example,</p> |
| <div class="highlight-python"><div class="highlight"><pre><span></span><span class="n">cache</span><span class="o">.</span><span class="n">write_through</span><span class="o">=</span><span class="mi">100</span> |
| <span class="n">storage</span><span class="o">.</span><span class="n">dural_write</span><span class="o">=</span><span class="mi">0</span> |
| </pre></div> |
| <div style='display:none;' class='raw-code'><pre>cache.write_through=100 |
| storage.dural_write=0</pre> |
| </div></div> |
| <p>You could configure <cite>featureProviderClass</cite> in distributedlog configuration file by setting it to |
| <cite>com.twitter.distributedlog.feature.DynamicConfigurationFeatureProvider</cite> to enable file-based feature |
| provider. The feature provider will load the features from two files, one is base config file configured |
| by <cite>fileFeatureProviderBaseConfigPath</cite>, while the other one is overlay config file configured by |
| <cite>fileFeatureProviderOverlayConfigPath</cite>. Current implementation doesn't differentiate these two files |
| too much other than the <cite>overlay</cite> config will override the settings in <cite>base</cite> config. It is recommended |
| to have a base config file for storing the default availability values for your system and dynamically |
| adjust the availability values in overlay config file.</p> |
| <div class="highlight-python"><pre>featureProviderClass=com.twitter.distributedlog.feature.DynamicConfigurationFeatureProvider |
| fileFeatureProviderBaseConfigPath=/path/to/base/config |
| fileFeatureProviderOverlayConfigPath=/path/to/overlay/config |
| // how frequent we reload the config files |
| dynamicConfigReloadIntervalSec=60</pre> |
| <div style='display:none;' class='raw-code'><pre>featureProviderClass=com.twitter.distributedlog.feature.DynamicConfigurationFeatureProvider |
| fileFeatureProviderBaseConfigPath=/path/to/base/config |
| fileFeatureProviderOverlayConfigPath=/path/to/overlay/config |
| // how frequent we reload the config files |
| dynamicConfigReloadIntervalSec=60</pre> |
| </div></div> |
| </div> |
| <div class="section" id="available-features"> |
| <h3>Available Features<a class="headerlink" href="#available-features" title="Permalink to this headline">¶</a></h3> |
| <p>Check the <a class="reference internal" href="../references/features.html"><em>Features</em></a> reference page for the features exposed by DistributedLog.</p> |
| </div> |
| </div> |
| <div class="section" id="dlog"> |
| <h2><cite>dlog</cite><a class="headerlink" href="#dlog" title="Permalink to this headline">¶</a></h2> |
| <p>A CLI is provided for inspecting DistributedLog streams and metadata.</p> |
| <div class="highlight-bash"><div class="highlight"><pre><span></span>dlog |
| JMX enabled by default |
| Usage: dlog <command> |
| where <span class="nb">command</span> is one of: |
| <span class="nb">local</span> Run distributedlog sandbox |
| example Run distributedlog example |
| tool Run distributedlog tool |
| proxy_tool Run distributedlog proxy tool to interact with proxies |
| balancer Run distributedlog balancer |
| admin Run distributedlog admin tool |
| <span class="nb">help</span> This <span class="nb">help</span> message |
| |
| or <span class="nb">command</span> is the full name of a class with a defined main<span class="o">()</span> method. |
| |
| Environment variables: |
| DLOG_LOG_CONF Log4j configuration file <span class="o">(</span>default <span class="nv">$HOME</span>/src/distributedlog/distributedlog-service/conf/log4j.properties<span class="o">)</span> |
| DLOG_EXTRA_OPTS Extra options to be passed to the jvm |
| DLOG_EXTRA_CLASSPATH Add extra paths to the dlog classpath |
| </pre></div> |
| <div style='display:none;' class='raw-code'><pre>dlog |
| JMX enabled by default |
| Usage: dlog <command> |
| where command is one of: |
| local Run distributedlog sandbox |
| example Run distributedlog example |
| tool Run distributedlog tool |
| proxy_tool Run distributedlog proxy tool to interact with proxies |
| balancer Run distributedlog balancer |
| admin Run distributedlog admin tool |
| help This help message |
| |
| or command is the full name of a class with a defined main() method. |
| |
| Environment variables: |
| DLOG_LOG_CONF Log4j configuration file (default $HOME/src/distributedlog/distributedlog-service/conf/log4j.properties) |
| DLOG_EXTRA_OPTS Extra options to be passed to the jvm |
| DLOG_EXTRA_CLASSPATH Add extra paths to the dlog classpath</pre> |
| </div></div> |
| <p>These variable can also be set in conf/dlogenv.sh</p> |
| <div class="section" id="create-a-stream"> |
| <h3>Create a stream<a class="headerlink" href="#create-a-stream" title="Permalink to this headline">¶</a></h3> |
| <p>To create a stream:</p> |
| <div class="highlight-bash"><div class="highlight"><pre><span></span>dlog tool create -u <DL URI> -r <STREAM PREFIX> -e <STREAM EXPRESSION> |
| </pre></div> |
| <div style='display:none;' class='raw-code'><pre>dlog tool create -u <DL URI> -r <STREAM PREFIX> -e <STREAM EXPRESSION></pre> |
| </div></div> |
| </div> |
| <div class="section" id="list-the-streams"> |
| <h3>List the streams<a class="headerlink" href="#list-the-streams" title="Permalink to this headline">¶</a></h3> |
| <p>To list all the streams under a given DistributedLog namespace:</p> |
| <div class="highlight-bash"><div class="highlight"><pre><span></span>dlog tool list -u <DL URI> |
| </pre></div> |
| <div style='display:none;' class='raw-code'><pre>dlog tool list -u <DL URI></pre> |
| </div></div> |
| </div> |
| <div class="section" id="show-stream-s-information"> |
| <h3>Show stream's information<a class="headerlink" href="#show-stream-s-information" title="Permalink to this headline">¶</a></h3> |
| <p>To view the metadata associated with a stream:</p> |
| <div class="highlight-bash"><div class="highlight"><pre><span></span>dlog tool show -u <DL URI> -s <STREAM NAME> |
| </pre></div> |
| <div style='display:none;' class='raw-code'><pre>dlog tool show -u <DL URI> -s <STREAM NAME></pre> |
| </div></div> |
| </div> |
| <div class="section" id="dump-a-stream"> |
| <h3>Dump a stream<a class="headerlink" href="#dump-a-stream" title="Permalink to this headline">¶</a></h3> |
| <p>To dump the items inside a stream:</p> |
| <div class="highlight-bash"><div class="highlight"><pre><span></span>dlog tool dump -u <DL URI> -s <STREAM NAME> -o <START TXN ID> -l <NUM RECORDS> |
| </pre></div> |
| <div style='display:none;' class='raw-code'><pre>dlog tool dump -u <DL URI> -s <STREAM NAME> -o <START TXN ID> -l <NUM RECORDS></pre> |
| </div></div> |
| </div> |
| <div class="section" id="delete-a-stream"> |
| <h3>Delete a stream<a class="headerlink" href="#delete-a-stream" title="Permalink to this headline">¶</a></h3> |
| <p>To delete a stream, run:</p> |
| <div class="highlight-bash"><div class="highlight"><pre><span></span>dlog tool delete -u <DL URI> -s <STREAM NAME> |
| </pre></div> |
| <div style='display:none;' class='raw-code'><pre>dlog tool delete -u <DL URI> -s <STREAM NAME></pre> |
| </div></div> |
| </div> |
| <div class="section" id="truncate-a-stream"> |
| <h3>Truncate a stream<a class="headerlink" href="#truncate-a-stream" title="Permalink to this headline">¶</a></h3> |
| <p>Truncate the streams under a given DistributedLog namespace. You could specify a filter to match the streams that you want to truncate.</p> |
| <p>There is a difference between the <tt class="docutils literal"><span class="pre">truncate</span></tt> and <tt class="docutils literal"><span class="pre">delete</span></tt> command. When you issue a <tt class="docutils literal"><span class="pre">truncate</span></tt>, the data will be purge without removing the streams. A <tt class="docutils literal"><span class="pre">delete</span></tt> will delete the stream. You can pass the flag <tt class="docutils literal"><span class="pre">-delete</span></tt> to the <tt class="docutils literal"><span class="pre">truncate</span></tt> command to also delete the streams.</p> |
| <div class="highlight-bash"><div class="highlight"><pre><span></span>dlog tool truncate -u <DL URI> |
| </pre></div> |
| <div style='display:none;' class='raw-code'><pre>dlog tool truncate -u <DL URI></pre> |
| </div></div> |
| </div> |
| </div> |
| </div> |
| |
| |
| </div> |
| </div> |
| <div class="hidden-xs col-sm-3 col-md-3 col-md-offset-1 col-lg-3 db-sidebar"> |
| |
| <div class="db-toc" role="complementary"> |
| <ul class="current"> |
| <li class="toctree-l0 current"><a class="current reference internal" href="../index.html">DistributedLog</a></li> |
| </ul> |
| <ul class="current"> |
| <li class="toctree-l1"><a class="reference internal" href="../download.html">Releases</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../download.html#rc1">0.3.51-RC1</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../download.html#rc0">0.3.51-RC0</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../basics/main.html">Getting Started</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../basics/introduction.html">Introduction</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../basics/quickstart.html">Quick Start</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../api/main.html">API</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../api/core.html">Core Library API</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../api/proxy.html">Write Proxy Client API</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../api/practice.html">Best Practices</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../configuration/main.html">Configuration</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../configuration/core.html">Core Library Configuration</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../configuration/proxy.html">Write Proxy Configuration</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../configuration/client.html">Client Configuration</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../configuration/perlog.html">Per Stream Configuration</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../considerations/main.html">Considerations</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../considerations/main.html#consistency-durability-and-ordering">Consistency, Durability and Ordering</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../considerations/main.html#partitioning">Partitioning</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../considerations/main.html#processing-semantics">Processing Semantics</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../architecture/main.html">Architecture</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../architecture/main.html#data-model">Data Model</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../architecture/main.html#software-stack">Software Stack</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../architecture/main.html#lifecyle-of-records">Lifecyle of records</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../design/main.html">Detail Design</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../design/main.html#consistency">Consistency</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../design/main.html#streaming-reads">Streaming Reads</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../design/main.html#logsegment-lifecycle">LogSegment Lifecycle</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../globalreplicatedlog/main.html">Global Replicated Log</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../globalreplicatedlog/main.html#region-aware-data-placement-policy">Region Aware Data Placement Policy</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../globalreplicatedlog/main.html#cross-region-speculative-reads">Cross Region Speculative Reads</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../implementation/main.html">Implementation</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../implementation/storage.html">Storage</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1 current"><a class="reference internal" href="main.html">Deployment & Administration</a><ul class="current"> |
| <li class="toctree-l2"><a class="reference internal" href="deployment.html">Cluster Setup & Deployment</a></li> |
| <li class="toctree-l2 current"><a class="current reference internal" href="">DistributedLog Operations</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="performance.html">Performance Tuning</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="hardware.html">Hardware</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="monitoring.html">Monitoring</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="zookeeper.html">ZooKeeper</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="bookkeeper.html">BookKeeper</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../performance/main.html">Performance</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../references/main.html">References</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../references/configuration.html">Configuration Settings</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../references/metrics.html">Metrics</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../references/features.html">Features</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../tutorials/main.html">Tutorials</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../tutorials/main.html#basic">Basic</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../tutorials/main.html#messaging">Messaging</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../tutorials/main.html#replicated-state-machines">Replicated State Machines</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../tutorials/main.html#analytics">Analytics</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../developer/main.html">Developer</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../developer/release.html">Release</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../faq.html">FAQ</a></li> |
| </ul> |
| |
| <span id="last"></span> |
| </div> |
| |
| </div> |
| <!-- <div id="slidebox"> --> |
| <!-- <button id="slidebox_close" type="button" class="close">×</button> --> |
| <!-- <p>Rate This Page</p> --> |
| <!-- <div id="rateYo"></div> --> |
| <!-- <p>Comment</p> |
| <input type="text" name="comment"></input> |
| <button>Submit</button> --> |
| <!-- </div> --> |
| </div> |
| </div> |
| <footer class="footer"> |
| <div class="container-fluid"> |
| <div class="row"> |
| <div class="col-md-10 col-md-offset-1"> |
| <p class="pull-right"> |
| <a href="#">Back to top</a> |
| |
| <br/> |
| |
| <div id="sourcelink"> |
| <a href="git@github.com:twitter/distributedlog.git/tree/master/docs/operations/operations.rst" |
| rel="nofollow">Source</a> |
| |
| <a href="../_sources/operations/operations.txt" |
| rel="nofollow">Raw</a> |
| <a href="../__docbird-build.log" |
| rel="nofollow">Build Log</a> |
| <a href="/report/stats/distributedlog:distributedlog" |
| rel="nofollow">Stats</a> |
| </div> |
| </p> |
| <p> |
| Built and hosted by <a href="/">DocBird</a>. |
| </p> |
| </div> |
| </div> |
| </div> |
| </footer> |
| <script type="text/javascript" src="../_static/js/docbird.js"></script> |
| <script type="text/javascript"> |
| var _gaq = _gaq || []; |
| _gaq.push(['_setAccount', 'UA-30775-8']); |
| _gaq.push(['_trackPageview']); |
| |
| (function() { |
| var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; |
| ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; |
| var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); |
| })(); |
| </script> |
| <!-- <script type="text/javascript" src="//s/d41d8cd98f00b204e9800998ecf8427e/en_US-tbnx1s-1988229788/6163/97/1.4.3/_/download/batch/com.atlassian.jira.collector.plugin.jira-issue-collector-plugin:issuecollector/com.atlassian.jira.collector.plugin.jira-issue-collector-plugin:issuecollector.js?collectorId=e62237fc"></script> |
| --> |
| |
| <script type="text/javascript"> |
| $(document).ready(function () { |
| // track user activity time (from https://github.com/jasonzissman/TimeMe.js) |
| TimeMe.setIdleDurationInSeconds(30); |
| TimeMe.setCurrentPageName("my-home-page"); |
| TimeMe.initialize(); |
| |
| // record page visit event when user leaves the page |
| window.onbeforeunload = function (event) { |
| xmlhttp=new XMLHttpRequest(); |
| xmlhttp.withCredentials = true; |
| xmlhttp.open("POST", "/event/distributedlog:distributedlog/visit", false); |
| xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); |
| var event_data = { |
| total_time_reading: TimeMe.getTimeOnCurrentPageInSeconds(), |
| page: window.location.href |
| }; |
| //alert("send: " + $.param(event_data)); |
| xmlhttp.send($.param(event_data)); |
| }; |
| |
| // ask user for page rating after 20 seconds |
| // setTimeout(function(){ |
| // alert("Rate this page!"); |
| // }, 20000); |
| }); |
| </script> |
| <!-- <style> |
| #slidebox{ |
| width: 250px; |
| height: 90px; |
| padding: 10px; |
| background-color: #fff; |
| border: 1px solid #ccc; |
| position: fixed; |
| bottom: 3px; |
| right: -280px; |
| z-index: 1; |
| } |
| #slidebox .close{ |
| margin-top: -5px; |
| opacity: 0.5; |
| } |
| #slidebox .close:hover{ |
| opacity: 0.7; |
| } |
| </style> --> |
| <script type="text/javascript"> |
| $(function() { |
| // $(window).scroll(function(){ |
| // var distanceTop = $('#last').offset().top - $(window).height(); |
| |
| // if ($(window).scrollTop() > distanceTop) |
| // $('#slidebox').animate({'right':'3px'},300); |
| // else |
| // $('#slidebox').stop(true).animate({'right':'-280px'},100); |
| // }); |
| |
| // $('#slidebox .close').bind('click',function(){ |
| // $(this).parent().remove(); |
| // }); |
| |
| $("#rateYo").rateYo({ |
| normalFill: "#A0A0A0", |
| halfStar: true, |
| rating: (Cookies.get('docbird.rating.distributedlog.distributedlog') || 0.0) |
| }).on("rateyo.set", function (e, data) { |
| var event_data = { |
| comment: '', // see todo note below |
| rating: data.rating, |
| page: window.location.href |
| }; |
| Cookies.get('docbird.rating.distributedlog.distributedlog', data.rating) |
| $.post('/event/distributedlog:distributedlog/rating', event_data) |
| // xmlhttp=new XMLHttpRequest(); |
| // xmlhttp.withCredentials = true; |
| // var event_data = { |
| // comment: '', // see todo note below |
| // rating: data.rating, |
| // page: window.location.href |
| // }; |
| // xmlhttp.open("GET", "/event/distributedlog/rating?" + $.param(event_data), false); |
| // xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); |
| // // todo: implement comment form in rating slide out, |
| // // and instead of hooking this event, include a submit button, |
| // // and read the rating with rating() method |
| |
| // // alert("send: " + $.param(event_data)); |
| // xmlhttp.send(); |
| |
| }); |
| |
| }); |
| </script> |
| <script src="_static/js/selection-sharer.js"></script> |
| <script> |
| $('.db-content-body').selectionSharer(); |
| </script> |
| </body> |
| </html> |