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| <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></nav> <ul class="sidebar-links"><li><section class="sidebar-group depth-0"><p class="sidebar-heading open"><span>IoTDB User Guide (V0.9.x)</span> <!----></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>0-Get Started</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>1-Overview</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>2-Concept</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>3-Server</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>4-Client</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>5-Operation Manual</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>6-System Tools</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>7-Ecosystem Integration</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>8-System Design</span> <span class="arrow right"></span></p> <!----></section></li></ul> </aside> <main class="page"> <div class="content content__default"><h1 id="logvisualizer"><a href="#logvisualizer" class="header-anchor">#</a> LogVisualizer</h1> <ul><li><a href="#LogVisualizer">LogVisualizer</a></li> <li><a href="#introduction">Introduction</a></li> <li><a href="#preparation">Preparation</a></li> <li><a href="#Usage(GUI)">Usage(GUI)</a> <ul><li>[Run the gui](#Run the gui)</li> <li>[Choose a log file](#Choose the log file(s))</li> <li>[Choose a parser property file](#Choose a parser property file)</li> <li>[Load logs](#Load logs)</li> <li>[Create new plans](#Create new plans)</li> <li>[Edit plans](#Edit plans)</li> <li>[Delete plans](#Delete plans)</li> <li>[Execute plans](#Execute plans)</li></ul></li> <li><a href="#Usage(CommandLine)">Usage(CommandLine)</a></li></ul> <h1 id="introduction"><a href="#introduction" class="header-anchor">#</a> Introduction</h1> <p>IoTDB generates a variety of logs during runtime like other software systems. The debug and trace |
| logs can help the developers keep trace of the status of IoTDB and dig out potential or unclear bugs |
| The info logs may tell how healthy the system is and point out directions for database parameter |
| optimization. The warn and error logs indicate the system is in a dangerous status or |
| something unexpected happened (very likely a bug or an attack) and helps the database |
| administrator save the system before it crashes or find the reasons why it has crashed.</p> <p>With the logs being so valuable a source of monitoring system status, mining the logs for their |
| potential precious information has become quite a hot issue both in academy and industry. |
| Traditional ways often require much human-resource to discover the value behind the logs by |
| reading and analyzing the logs carefully. Usually, the logs of different sources (like Java |
| classes) are mixed together in several files and only the most experienced debugging experts know |
| from the beginning what logs exactly they long for, many less experienced programmers would spend |
| time reading unrelated logs and filtering them out. Nevertheless, logs are mostly composed with |
| strings containing numbers which describe the system status and they are much less straight-forward for |
| humans to understand and compare than plots and statistics.</p> <p>To reduce the difficulty of understanding what has happened behind these logs and better comparing |
| them, we present a simple tool LogVisualizer to retrieve interesting (specified by the user) |
| variables in the log files, generate timeseries based on these observations and draw plots to show |
| them in a more human-friendly way. LogVisualizer also collects the statistics of the logs to |
| present an overall view of what was going on.</p> <h1 id="preparation"><a href="#preparation" class="header-anchor">#</a> Preparation</h1> <p>Before using LogVisualizer, you should have it built. Since LogVisualizer is integrated in the |
| server module as a tool, you can build the server together with LogVisualizer using:</p> <blockquote><p>mvn clean package -pl server -DskipTests</p></blockquote> <p>Then you fan find the scripts to start LogVisualizer in: |
| <code>server/target/iotdb-server-{project-version}/tools/logVisualize</code></p> <p>To have access to the advanced usages of this tool, you must have some basic knowledge about regular |
| expressions, especially Java style ones. Knowing about regular expressions enables to create your own |
| visualization plans or modify the existing ones. However, if you are totally new to regular expressions, |
| you can still use the preset plans which are only applicable to IoTDB.</p> <h1 id="usage-gui"><a href="#usage-gui" class="header-anchor">#</a> Usage(GUI)</h1> <h2 id="run-the-gui"><a href="#run-the-gui" class="header-anchor">#</a> Run the gui</h2> <p>You can run LogVisualizer using <code>log-visualizer-gui.sh</code> (or <code>log-visualizer-gui.bat</code> in windows). |
| This will bring you a gui like:</p> <img src="https://github.com/jt2594838/PicHub/blob/master/log-visualizer/main_panel.png?raw=true" style="width:100%;max-width:800px;max-height:600px;margin-left:auto;margin-right:auto;display:block;"> <h2 id="choose-the-log-file-s"><a href="#choose-the-log-file-s" class="header-anchor">#</a> Choose the log file(s)</h2> <p>First, you should choose a file containing the logs (or a directory containing such files) to be |
| visualized. Notice that we currently only support single-line logs and logs with multiple lines |
| will be ignored.</p> <img src="https://github.com/jt2594838/PicHub/blob/master/log-visualizer/select_log_file.png?raw=true" style="width:100%;max-width:800px;max-height:600px;margin-left:auto;margin-right:auto;display:block;"> <h2 id="choose-a-parser-property-file"><a href="#choose-a-parser-property-file" class="header-anchor">#</a> Choose a parser property file</h2> <p>Second, you should also choose a file describing how to parse the log file. For log files |
| produced by IoTDB, we provide an example in |
| <code>server/src/assembly/resources/tools/logVisualize/default.log.pattern</code>. If your logs have |
| similar structure as the IoTDB ones, you may just use it, otherwise, you should read that file |
| carefully and modify it for your logs.</p> <img src="https://github.com/jt2594838/PicHub/blob/master/log-visualizer/select_log_parser_property.png?raw=true" style="width:100%;max-width:800px;max-height:600px;margin-left:auto;margin-right:auto;display:block;"> <h2 id="load-logs"><a href="#load-logs" class="header-anchor">#</a> Load logs</h2> <p>Then, click the <code>Load logs</code> button to let the LogVisualizer to prepare to read the logs. If the |
| preparation is successful, the label above will show <code>Logs are successfully loaded</code>, otherwise, a |
| dialog will show you what has gone wrong and you should fix it accordingly.</p> <img src="https://github.com/jt2594838/PicHub/blob/master/log-visualizer/load_logs.png?raw=true" style="width:100%;max-width:800px;max-height:600px;margin-left:auto;margin-right:auto;display:block;"> <h2 id="load-plans"><a href="#load-plans" class="header-anchor">#</a> Load plans</h2> <p>Next, you can load existing visualization plans or create new ones. For loading existing plans, |
| just click the button <code>Load plans</code> and choose the log files or directories that contain log |
| files. Notice that if choose a directory, then the directory must only contain visualization plans.</p> <img src="https://github.com/jt2594838/PicHub/blob/master/log-visualizer/load_plan.png?raw=true" style="width:100%;max-width:800px;max-height:600px;margin-left:auto;margin-right:auto;display:block;"> <h2 id="create-new-plans"><a href="#create-new-plans" class="header-anchor">#</a> Create new plans</h2> <p>Now, we will present an example of how to create a new plan. First, click the <code>Create plan</code> |
| button and choose a place to save the new plan, then the plan will show up in the list in the |
| left. The name of the file will be used as the plan's name and it must be different from |
| any existing plans.</p> <img src="https://github.com/jt2594838/PicHub/blob/master/log-visualizer/create_plan.png?raw=true" style="width:100%;max-width:800px;max-height:600px;margin-left:auto;margin-right:auto;display:block;"> <h2 id="edit-plans"><a href="#edit-plans" class="header-anchor">#</a> Edit plans</h2> <p>After creating the new plan, you can edit it in the right panel. We provide an example in |
| <code>server/src/assembly/resources/tools/logVisualize/plans/flushTimeConsumption.plan.example</code>, |
| we strongly recommend you read it carefully to know how to fill the fields. You can also edit plans |
| you have loaded here. Do not forget to click the <code>Save plan</code> button if you want to save what you |
| have modified. If you want to create a plan that shows the time consumptions of jobs grouped by |
| their type, you may set the fields like the following one.</p> <img src="https://github.com/jt2594838/PicHub/blob/master/log-visualizer/edit_plan.png?raw=true" style="width:100%;max-width:800px;max-height:600px;margin-left:auto;margin-right:auto;display:block;"> <h2 id="delete-plans"><a href="#delete-plans" class="header-anchor">#</a> Delete plans</h2> <p>If you don't need a plan anymore, you can select it and click <code>Delete plan</code> button. This will |
| remove the plan from the disk.</p> <h2 id="execute-plans"><a href="#execute-plans" class="header-anchor">#</a> Execute plans</h2> <p>Finally, you can execute a plan by selecting it and click <code>Execute plan</code>. Please make sure you |
| have loaded the logs. Afterwards, two tabs will be added into the main panel. The first contains |
| timeseries charts each corresponding to log groups and plotting the measurements specified by the |
| plan. The second one presents the statistics of each measurement of each log group. Once you have |
| done browsing, you can click the button on the up-right to close the tab.</p> <img src="https://github.com/jt2594838/PicHub/blob/master/log-visualizer/execute_plan.png?raw=true" style="width:100%;max-width:800px;max-height:600px;margin-left:auto;margin-right:auto;display:block;"> <img src="https://github.com/jt2594838/PicHub/blob/master/log-visualizer/plot.png?raw=true" style="width:100%;max-width:800px;max-height:600px;margin-left:auto;margin-right:auto;display:block;"> <img src="https://github.com/jt2594838/PicHub/blob/master/log-visualizer/statistics.png?raw=true" style="width:100%;max-width:800px;max-height:600px;margin-left:auto;margin-right:auto;display:block;"> <h1 id="usage-commandline"><a href="#usage-commandline" class="header-anchor">#</a> Usage(CommandLine)</h1> <p>We also provide a command line tool of LogVisualizer, which is <code>log-visualizer-cmd.sh</code> |
| (or <code>log-visualizer-cmd.bat</code>). This tool takes exactly 4 parameters, which are: <code>the path of the log file</code> <code>the path of the parser property file</code> <code>the path of the visualization plan(s)</code> <code>the output directory</code>. |
| Running this tool will load the given logs, run all the plans and save the result of each plan into |
| a sub-directory of the output path. |
| E.g.:</p> <blockquote><p>./log-visualizer-cmd.sh all.log default.log.pattern planB.plan results</p></blockquote></div> <!----> <p style="text-align: center;">Copyright © 2021 The Apache Software Foundation.<br> |
| Apache and the Apache feather logo are trademarks of The Apache Software Foundation</p> <p style="text-align: center; margin-top: 10px; color: #444"> |
| Contact us: Join QQ Group 659990460 | Add friend <i>tietouqiao</i> and be invited to Wechat Group<br> |
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