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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>系统设计</span> <!----></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>应用概览</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>TsFile</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>查询引擎</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>元数据管理</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading open"><span>存储引擎</span> <span class="arrow down"></span></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/zh/SystemDesign/StorageEngine/FileLists.html" aria-current="page" class="active sidebar-link">磁盘文件汇总</a></li><li><a href="/zh/SystemDesign/StorageEngine/StorageEngine.html" class="sidebar-link">存储引擎</a></li><li><a href="/zh/SystemDesign/StorageEngine/WAL.html" class="sidebar-link">写前日志</a></li><li><a href="/zh/SystemDesign/StorageEngine/FlushManager.html" class="sidebar-link">FlushManager</a></li><li><a href="/zh/SystemDesign/StorageEngine/MergeManager.html" class="sidebar-link">文件合并机制</a></li><li><a href="/zh/SystemDesign/StorageEngine/DataPartition.html" class="sidebar-link">数据分区</a></li><li><a href="/zh/SystemDesign/StorageEngine/DataManipulation.html" class="sidebar-link">数据增删改</a></li><li><a href="/zh/SystemDesign/StorageEngine/Recover.html" class="sidebar-link">重启恢复</a></li><li><a href="/zh/SystemDesign/StorageEngine/Compaction.html" class="sidebar-link">文件合并</a></li></ul></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>数据查询</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>工具</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>连接器</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>客户端</span> <span class="arrow right"></span></p> <!----></section></li></ul> </aside> <main class="page"> <div class="content content__default"><h1 id="磁盘文件汇总"><a href="#磁盘文件汇总" class="header-anchor">#</a> 磁盘文件汇总</h1> <h2 id="系统文件目录-data-system"><a href="#系统文件目录-data-system" class="header-anchor">#</a> 系统文件目录 data/system</h2> <ul><li><p>data/system/schema/mlog.txt (元数据日志)</p> <p>http://iotdb.apache.org/SystemDesign/SchemaManager/SchemaManager.html#log-management-of-metadata</p></li> <li><p>data/system/schema/system.properties (系统不可变参数)</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>partition_interval=9223372036854775807
timestamp_precision=ms
tsfile_storage_fs=LOCAL
enable_partition=false
max_degree_of_index_node=256
tag_attribute_total_size=700
iotdb_version=UNKNOWN
</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></li> <li><p>data/system/schema/tlog.txt (标签、属性文件）</p> <p>http://iotdb.apache.org/SystemDesign/SchemaManager/SchemaManager.html#tlog</p></li> <li><p>data/system/storage_groups/{sg_name}/{partition}/Version-xxx （每个分区的版本控制文件，无内容）</p></li> <li><p>data/system/storage_groups/upgrade/Version-xxx (升级过程的版本控制文件)</p></li> <li><p>data/system/upgrade/upgrade.txt (升级日志文件)</p></li></ul> <p>格式：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>oldTsFilePath,UpgradeCheckStatus
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><ul><li>UpgradeCheckStatus: 表示文件的升级状态
<ul><li>BEGIN_UPGRADE_FILE(1): 待升级的文件</li> <li>AFTER_UPGRADE_FILE(2): 升级后的文件已经封口</li> <li>UPGRADE_SUCCESS(3): 完成了旧文件删除，移动新文件</li></ul></li></ul> <p>示例：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>xxx/root.group_11/upgrade/1587634378188-101-0.tsfile,1
xxx/root.group_11/upgrade/1587634378188-101-0.tsfile,2
xxx/root.group_11/upgrade/1587634378188-101-0.tsfile,3
...
</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></div></div><ul><li>data/system/users/{user_name}.profile (用户信息)</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>1. username (UTF-8)
2. password (UTF-8)
3. privilegeNumber n (int)
4. n privileges (Privelege)
5. rolNumber k (int)
6. k role names (UTF-8)
7. UseWaterMarkFlag (Boolean)
</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><ul><li>data/system/roles/ (权限信息)</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>1. roleName (UTF-8)
2. privilegeNumber n (int)
3. n privileges (Privilege)
</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>Privilege 格式</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>1. bindingPath (UTF-8)
2. privilegeNumber n (int)
3. n privilegeOrdinals (int)
</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><h2 id="数据文件目录-data-data"><a href="#数据文件目录-data-data" class="header-anchor">#</a> 数据文件目录 data/data</h2> <ul><li>data/data/sequence/{storage_group}/{partition}/{timestamp}-{version}-{merge_times}.tsfile (数据文件)</li></ul> <p>http://iotdb.apache.org/SystemDesign/TsFile/Format.html#_1-2-tsfile-overview</p> <ul><li>data/data/sequence/{storage_group}/{partition}/{tsfile}.resource (对应TsFile的设备时间索引)</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>deviceId(String),start_time(long)
deviceId(String),start_time(long)
deviceId(String),end_time(long)
deviceId(String),end_time(long)
</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></div></div><ul><li>data/data/sequence/{storage_group}/{partition}/{tsfile}.mods (数据修改操作标记)</li></ul> <p>http://iotdb.apache.org/SystemDesign/DataQuery/QueryFundamentals.html#query-with-modifications</p> <ul><li><p>data/data/sequence/{storage_group}/{partition}/{tsfile}-{level}-{timestamp}.vm (未封口的 TsFile 文件)</p></li> <li><p>data/data/sequence/{storage_group}/{partition}/{tsfile}.flush (TsFile持久化memtable时的日志文件，无内容)</p></li> <li><p>data/data/sequence/{storage_group}/{partition}/{tsfile}.vm.log (合并 vm 的日志文件)</p></li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>源文件
文件path
目标文件
文件path
device，offset （已经合并的设备和目标文件完整的ChunkGroup的offset）
</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></div></div><h2 id="写前日志目录-data-wal"><a href="#写前日志目录-data-wal" class="header-anchor">#</a> 写前日志目录 data/wal</h2> <ul><li>data/wal/{storage_group}-{tsfile_name}/wal{x} (对应某个 TsFile 的写前日志文件)</li></ul> <p>文件格式为写入执行计划的序列化内容: InsertRowPlan、InsertTabletPlan、DeletePlan</p> <h2 id="性能追踪目录-data-tracing"><a href="#性能追踪目录-data-tracing" class="header-anchor">#</a> 性能追踪目录 data/tracing</h2> <ul><li>data/tracing/tracing.txt</li></ul> <p>性能追踪选项默认关闭，用户可以使用 <code>TRACING ON/OFF</code> 命令开启/关闭该功能。开启后，追踪日志记录在上述目录下，其格式为：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>QueryId - Start time
QueryId - Query statement
QueryId - Number of series paths
QueryId - Number of tsfiles
QueryId - Number of sequence files
QueryId - Number of unsequence files
QueryId - Number of chunks
QueryId - Average size of chunks
QueryId - End time
</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></div></div></div> <div class="page-nav"><p class="inner"><span class="prev">
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