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    <link rel="alternate" hreflang="en-us" href="https://iotdb.apache.org/UserGuide/V0.13.x/Data-Concept/Time-Partition.html"><meta property="og:url" content="https://iotdb.apache.org/zh/UserGuide/V0.13.x/Data-Concept/Time-Partition.html"><meta property="og:site_name" content="IoTDB Website"><meta property="og:description" content="时间分区 主要功能 时间分区按照时间分割数据，一个时间分区用于保存某个时间范围内的所有数据。时间分区编号使用自然数表示，0 表示 1970 年 1 月 1 日，每隔 partition_interval 秒后加一。数据通过计算 timestamp / partition_interval 得到自己所在的时间分区编号，主要配置项如下所示： 注意：当前不建..."><meta property="og:type" content="article"><meta property="og:locale" content="zh-CN"><meta property="og:locale:alternate" content="en-US"><meta property="og:updated_time" content="2023-07-10T03:11:17.000Z"><meta property="article:modified_time" content="2023-07-10T03:11:17.000Z"><script type="application/ld+json">{"@context":"https://schema.org","@type":"Article","headline":"","image":[""],"dateModified":"2023-07-10T03:11:17.000Z","author":[]}</script><link rel="icon" href="/favicon.ico"><meta name="Description" content="Apache IoTDB: Time Series Database for IoT"><meta name="Keywords" content="TSDB, time series, time series database, IoTDB, IoT database, IoT data management,时序数据库, 时间序列管理, IoTDB, 物联网数据库, 实时数据库, 物联网数据管理, 物联网数据"><meta name="baidu-site-verification" content="wfKETzB3OT"><meta name="google-site-verification" content="mZWAoRY0yj_HAr-s47zHCGHzx5Ju-RVm5wDbPnwQYFo"><script type="text/javascript">
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end"></div></div><div class="vp-toc-wrapper"><ul class="vp-toc-list"><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level2" href="#时间分区">时间分区</a></li><li><ul class="vp-toc-list"><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#主要功能">主要功能</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#配置示例">配置示例</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#使用建议">使用建议</a></li><!----><!--]--></ul></li><!--]--></ul><div class="vp-toc-marker" style="top:-1.7rem;"></div></div><!--[--><!----><!--]--></aside></div><!--[--><!----><!--]--><div class="theme-hope-content"><h2 id="时间分区" tabindex="-1"><a class="header-anchor" href="#时间分区"><span>时间分区</span></a></h2><h3 id="主要功能" tabindex="-1"><a class="header-anchor" href="#主要功能"><span>主要功能</span></a></h3><p>时间分区按照时间分割数据，一个时间分区用于保存某个时间范围内的所有数据。时间分区编号使用自然数表示，0 表示 1970 年 1 月 1 日，每隔 partition_interval 秒后加一。数据通过计算 timestamp / partition_interval 得到自己所在的时间分区编号，主要配置项如下所示：</p><p>注意：当前不建议开启此功能。 如果打开，请计算合适的 concurrent_writing_time_partition 和 wal_buffer_size, 计算公式如 wal_buffer_size = MaxDirectMemorySizeInBytes * 0.3 / (storage_group_num * virtual_storage_group_num) / concurrent_writing_time_partition</p><ul><li>enable_partition</li></ul><table><thead><tr><th style="text-align:center;">名字</th><th style="text-align:left;">enable_partition</th></tr></thead><tbody><tr><td style="text-align:center;">描述</td><td style="text-align:left;">是否开启将数据按时间分区存储的功能，如果关闭，所有数据都属于分区 0 (不建议开启此功能。 如果打开，请计算合适的 concurrent_writing_time_partition 和 wal_buffer_size)</td></tr><tr><td style="text-align:center;">类型</td><td style="text-align:left;">Bool</td></tr><tr><td style="text-align:center;">默认值</td><td style="text-align:left;">false</td></tr><tr><td style="text-align:center;">改后生效方式</td><td style="text-align:left;">仅允许在第一次启动服务前修改</td></tr></tbody></table><ul><li>partition_interval</li></ul><table><thead><tr><th style="text-align:center;">名字</th><th style="text-align:left;">partition_interval</th></tr></thead><tbody><tr><td style="text-align:center;">描述</td><td style="text-align:left;">存储组分区的时间段长度，用户指定的存储组下会使用该时间段进行分区，单位：秒</td></tr><tr><td style="text-align:center;">类型</td><td style="text-align:left;">Int64</td></tr><tr><td style="text-align:center;">默认值</td><td style="text-align:left;">604800</td></tr><tr><td style="text-align:center;">改后生效方式</td><td style="text-align:left;">仅允许在第一次启动服务前修改</td></tr></tbody></table><h3 id="配置示例" tabindex="-1"><a class="header-anchor" href="#配置示例"><span>配置示例</span></a></h3><p>开启时间分区功能，并设置 partition_interval 为 86400（一天），则数据的分布情况如下图所示：</p><img style="width:100%;max-width:800px;max-height:600px;margin-left:auto;margin-right:auto;display:block;" src="https://alioss.timecho.com/docs/img/UserGuide/Data-Concept/Time-Partition/time_partition_example.png?raw=true" alt="time partition example"><ul><li><p>插入一条时间戳为 0 的数据，计算 0 / 86400 = 0，则该数据会被存储到 0 号文件夹下的TsFile中</p></li><li><p>插入一条时间戳为 1609459200010 的数据，计算 1609459200010 / 86400 = 18628，则该数据会被存储到 18628 号文件夹下的TsFile中</p></li></ul><h3 id="使用建议" tabindex="-1"><a class="header-anchor" href="#使用建议"><span>使用建议</span></a></h3><p>使用时间分区功能时，建议同时打开 Memtable 的定时刷盘功能和 TsFileProcessor 的定时关闭功能，共 9 个相关配置参数（详情见 <a class="route-link" href="/zh/UserGuide/V0.13.x/Reference/Config-Manual.html">timed_flush与timed_close配置项</a>）。</p><ul><li><p>enable_timed_flush_unseq_memtable: 是否开启乱序 Memtable 的定时刷盘，默认打开。</p></li><li><p>enable_timed_flush_seq_memtable: 是否开启顺序 Memtable 的定时刷盘，默认关闭。应当在开启时间分区后打开，定时刷盘非活跃时间分区下的 Memtable，为定时关闭 TsFileProcessor 作准备。</p></li><li><p>enable_timed_close_tsfile: 是否开启 TsFileProcessor 的定时关闭，默认关闭。应当在开启时间分区后打开，定时关闭非活跃时间分区下的 TsFileProcessor，减少内存占用。</p></li></ul></div><!--[--><!----><!--]--><footer class="vp-page-meta"><div class="vp-meta-item edit-link"><a href="https://github.com/apache/iotdb-docs/edit/main/src/zh/UserGuide/V0.13.x/Data-Concept/Time-Partition.md" rel="noopener noreferrer" 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