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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"><span>IoTDB User Guide (V0.8.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 Key Concepts and Terminology</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>3-Operation Manual</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>4-Deployment and Management</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>5-IoTDB SQL Documentation</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>6-JDBC API</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>7-TsFile</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading open"><span>8-System Tools</span> <span class="arrow down"></span></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/UserGuide/V0.8.x/8-System Tools/1-Sync.html" class="sidebar-link">Sync</a></li><li><a href="/UserGuide/V0.8.x/8-System Tools/2-Memory Estimation Tool.html" class="active sidebar-link">Memory Estimation Tool</a></li></ul></section></li></ul> </aside> <main class="page"> <div class="content content__default"><h1 id="memory-estimation-tool"><a href="#memory-estimation-tool" class="header-anchor">#</a> Memory Estimation Tool</h1> <h1 id="introduction"><a href="#introduction" class="header-anchor">#</a> Introduction</h1> <p>This tool calculates the minimum memory for writing to meet specific workload through a number of parameters input by users. (Memory in IoTDB is divided into three parts: write memory, read memory and reserve memory. Write memory is used for data write allocation. The ratio of the three can be set in the configuration file) The unit of result is in GB.</p> <h1 id="input-parameters"><a href="#input-parameters" class="header-anchor">#</a> Input parameters</h1> <p>When using this tool, the parameters needed to be input are as follows: |
| <table><tr><td>Parameter</td> <td>Parameter Description</td> <td>Example</td> <td>Necessary</td></tr> <tr><td>-sg | --storagegroup <storage group number></td> <td>storage group number</td> <td>-sg 20</td> <td>true</td></tr> <tr><td>-ts | --timeseries <total timeseries number></td> <td>total timeseries number</td> <td>-ts 10000</td> <td>true</td></tr> <tr><td>-mts | --maxtimeseries <max timeseries></td> <td>maximum number of timeseries among storage groups.If the time series are evenly distributed in the storage group, this parameter may not be set.</td> <td>-mts 10000</td> <td>false</td></tr></table></p> <p>In memory estimation, if the calculation takes a long time, the tool will show the running progress below, which is convenient for users to master the progress.</p> <h1 id="usage"><a href="#usage" class="header-anchor">#</a> Usage</h1> <p>Users can use the tool using scripts under the ``IOTDB_HOME/bin`folder. |
| For Linux and Mac OS X users:</p> <ul><li>Assume that there are 20 storage groups, 10w timeseries and timeseries are evenly distributed in the storage groups:</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code> Shell >$IOTDB_HOME/bin/memory-tool.sh calmem -sg 20 -ts 100000 |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><ul><li>Assume that there are 20 storage groups, 10w timeseries and maximum timeseries number among storage groups is 50000:</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code> Shell >$IOTDB_HOME/bin/memory-tool.sh calmem -sg 20 -ts 100000 -tsm -50000 |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>For Windows users:</p> <ul><li>Assume that there are 20 storage groups, 10w timeseries and timeseries are evenly distributed in the storage groups:</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code> Shell >$IOTDB_HOME\bin\memory-tool.bat calmem -sg 20 -ts 100000 |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><ul><li>Assume that there are 20 storage groups, 10w timeseries and maximum timeseries number among storage groups is 50000:</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code> Shell >$IOTDB_HOME\bin\memory-tool.bat calmem -sg 20 -ts 100000 -tsm -50000 |
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