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-->1.11.0<!-- -->).</div></div><div class="docItemContainer_Djhp"><article><nav class="theme-doc-breadcrumbs breadcrumbsContainer_Z_bl" aria-label="页面路径"><ul class="breadcrumbs" itemscope="" itemtype="https://schema.org/BreadcrumbList"><li class="breadcrumbs__item"><a aria-label="主页面" class="breadcrumbs__link" href="/zh-CN/"><svg viewBox="0 0 24 24" class="breadcrumbHomeIcon_YNFT"><path d="M10 19v-5h4v5c0 .55.45 1 1 1h3c.55 0 1-.45 1-1v-7h1.7c.46 0 .68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill="currentColor"></path></svg></a></li><li class="breadcrumbs__item"><span class="breadcrumbs__link">数据节点</span><meta itemprop="position" content="1"></li><li class="breadcrumbs__item"><span class="breadcrumbs__link">Load Nodes</span><meta itemprop="position" content="2"></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">HDFS</span><meta itemprop="position" content="3"></li></ul></nav><span class="theme-doc-version-badge badge badge--secondary">版本：1.9.0</span><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>HDFS</h1></header><h2 class="anchor anchorWithStickyNavbar_LWe7" id="概览">概览<a href="#概览" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h2><p>HDFS 连接器为 Flink 内部依赖，支持分区文件。 |
| 在 Flink 中包含了该文件系统连接器，不需要添加额外的依赖。 |
| 相应的 jar 包可以在 Flink 工程项目的 /lib 目录下找到。 |
| 从文件系统中读取或者向文件系统中写入行时，需要指定相应的 format。</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="如何创建-hdfs-加载节点">如何创建 HDFS 加载节点<a href="#如何创建-hdfs-加载节点" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="sql-api-的使用">SQL API 的使用<a href="#sql-api-的使用" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h3><p>使用 <code>Flink SQL Cli</code> :</p><div class="language-sql codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-sql codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">CREATE</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">TABLE</span><span class="token plain"> hdfs_load_node </span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> id STRING</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> name STRING</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> uv </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">BIGINT</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> pv </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">BIGINT</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> dt STRING</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token identifier">hour</span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token plain"> STRING</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token plain"> PARTITIONED </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">BY</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token plain">dt</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"> </span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token identifier">hour</span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">WITH</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'connector'</span><span class="token operator">=</span><span class="token string" style="color:rgb(255, 121, 198)">'filesystem-inlong'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'path'</span><span class="token operator">=</span><span class="token string" style="color:rgb(255, 121, 198)">'...'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'format'</span><span class="token operator">=</span><span class="token string" style="color:rgb(255, 121, 198)">'orc'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'sink.partition-commit.delay'</span><span class="token operator">=</span><span class="token string" style="color:rgb(255, 121, 198)">'1 h'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'sink.partition-commit.policy.kind'</span><span class="token operator">=</span><span class="token string" style="color:rgb(255, 121, 198)">'success-file'</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token punctuation" style="color:rgb(248, 248, 242)">;</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg class="copyButtonIcon_y97N" viewBox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg class="copyButtonSuccessIcon_LjdS" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h4 class="anchor anchorWithStickyNavbar_LWe7" id="file-formats">File Formats<a href="#file-formats" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h4><ul><li>CSV(非压缩格式)</li><li>JSON(文件系统连接器的 JSON format 与传统的标准的 JSON file 的不同，而是非压缩的。换行符分割的 JSON)</li><li>Avro(通过配置 avro.codec 属性支持压缩)</li><li>Parquet(与 hive 兼容)</li><li>Orc(与 hive 兼容)</li><li>Debezium-JSON</li><li>Canal-JSON</li><li>Raw</li></ul><p>备注：文件格式明细可以查看<a href="https://nightlies.apache.org/flink/flink-docs-master/zh/docs/connectors/table/formats/overview/" target="_blank" rel="noopener noreferrer">Flink Formats</a></p><h4 class="anchor anchorWithStickyNavbar_LWe7" id="滚动策略">滚动策略<a href="#滚动策略" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h4><p>数据会被加载到文件的目录下的 part 文件中，每个分区接收到来之 subtask 的数据至少会为该分区生成一个 part 文件。同时可以配置滚动策略 |
| 来生成 part 文件，生成 part 文件会将 in-progress part 文件关闭。该策略基于大小和指定文件被打开的超时时间来生成 part 文件。</p><table><thead><tr><th>参数</th><th>默认值</th><th>数据类型</th><th>描述</th></tr></thead><tbody><tr><td>sink.rolling-policy.file-size</td><td>128MB</td><td>MemorySize</td><td>滚动前 part 文件的最大值。</td></tr><tr><td>sink.rolling-policy.rollover-interval</td><td>30 min</td><td>String</td><td>滚动前，part 文件处于打开状态的最大时长（默认值30分钟，以避免产生大量小文件）。 检查频率是由 'sink.rolling-policy.check-interval' 属性控制的。</td></tr><tr><td>sink.rolling-policy.check-interval</td><td>1 min</td><td>String</td><td>基于时间的滚动策略的检查间隔。 该属性控制了基于 'sink.rolling-policy.rollover-interval' 属性检查文件是否该被滚动的检查频率。</td></tr></tbody></table><h4 class="anchor anchorWithStickyNavbar_LWe7" id="文件合并">文件合并<a href="#文件合并" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h4><p>支持文件能力，允许在较小的 checkpoint 下不产生大量的小文件。</p><table><thead><tr><th>参数</th><th>默认值</th><th>数据类型</th><th>描述</th></tr></thead><tbody><tr><td>auto-compaction</td><td>false</td><td>Boolean</td><td>在流式 sink 中是否开启自动合并功能，数据首先会被写入临时文件。 当 checkpoint 完成后，该检查点产生的临时文件会被合并，这些临时文件在合并前不可见。</td></tr><tr><td>compaction.file-size</td><td>(none)</td><td>String</td><td>合并目标文件大小，默认值为滚动文件大小。</td></tr><tr><td>inlong.metric.labels</td><td>(none)</td><td>String</td><td>inlong metric 的标签值，该值的构成为 groupId=g<!-- -->[groupId]<!-- -->&streamId=<!-- -->[streamId]<!-- -->&nodeId=<!-- -->[nodeId]<!-- -->。</td></tr></tbody></table><h4 class="anchor anchorWithStickyNavbar_LWe7" id="分区提交">分区提交<a href="#分区提交" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h4><p>分区数据写入完成后，一般需要通知下流应用。如：更新 hive 的元数据信息或者 hdfs 目录生成 _SUCCESS 文件。 |
| 分区提交策略是配置的，分区提交行为基于 triggers 和 policies 的组合。</p><ul><li>Trigger :分区提交时机可以基于分区的 watermark 或者基于处理时间（process-time）。</li><li>Policy :分区提交策略，内置策略包括提交 hive 元数据和生成 _SUCCESS 文件，同时支持自定策略，如生成 hive 的统计信息、合并小文件等。</li></ul><p>备注：分区提交仅支持动态分区插入。</p><table><thead><tr><th>参数</th><th>默认值</th><th>数据类型</th><th>描述</th></tr></thead><tbody><tr><td>sink.partition-commit.trigger</td><td>process-time</td><td>String</td><td>分区提交触发器类型： 'process-time'：基于机器时间既不需要分区时间提取器也不需要 watermark 生成器。 一旦 "当前系统时间" 超过了 "分区创建系统时间" 和 'sink.partition-commit.delay' 之和立即提交分区。<br>'partition-time'：基于提取的分区时间，需要 watermark 生成。一旦 watermark 超过了 "分区创建系统时间" 和 'sink.partition-commit.delay' 之和立即提交分区。</td></tr><tr><td>sink.partition-commit.delay</td><td>0 s</td><td>Duration</td><td>如果设置分区延迟提交，这个延迟时间之前不会提交。天：'d'；小时：'h';秒：'s'等</td></tr><tr><td>sink.partition-commit.watermark-time-zone</td><td>UTC</td><td>String</td><td>解析 Long 类型的 watermark 到 TIMESTAMP 类型时所采用的时区， 解析得到的 watermark 的 TIMESTAMP 会被用来跟分区时间进行比较以判断是否该被提交。 这个属性仅当 <!-- -->`<!-- -->sink.partition-commit.trigger<!-- -->`<!-- --> 被设置为 'partition-time' 时有效。 如果这个属性设置的不正确，例如在 TIMESTAMP<!-- -->_<!-- -->LTZ 类型的列上定义了 source rowtime， 如果没有设置该属性，那么用户可能会在若干个小时后才看到分区的提交。 默认值为 'UTC' 意味着 watermark 是定义在 TIMESTAMP 类型的列上或者没有定义 watermark。 如果 watermark 定义在 TIMESTAMP<!-- -->_<!-- -->LTZ 类型的列上，watermark 时区必须是会话时区（session time zone）。 该属性的可选值要么是完整的时区名比如 'America/Los_Angeles'，要么是自定义时区，例如 'GMT-08:00'。</td></tr></tbody></table><h4 class="anchor anchorWithStickyNavbar_LWe7" id="分区提交策略">分区提交策略<a href="#分区提交策略" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h4><p>分区提交策略定义了分区提交使用的具体策略。</p><ul><li>metastore：仅在 hive 时支持该策略。</li><li>success: part 文件生成后会生成 '_SUCCESS' 文件。</li></ul><table><thead><tr><th>参数</th><th>是否必须</th><th>默认值</th><th>数据类型</th><th>描述</th></tr></thead><tbody><tr><td>sink.partition-commit.policy.kind</td><td>可选</td><td>(none)</td><td>String</td><td>分区策略通知分区 part 生成可以被访问，仅 hive 支持 metastore 策略，文件系统生成 '_success' 文件表示文件写入完成。 两种策略的指定分别为 'metastore,success-file' ，也可以通过 custom 的指定的类创建提交策略。</td></tr><tr><td>sink.partition-commit.policy.class</td><td>可选</td><td>(none)</td><td>String</td><td>实现 PartitionCommitPolicy 接口的分区提交策略类，只有在 custom 提交策略下才使用该类。</td></tr><tr><td>sink.partition-commit.success-file.name</td><td>可选</td><td>_SUCCESS</td><td>String</td><td>使用 success-file 分区提交策略时的文件名，默认值是 '_SUCCESS'。</td></tr></tbody></table></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="https://github.com/apache/inlong-website/edit/master/versioned_docs/version-1.9.0/data_node/load_node/hdfs.md" target="_blank" rel="noreferrer noopener" class="theme-edit-this-page"><svg fill="currentColor" height="20" width="20" viewBox="0 0 40 40" class="iconEdit_Z9Sw" aria-hidden="true"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this 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