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<!----></section></li></ul> </aside> <main class="page"> <div class="content content__default"><h1 id="同步工具"><a href="#同步工具" class="header-anchor">#</a> 同步工具</h1> <ul><li><a href="#%E7%AC%AC8%E7%AB%A0-%E7%B3%BB%E7%BB%9F%E5%B7%A5%E5%85%B7">第6章: 系统工具</a></li> <li><a href="#%E5%90%8C%E6%AD%A5%E5%B7%A5%E5%85%B7">同步工具</a></li> <li><a href="#%E4%BB%8B%E7%BB%8D">介绍</a></li> <li><a href="#%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF">应用场景</a></li> <li><a href="#%E9%85%8D%E7%BD%AE%E5%8F%82%E6%95%B0">配置参数</a> <ul><li><a href="#%E5%90%8C%E6%AD%A5%E5%B7%A5%E5%85%B7%E6%8E%A5%E6%94%B6%E7%AB%AF">同步工具接收端</a></li> <li><a href="#%E5%90%8C%E6%AD%A5%E5%B7%A5%E5%85%B7%E5%8F%91%E9%80%81%E7%AB%AF">同步工具发送端</a></li></ul></li> <li><a href="#%E4%BD%BF%E7%94%A8%E6%96%B9%E5%BC%8F">使用方式</a> <ul><li><a href="#%E5%90%AF%E5%8A%A8%E5%90%8C%E6%AD%A5%E5%8A%9F%E8%83%BD%E6%8E%A5%E6%94%B6%E7%AB%AF">启动同步功能接收端</a></li> <li><a href="#%E5%85%B3%E9%97%AD%E5%90%8C%E6%AD%A5%E5%8A%9F%E8%83%BD%E6%8E%A5%E6%94%B6%E7%AB%AF">关闭同步功能接收端</a></li> <li><a href="#%E5%90%AF%E5%8A%A8%E5%90%8C%E6%AD%A5%E5%8A%9F%E8%83%BD%E5%8F%91%E9%80%81%E7%AB%AF">启动同步功能发送端</a></li> <li><a href="#%E5%85%B3%E9%97%AD%E5%90%8C%E6%AD%A5%E5%8A%9F%E8%83%BD%E5%8F%91%E9%80%81%E7%AB%AF">关闭同步功能发送端</a></li></ul></li></ul> <h1 id="介绍"><a href="#介绍" class="header-anchor">#</a> 介绍</h1> <p>同步工具是定期将本地磁盘中和新增的已持久化的tsfile文件上传至云端并加载到IoTDB的套件工具。</p> <p>在同步工具的发送端，同步模块是一个独立的进程，独立于本地的IoTDB。通过独立的脚本进行启动和关闭(详见章节<code>使用方式</code>)，同步的频率周期可由用户设置。</p> <p>在同步工具的的接收端，同步模块内嵌于IoTDB的引擎，和IoTDB处于同一个进程中。同步模块监听一个独立的端口，该端口可由用户设置(详见章节<code>配置参数</code>)。用户使用前，需要在同步接收端设置同步白名单，以网段形式表示，接收端的同步模块只接受位于白名单网段中的发送端同步的数据.</p> <p>同步工具具有多对一的发送-接受模式，即一个同步接收端可以同时接受多个同步发送端传输的数据，一个同步发送端只能向一个同步接收端发送数据</p> <blockquote><p>注意：在使用同步工具前，同步工具的接收端和发送端需要单独配置。</p></blockquote> <h1 id="应用场景"><a href="#应用场景" class="header-anchor">#</a> 应用场景</h1> <p>以一个工厂应用为例，通常有多个分厂和多个总厂，每个分厂中使用一个IoTDB实例收集数据，然后将数据定时汇总到总厂中进行备份或者分析等，一个总厂可以接收来自多个分厂的数据，一个分厂也可以给多个总厂同步数据，在这种场景下每个IoTDB实例所管理的设备各不相同。</p> <p>在sync模块中，每个分厂是发送端，总厂是接收端，发送端定时将数据同步给接收端，在上述应用场景下一个设备的数据只能由一个发送端来收集，因此多个发送端同步的数据之间必须是没有设备重叠的，否则不符合sync功能的应用场景。</p> <p>当出现异常场景时，即两个或两个以上的发送端向同一个接收端同步相同设备(其存储组设为root.sg)的数据时，后被接收端收到的含有该设备数据的发送端的root.sg数据将会被拒绝接收。示例：发动端1向接收端同步存储组root.sg1和root.sg2, 发动端2向接收端同步存储组root.sg2和root.sg3, |
| 均包括时间序列root.sg2.d0.s0, 若接收端先接收到发送端1的root.sg2.d0.s0的数据，那么接收端将拒绝发送端2的root.sg2同步的数据。</p> <h1 id="配置参数"><a href="#配置参数" class="header-anchor">#</a> 配置参数</h1> <h2 id="同步工具接收端"><a href="#同步工具接收端" class="header-anchor">#</a> 同步工具接收端</h2> <p>同步工具接收端的参数配置位于IoTDB的配置文件iotdb-engine.properties中，其安装目录为$IOTDB_HOME/conf/iotdb-engine.properties。在该配置文件中，有四个参数和同步接收端有关，配置说明如下:</p> <table><tr><td colspan="2">参数名: is_sync_enable</td></tr> <tr><td width="20%">描述</td> <td>同步功能开关，配置为true表示接收端允许接收同步的数据并加载，设置为false的时候表示接收端不允许接收同步的数据</td></tr> <tr><td>类型</td> <td>Boolean</td></tr> <tr><td>默认值</td> <td>false</td></tr> <tr><td>改后生效方式</td> <td>重启服务器生效</td></tr></table> <table><tr><td colspan="2">参数名: IP_white_list</td></tr> <tr><td width="20%">描述</td> <td>设置同步功能发送端IP地址的白名单，以网段的形式表示，多个网段之间用逗号分隔。发送端向接收端同步数据时，只有当该发送端IP地址处于该白名单设置的网段范围内，接收端才允许同步操作。如果白名单为空，则接收端不允许任何发送端同步数据。默认接收端接受全部IP的同步请求。</td></tr> <tr><td>类型</td> <td>String</td></tr> <tr><td>默认值</td> <td>0.0.0.0/0</td></tr> <tr><td>改后生效方式</td> <td>重启服务器生效</td></tr></table> <table><tr><td colspan="2">参数名: sync_server_port</td></tr> <tr><td width="20%">描述</td> <td>同步接收端服务器监听接口，请确认该端口不是系统保留端口并且未被占用。参数is_sync_enable设置为true时有效，参数is_sync_enable设置为false时无效</td></tr> <tr><td>类型</td> <td>Short Int : [0,65535]</td></tr> <tr><td>默认值</td> <td>5555</td></tr> <tr><td>改后生效方式</td> <td>重启服务器生效</td></tr></table> <h2 id="同步工具发送端"><a href="#同步工具发送端" class="header-anchor">#</a> 同步工具发送端</h2> <p>同步功能发送端的参数配置在一个单独的配置文件中，其安装目录为<code>$IOTDB_HOME/conf/iotdb-sync-client.properties</code>。在该配置文件中，有五个参数和同步发送端有关，配置说明如下： |
| <table><tr><td colspan="2">参数名: server_ip</td></tr> <tr><td width="20%">描述</td> <td>同步接收端的IP地址</td></tr> <tr><td>类型</td> <td>String</td></tr> <tr><td>默认值</td> <td>127.0.0.1</td></tr> <tr><td>改后生效方式</td> <td>重启同步功能发送端生效</td></tr></table></p> <table><tr><td colspan="2">参数名: server_port</td></tr> <tr><td width="20%">描述</td> <td>同步接收端服务器监听端口，需要保证该端口和同步接收端配置的监听端口一致</td></tr> <tr><td>类型</td> <td>Short Int : [0,65535]</td></tr> <tr><td>默认值</td> <td>5555</td></tr> <tr><td>改后生效方式</td> <td>重启同步功能发送端生效</td></tr></table> <table><tr><td colspan="2">参数名: sync_period_in_second</td></tr> <tr><td width="20%">描述</td> <td>同步周期，两次同步任务开始时间的间隔，单位为秒(s)</td></tr> <tr><td>类型</td> <td>Int : [0,2147483647]</td></tr> <tr><td>默认值</td> <td>600</td></tr> <tr><td>改后生效方式</td> <td>重启同步功能发送端生效</td></tr></table> <table><tr><td colspan="2">参数名: sync_storage_groups</td></tr> <tr><td width="20%">描述</td> <td>进行同步的存储组列表，存储组间用逗号分隔；若列表设置为空表示同步所有存储组，默认为空</td></tr> <tr><td>类型</td> <td>String</td></tr> <tr><td>示例</td> <td>root.sg1, root.sg2</td></tr> <tr><td>改后生效方式</td> <td>重启同步功能发送端生效</td></tr></table> <table><tr><td colspan="2">参数名: max_number_of_sync_file_retry</td></tr> <tr><td width="20%">描述</td> <td>发送端同步文件到接收端失败时的最大重试次数</td></tr> <tr><td>类型</td> <td>Int : [0,2147483647]</td></tr> <tr><td>示例</td> <td>5</td></tr> <tr><td>改后生效方式</td> <td>重启同步功能发送端生效</td></tr></table> <h1 id="使用方式"><a href="#使用方式" class="header-anchor">#</a> 使用方式</h1> <h2 id="启动同步功能接收端"><a href="#启动同步功能接收端" class="header-anchor">#</a> 启动同步功能接收端</h2> <ol><li>配置接收端的参数，例如： |
| <img src="https://user-images.githubusercontent.com/26211279/64172919-a32cb100-ce88-11e9-821c-33369bff6d34.png" style="width:100%;max-width:800px;max-height:600px;margin-left:auto;margin-right:auto;display:block;"></li> <li>启动IoTDB引擎，同步功能接收端会同时启动，启动时LOG日志会出现<code>IoTDB: start SYNC ServerService successfully</code>字样，表示同步接收端启动成功，如图所示： |
| <img src="https://user-images.githubusercontent.com/26211279/59494513-df6ef780-8ebf-11e9-83e1-ee8ae64b76d0.png" style="width:100%;max-width:800px;max-height:600px;margin-left:auto;margin-right:auto;display:block;"></li></ol> <h2 id="关闭同步功能接收端"><a href="#关闭同步功能接收端" class="header-anchor">#</a> 关闭同步功能接收端</h2> <p>关闭IoTDB，同步功能接收端会同时关闭。</p> <h2 id="启动同步功能发送端"><a href="#启动同步功能发送端" class="header-anchor">#</a> 启动同步功能发送端</h2> <ol><li>配置发送端的参数， 如图所示: |
| <img src="https://user-images.githubusercontent.com/26211279/64172668-15e95c80-ce88-11e9-9700-dff7daf06bb7.png" style="width:100%;max-width:800px;max-height:600px;margin-left:auto;margin-right:auto;display:block;"></li> <li>启动同步功能发送端</li></ol> <p>用户可以使用<code>$IOTDB_HOME/bin</code>文件夹下的脚本启动同步功能的发送端 |
| Linux系统与MacOS系统启动命令如下：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code> Shell >$IOTDB_HOME/bin/start-sync-client.sh |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>Windows系统启动命令如下：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code> Shell >$IOTDB_HOME\bin\start-sync-client.bat |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><img src="https://user-images.githubusercontent.com/26211279/59494951-dc283b80-8ec0-11e9-9575-5d8578c08ceb.png" style="width:100%;max-width:800px;max-height:600px;margin-left:auto;margin-right:auto;display:block;"> <h2 id="关闭同步功能发送端"><a href="#关闭同步功能发送端" class="header-anchor">#</a> 关闭同步功能发送端</h2> <p>用户可以使用<code>$IOTDB_HOME/bin</code>文件夹下的脚本关闭同步功能的发送端。 |
| Linux系统与MacOS系统停止命令如下：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code> Shell >$IOTDB_HOME/bin/stop-sync-client.sh |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>Windows系统停止命令如下：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code> Shell >$IOTDB_HOME\bin\stop-sync-client.bat |
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