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| <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" 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></a></nav> <ul class="sidebar-links"><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>IoTDB用户手册 (V0.9.x)</span> <!----></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>0-开始</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>1-概览</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>2-概念</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>3-服务器端</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>4-客户端</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>5-操作指南</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>6-系统工具</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>7-生态集成</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading open"><span>8-系统设计</span> <span class="arrow down"></span></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/zh/UserGuide/V0.9.x/8-System Design/1-Hierarchy.html" class="active sidebar-link">层次结构</a></li><li><a href="/zh/UserGuide/V0.9.x/8-System Design/2-Files.html" class="sidebar-link">文件</a></li><li><a href="/zh/UserGuide/V0.9.x/8-System Design/3-Writing Data on HDFS.html" class="sidebar-link">使用HDFS存储数据</a></li><li><a href="/zh/UserGuide/V0.9.x/8-System Design/4-Shared Nothing Cluster.html" class="sidebar-link">Shared-nothing 架构</a></li></ul></section></li></ul> </aside> <main class="page"> <div class="content content__default"><h1 id="层次结构"><a href="#层次结构" class="header-anchor">#</a> 层次结构</h1> <h2 id="_1-tsfile设计"><a href="#_1-tsfile设计" class="header-anchor">#</a> 1. TsFile设计</h2> <p>这是对TsFile设计细节的介绍。</p> <h3 id="_1-1-可变存储"><a href="#_1-1-可变存储" class="header-anchor">#</a> 1.1 可变存储</h3> <ul><li><strong>大端</strong> |
| |
| <ul><li>例如, <code>int</code> <code>0x8</code>将被存储为<code>00 00 00 08</code>，而不是<code>08 00 00 00</code>。</li></ul></li> <li><strong>可变长度的字符串</strong> <ul><li>格式为<code>int size</code>加<code>Sring literal</code>。 大小可以为零。</li> <li>大小等于此字符串将占用的字节数，并且可能不等于该字符串的长度。</li> <li>例如，“ sensor_1”将被存储为<code>00 00 00 08</code>加上“ sensor_1”的编码（ASCII）。</li> <li>请注意，对于“魔术字符串”（文件签名）“ TsFilev0.8.0”，大小（12）和编码（ASCII）是固定的，因此无需在该字符串文字前放置大小。</li></ul></li> <li><strong>数据类型硬编码</strong> <ul><li>0: BOOLEAN</li> <li>1: INT32 (<code>int</code>)</li> <li>2: INT64 (<code>long</code>)</li> <li>3: FLOAT</li> <li>4: DOUBLE</li> <li>5: TEXT (<code>String</code>)</li></ul></li> <li><strong>编码类型硬编码</strong> <ul><li>0: PLAIN</li> <li>1: PLAIN_DICTIONARY</li> <li>2: RLE</li> <li>3: DIFF</li> <li>4: TS_2DIFF</li> <li>5: BITMAP</li> <li>6: GORILLA</li> <li>7: REGULAR</li></ul></li> <li><strong>压缩类型硬编码</strong> <ul><li>0: UNCOMPRESSED</li> <li>1: SNAPPY</li> <li>2: GZIP</li> <li>3: LZO</li> <li>4: SDT</li> <li>5: PAA</li> <li>6: PLA</li></ul></li> <li><strong>TsDigest统计类型硬编码</strong> <ul><li>0: min_value</li> <li>1: max_value</li> <li>2: first_value</li> <li>3: last_value</li> <li>4: sum_value</li></ul></li></ul> <h3 id="_1-2-tsfile概述"><a href="#_1-2-tsfile概述" class="header-anchor">#</a> 1.2 TsFile概述</h3> <p>这是有关TsFile结构的图。</p> <p><img src="https://user-images.githubusercontent.com/40447846/61616997-6fad1300-ac9c-11e9-9c17-46785ebfbc88.png" alt="TsFile Breakdown"></p> <h4 id="_1-2-1-魔术字符串和版本号"><a href="#_1-2-1-魔术字符串和版本号" class="header-anchor">#</a> 1.2.1 魔术字符串和版本号</h4> <p>TsFile以6字节的魔术字符串（<code>TsFile</code>）和6字节的版本号（<code>000001</code>）开头。</p> <h4 id="_1-2-2-数据"><a href="#_1-2-2-数据" class="header-anchor">#</a> 1.2.2 数据</h4> <p>TsFile文件的内容可以分为两部分：数据和元数据。 数据和元数据之间有一个字节<code>0x02</code>作为标记。</p> <p>数据部分是一个<code>ChunkGroup</code>数组，每个ChunkGroup代表一个* device *。</p> <h5 id="块组"><a href="#块组" class="header-anchor">#</a> 块组</h5> <p><code>ChunkGroup</code>具有一个<code>Chunk</code>数组，一个后续字节<code>0x00</code>作为标记以及一个<code>ChunkFooter</code>。</p> <h5 id="块"><a href="#块" class="header-anchor">#</a> 块</h5> <p><code>块</code>代表<em>传感器</em>。 在<code>ChunkHeader</code>和<code>Page</code>数组之后，有一个字节<code>0x01</code>作为标记。</p> <h5 id="块头"><a href="#块头" class="header-anchor">#</a> 块头</h5> <table><thead><tr><th style="text-align:center;">Member Description</th> <th style="text-align:center;">Member Type</th></tr></thead> <tbody><tr><td style="text-align:center;">该传感器的名称（measurementID）</td> <td style="text-align:center;">String</td></tr> <tr><td style="text-align:center;">这个块的大小</td> <td style="text-align:center;">int</td></tr> <tr><td style="text-align:center;">该卡盘的数据类型</td> <td style="text-align:center;">short</td></tr> <tr><td style="text-align:center;">页数</td> <td style="text-align:center;">int</td></tr> <tr><td style="text-align:center;">压缩类型</td> <td style="text-align:center;">short</td></tr> <tr><td style="text-align:center;">编码方式</td> <td style="text-align:center;">short</td></tr> <tr><td style="text-align:center;">最大墓碑时间</td> <td style="text-align:center;">long</td></tr></tbody></table> <h5 id="页"><a href="#页" class="header-anchor">#</a> 页</h5> <p>页面代表块中的一些数据。 它包含一个PageHeader和实际数据（编码的时间值对）。</p> <p>PageHeader结构</p> <table><thead><tr><th style="text-align:center;">Member Description</th> <th style="text-align:center;">Member Type</th></tr></thead> <tbody><tr><td style="text-align:center;">压缩前的数据大小</td> <td style="text-align:center;">int</td></tr> <tr><td style="text-align:center;">压缩后的数据大小（如果使用SNAPPY）</td> <td style="text-align:center;">int</td></tr> <tr><td style="text-align:center;">值数</td> <td style="text-align:center;">int</td></tr> <tr><td style="text-align:center;">最大时间戳</td> <td style="text-align:center;">long</td></tr> <tr><td style="text-align:center;">最小时间戳</td> <td style="text-align:center;">long</td></tr> <tr><td style="text-align:center;">页面最大值</td> <td style="text-align:center;">Type of the page</td></tr> <tr><td style="text-align:center;">页面最小值</td> <td style="text-align:center;">Type of the page</td></tr> <tr><td style="text-align:center;">页面的第一个值</td> <td style="text-align:center;">Type of the page</td></tr> <tr><td style="text-align:center;">页面总和</td> <td style="text-align:center;">double</td></tr> <tr><td style="text-align:center;">页面的最后一个值</td> <td style="text-align:center;">Type of the page</td></tr></tbody></table> <h5 id="chunkgroupfooter"><a href="#chunkgroupfooter" class="header-anchor">#</a> ChunkGroupFooter</h5> <table><thead><tr><th style="text-align:center;">Member Description</th> <th style="text-align:center;">Member Type</th></tr></thead> <tbody><tr><td style="text-align:center;">设备id</td> <td style="text-align:center;">String</td></tr> <tr><td style="text-align:center;">ChunkGroup的数据大小</td> <td style="text-align:center;">long</td></tr> <tr><td style="text-align:center;">块数</td> <td style="text-align:center;">int</td></tr></tbody></table> <h4 id="_1-2-3-元数据"><a href="#_1-2-3-元数据" class="header-anchor">#</a> 1.2.3 元数据</h4> <h5 id="_1-2-3-1-tsdevicemetadata"><a href="#_1-2-3-1-tsdevicemetadata" class="header-anchor">#</a> 1.2.3.1 TsDeviceMetaData</h5> <p>元数据的第一部分是<code>TsDeviceMetaData</code></p> <table><thead><tr><th style="text-align:center;">Member Description</th> <th style="text-align:center;">Member Type</th></tr></thead> <tbody><tr><td style="text-align:center;">开始时间</td> <td style="text-align:center;">long</td></tr> <tr><td style="text-align:center;">时间结束</td> <td style="text-align:center;">long</td></tr> <tr><td style="text-align:center;">组块数</td> <td style="text-align:center;">int</td></tr> <tr><td style="text-align:center;">ChunkGroup元数据列表</td> <td style="text-align:center;">list</td></tr></tbody></table> <h6 id="chunkgroupmetadata"><a href="#chunkgroupmetadata" class="header-anchor">#</a> ChunkGroupMetaData</h6> <table><thead><tr><th style="text-align:center;">Member Description</th> <th style="text-align:center;">Member Type</th></tr></thead> <tbody><tr><td style="text-align:center;">设备编号</td> <td style="text-align:center;">String</td></tr> <tr><td style="text-align:center;">ChunkGroup的起始偏移量</td> <td style="text-align:center;">long</td></tr> <tr><td style="text-align:center;">块组的结束偏移</td> <td style="text-align:center;">long</td></tr> <tr><td style="text-align:center;">版</td> <td style="text-align:center;">long</td></tr> <tr><td style="text-align:center;">ChunkMetaData的数量</td> <td style="text-align:center;">int</td></tr> <tr><td style="text-align:center;">ChunkMetaData列表</td> <td style="text-align:center;">list</td></tr></tbody></table> <h6 id="chunkmetadata"><a href="#chunkmetadata" class="header-anchor">#</a> ChunkMetaData</h6> <table><thead><tr><th style="text-align:center;">Member Description</th> <th style="text-align:center;">Member Type</th></tr></thead> <tbody><tr><td style="text-align:center;">MeasurementId</td> <td style="text-align:center;">String</td></tr> <tr><td style="text-align:center;">ChunkHeader的起始偏移量</td> <td style="text-align:center;">long</td></tr> <tr><td style="text-align:center;">数据点数</td> <td style="text-align:center;">long</td></tr> <tr><td style="text-align:center;">开始时间</td> <td style="text-align:center;">long</td></tr> <tr><td style="text-align:center;">时间结束</td> <td style="text-align:center;">long</td></tr> <tr><td style="text-align:center;">数据类型</td> <td style="text-align:center;">short</td></tr> <tr><td style="text-align:center;">该块的统计信息</td> <td style="text-align:center;">TsDigest</td></tr></tbody></table> <h6 id="tsdigest"><a href="#tsdigest" class="header-anchor">#</a> TsDigest</h6> <p>现在有五个统计信息： <code>min_value, max_value, first_value, last_value, sum_value</code>.</p> <p>在v0.8.x中，统计信息的存储格式为<code>名称/值</code>对。 也就是说，<code>Map <String，ByteBuffer>statistics</code>。 名称是一个字符串（记住长度在文字之前）。 但是对于该值，还有一个整数byteLength用作后续值的自我描述长度，因为该值可能是各种类型。 例如，如果<code>min_value</code>是整数0，则它将作为[9“ min_value” 4 0]存储在TsFile中。</p> <p>下图显示了<code>TsDigest.deserializeFrom（buffer）</code>的示例。 在v0.8.0中，我们将获得</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>Map<String, ByteBuffer> statistics = { |
| "min_value" -> ByteBuffer of int value 0, |
| "last" -> ByteBuffer of int value 19, |
| "sum" -> ByteBuffer of double value 1093347116, |
| "first" -> ByteBuffer of int value 0, |
| "max_value" -> ByteBuffer of int value 99 |
| } |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br></div></div><img src="https://user-images.githubusercontent.com/33376433/63765352-664a4280-c8fb-11e9-869e-859edf6d00bb.png" style="width:100%;max-width:800px;max-height:600px;margin-left:auto;margin-right:auto;display:block;"> <p>在v0.9.x中，为了节省空间和时间，将存储格式更改为数组。 即，ByteBuffer []统计信息。 遵循<code>StatisticType</code>中定义的顺序，数组的每个位置与特定类型的统计信息都有固定的关联：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>enum StatisticType { |
| min_value, max_value, first_value, last_value, sum_value |
| } |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><p>因此，在上面的示例中，我们将获得</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>ByteBuffer[] statistics = [ |
| ByteBuffer of int value 0, // associated with "min_value" |
| ByteBuffer of int value 99, // associated with "max_value" |
| ByteBuffer of int value 0, // associated with "first_value" |
| ByteBuffer of int value 19, // associated with "last_value" |
| ByteBuffer of double value 1093347116 // associated with "sum_value" |
| ] |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br></div></div><p>作为v0.9.x中的另一个示例，当从缓冲区[3，0,4,0，1,4,99，3,4,19]反序列化TsDigest时，我们得到</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>ByteBuffer[] statistics = [ |
| ByteBuffer of int value 0, // associated with "min_value" |
| ByteBuffer of int value 99, // associated with "max_value" |
| null, // associated with "first_value" |
| ByteBuffer of int value 19, // associated with "last_value" |
| null // associated with "sum_value" |
| ] |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br></div></div><h5 id="_1-2-3-2-tsfilemetadata"><a href="#_1-2-3-2-tsfilemetadata" class="header-anchor">#</a> 1.2.3.2 TsFileMetaData</h5> <p>在<code>TsDeviceMetadatas</code>之后是<code>TsFileMetaData</code>。</p> <table><thead><tr><th style="text-align:center;">Member Description</th> <th style="text-align:center;">Member Type</th></tr></thead> <tbody><tr><td style="text-align:center;">Number of devices</td> <td style="text-align:center;">int</td></tr> <tr><td style="text-align:center;">Pairs of device name and deviceMetadataIndex</td> <td style="text-align:center;">String, TsDeviceMetadataIndex pair</td></tr> <tr><td style="text-align:center;">Number of measurements</td> <td style="text-align:center;">int</td></tr> <tr><td style="text-align:center;">Pairs of measurement name and schema</td> <td style="text-align:center;">String, MeasurementSchema pair</td></tr> <tr><td style="text-align:center;">Author byte</td> <td style="text-align:center;">byte</td></tr> <tr><td style="text-align:center;">Author(if author byte is 0x01)</td> <td style="text-align:center;">String</td></tr> <tr><td style="text-align:center;">totalChunkNum</td> <td style="text-align:center;">int</td></tr> <tr><td style="text-align:center;">invalidChunkNum</td> <td style="text-align:center;">int</td></tr> <tr><td style="text-align:center;">Bloom filter size</td> <td style="text-align:center;">int</td></tr> <tr><td style="text-align:center;">Bloom filter bit vector</td> <td style="text-align:center;">byte[Bloom filter size]</td></tr> <tr><td style="text-align:center;">Bloom filter capacity</td> <td style="text-align:center;">int</td></tr> <tr><td style="text-align:center;">Bloom filter hash functions size</td> <td style="text-align:center;">int</td></tr></tbody></table> <h6 id="tsdevicemetadataindex"><a href="#tsdevicemetadataindex" class="header-anchor">#</a> TsDeviceMetadataIndex</h6> <table><thead><tr><th style="text-align:center;">Member Description</th> <th style="text-align:center;">Member Type</th></tr></thead> <tbody><tr><td style="text-align:center;">DeviceId</td> <td style="text-align:center;">String</td></tr> <tr><td style="text-align:center;">Start offset of TsDeviceMetaData</td> <td style="text-align:center;">long</td></tr> <tr><td style="text-align:center;">length</td> <td style="text-align:center;">int</td></tr> <tr><td style="text-align:center;">Start time</td> <td style="text-align:center;">long</td></tr> <tr><td style="text-align:center;">End time</td> <td style="text-align:center;">long</td></tr></tbody></table> <h6 id="measurementschema"><a href="#measurementschema" class="header-anchor">#</a> MeasurementSchema</h6> <table><thead><tr><th style="text-align:center;">Member Description</th> <th style="text-align:center;">Member Type</th></tr></thead> <tbody><tr><td style="text-align:center;">MeasurementId</td> <td style="text-align:center;">String</td></tr> <tr><td style="text-align:center;">Data type</td> <td style="text-align:center;">short</td></tr> <tr><td style="text-align:center;">Encoding</td> <td style="text-align:center;">short</td></tr> <tr><td style="text-align:center;">Compressor</td> <td style="text-align:center;">short</td></tr> <tr><td style="text-align:center;">Size of props</td> <td style="text-align:center;">int</td></tr></tbody></table> <p>如果道具的大小大于0，则存在一个<String，String>对数组，作为此度量的属性。 |
| 例如“ max_point_number”“ 2”。</p> <h5 id="_1-2-3-3-tsfilemetadatasize"><a href="#_1-2-3-3-tsfilemetadatasize" class="header-anchor">#</a> 1.2.3.3 TsFileMetadataSize</h5> <p>在<code>TsFileMetaData</code>之后，有一个整数，指示<code>TsFileMetaData</code>的大小。</p> <h4 id="_1-2-4-魔术字符串"><a href="#_1-2-4-魔术字符串" class="header-anchor">#</a> 1.2.4 魔术字符串</h4> <p>Ts文件以6字节的魔术字符串结尾（至文件）。 恭喜你！ 您已经完成了发现TsFile的旅程。</p> <h3 id="_1-3-tool-set"><a href="#_1-3-tool-set" class="header-anchor">#</a> 1.3 Tool Set</h3> <h4 id="_1-3-1-tsfileresource打印工具"><a href="#_1-3-1-tsfileresource打印工具" class="header-anchor">#</a> 1.3.1 TsFileResource打印工具</h4> <p>构建服务器后，此工具的启动脚本将出现在<code>server \ target \ iotdb-server-0.9.2 \ tools</code>目录下。</p> <p>命令:</p> <p>对于Windows：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>.\print-tsfile-sketch.bat <path of your TsFileResource Directory> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>对于Linux或Mac OS：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>./print-tsfile-sketch.sh <path of your TsFileResource Directory> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>Windows上的示例：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>D:\incubator-iotdb\server\target\iotdb-server-0.9.2\tools>.\print-tsfile-resource-files.bat D:\data\data\sequence\root.vehicle |
| ```````````````````````` |
| Starting Printing the TsFileResources |
| ```````````````````````` |
| 12:31:59.861 [main] WARN org.apache.iotdb.db.conf.IoTDBDescriptor - Cannot find IOTDB_HOME or IOTDB_CONF environment variable when loading config file iotdb-engine.properties, use default configuration |
| analyzing D:\data\data\sequence\root.vehicle\1572496142067-101-0.tsfile ... |
| device root.vehicle.d0, start time 3000 (1970-01-01T08:00:03+08:00[GMT+08:00]), end time 100999 (1970-01-01T08:01:40.999+08:00[GMT+08:00]) |
| analyzing the resource file finished. |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br></div></div><h4 id="_1-3-2-tsfile素描工具"><a href="#_1-3-2-tsfile素描工具" class="header-anchor">#</a> 1.3.2 TsFile素描工具</h4> <p>构建服务器后，此工具的启动脚本将出现在<code>server \ target \ iotdb-server-0.9.2 \ tools</code>目录下。</p> <p>命令：</p> <p>对于Windows：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>.\print-tsfile-sketch.bat <path of your TsFile> (<path of the file for saving the output result>) |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><ul><li>请注意，如果未设置 <code><path of the file for saving the output result></code>，则将使用默认路径"TsFile_sketch_view.txt"。</li></ul> <p>对于Linux或Mac OS：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>./print-tsfile-sketch.sh <path of your TsFile> (<path of the file for saving the output result>) |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><ul><li>请注意，如果未设置 <code><path of the file for saving the output result></code> , 则将使用默认路径"TsFile_sketch_view.txt"。</li></ul> <p>Windows上的示例：</p> <div class="language-$xslt line-numbers-mode"><pre class="language-text"><code>D:\incubator-iotdb\server\target\iotdb-server-0.9.2\tools>.\print-tsfile-sketch.bat D:\data\data\sequence\root.vehicle\1572496142067-101-0.tsfile |
| ```````````````````````` |
| Starting Printing the TsFile Sketch |
| ```````````````````````` |
| TsFile path:D:\data\data\sequence\root.vehicle\1572496142067-101-0.tsfile |
| Sketch save path:TsFile_sketch_view.txt |
| -------------------------------- TsFile Sketch -------------------------------- |
| file path: D:\data\data\sequence\root.vehicle\1572496142067-101-0.tsfile |
| file length: 187382 |
| |
| POSITION| CONTENT |
| -------- ------- |
| 0| [magic head] TsFile |
| 6| [version number] 000001 |
| ||||||||||||||||||||| [Chunk Group] of root.vehicle.d0 begins at pos 12, ends at pos 186469, version:102, num of Chunks:6 |
| 12| [Chunk] of s3, numOfPoints:10600, time range:[3000,13599], tsDataType:TEXT, |
| TsDigest:[min_value:A,max_value:E,first_value:A,last_value:E,sum_value:0.0] |
| | [marker] 1 |
| | [ChunkHeader] |
| | 11 pages |
| 55718| [Chunk] of s4, numOfPoints:10600, time range:[3000,13599], tsDataType:BOOLEAN, |
| TsDigest:[min_value:false,max_value:true,first_value:true,last_value:false,sum_value:0.0] |
| | [marker] 1 |
| | [ChunkHeader] |
| | 11 pages |
| 68848| [Chunk] of s5, numOfPoints:10600, time range:[3000,13599], tsDataType:DOUBLE, |
| TsDigest:[min_value:3000.0,max_value:13599.0,first_value:3000.0,last_value:13599.0,sum_value:8.79747E7] |
| | [marker] 1 |
| | [ChunkHeader] |
| | 11 pages |
| 98474| [Chunk] of s0, numOfPoints:21900, time range:[3000,100999], tsDataType:INT32, |
| TsDigest:[min_value:0,max_value:99,first_value:0,last_value:19,sum_value:889750.0] |
| | [marker] 1 |
| | [ChunkHeader] |
| | 22 pages |
| 123369| [Chunk] of s1, numOfPoints:21900, time range:[3000,100999], tsDataType:INT64, |
| TsDigest:[min_value:0,max_value:39,first_value:8,last_value:19,sum_value:300386.0] |
| | [marker] 1 |
| | [ChunkHeader] |
| | 22 pages |
| 144741| [Chunk] of s2, numOfPoints:21900, time range:[3000,100999], tsDataType:FLOAT, |
| TsDigest:[min_value:0.0,max_value:122.0,first_value:8.0,last_value:52.0,sum_value:778581.0] |
| | [marker] 1 |
| | [ChunkHeader] |
| | 22 pages |
| 186437| [Chunk Group Footer] |
| | [marker] 0 |
| | [deviceID] root.vehicle.d0 |
| | [dataSize] 186425 |
| | [num of chunks] 6 |
| ||||||||||||||||||||| [Chunk Group] of root.vehicle.d0 ends |
| 186469| [marker] 2 |
| 186470| [TsDeviceMetadata] of root.vehicle.d0, startTime:3000, endTime:100999 |
| | [startTime] 3000tfi |
| | [endTime] 100999 |
| | [num of ChunkGroupMetaData] 1 |
| | 1 ChunkGroupMetaData |
| 187133| [TsFileMetaData] |
| | [num of devices] 1 |
| | 1 key&TsDeviceMetadataIndex |
| | [num of measurements] 6 |
| | 6 key&measurementSchema |
| | [createBy isNotNull] false |
| | [totalChunkNum] 6 |
| | [invalidChunkNum] 0 |
| | [bloom filter bit vector byte array length] 31 |
| | [bloom filter bit vector byte array] |
| | [bloom filter number of bits] 256 |
| | [bloom filter number of hash functions] 5 |
| 187372| [TsFileMetaDataSize] 239 |
| 187376| [magic tail] TsFile |
| 187382| END of TsFile |
| |
| ---------------------------------- TsFile Sketch End ---------------------------------- |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br><span class="line-number">35</span><br><span class="line-number">36</span><br><span class="line-number">37</span><br><span class="line-number">38</span><br><span class="line-number">39</span><br><span class="line-number">40</span><br><span class="line-number">41</span><br><span class="line-number">42</span><br><span class="line-number">43</span><br><span class="line-number">44</span><br><span class="line-number">45</span><br><span class="line-number">46</span><br><span class="line-number">47</span><br><span class="line-number">48</span><br><span class="line-number">49</span><br><span class="line-number">50</span><br><span class="line-number">51</span><br><span class="line-number">52</span><br><span class="line-number">53</span><br><span class="line-number">54</span><br><span class="line-number">55</span><br><span class="line-number">56</span><br><span class="line-number">57</span><br><span class="line-number">58</span><br><span class="line-number">59</span><br><span class="line-number">60</span><br><span class="line-number">61</span><br><span class="line-number">62</span><br><span class="line-number">63</span><br><span class="line-number">64</span><br><span class="line-number">65</span><br><span class="line-number">66</span><br><span class="line-number">67</span><br><span class="line-number">68</span><br><span class="line-number">69</span><br><span class="line-number">70</span><br><span class="line-number">71</span><br><span class="line-number">72</span><br><span class="line-number">73</span><br><span class="line-number">74</span><br></div></div><h4 id="_1-3-3-tsfilesequenceread"><a href="#_1-3-3-tsfilesequenceread" class="header-anchor">#</a> 1.3.3 TsFileSequenceRead</h4> <p>您也可以使用<code>example / tsfile / org / apache / iotdb / tsfile / TsFileSequenceRead</code>顺序打印TsFile的内容。</p> <h3 id="_1-4-tsfile可视化示例"><a href="#_1-4-tsfile可视化示例" class="header-anchor">#</a> 1.4 TsFile可视化示例</h3> <h4 id="v0-8-x"><a href="#v0-8-x" class="header-anchor">#</a> v0.8.x</h4> <img src="https://user-images.githubusercontent.com/33376433/65209576-2bd36000-dacb-11e9-9e43-49e0dd01274e.png" style="width:100%;max-width:800px;max-height:600px;margin-left:auto;margin-right:auto;display:block;"> <h4 id="v0-9-x"><a href="#v0-9-x" class="header-anchor">#</a> v0.9.x</h4> <img src="https://user-images.githubusercontent.com/33376433/68128717-35b60300-ff53-11e9-919e-48d80536df88.png" style="width:100%;max-width:800px;max-height:600px;margin-left:auto;margin-right:auto;display:block;"></div> <div class="page-nav"><p class="inner"><span class="prev"> |
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| </span></p></div> <p style="text-align: center;">Copyright © 2020 The Apache Software Foundation.<br> |
| Apache and the Apache feather logo are trademarks of The Apache Software Foundation</p> <p style="text-align:justify!important;paddingLeft:10px;paddingRight:10px;"> |
| Disclaimer: Apache IoTDB (incubating) is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF. |
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