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class="search-icon" tabindex="0"></span><input type="search" id="search_input_react" placeholder="Loading..." aria-label="Search" class="navbar__search-input search-bar" disabled=""></div></div></div></div><div role="presentation" class="navbar-sidebar__backdrop"></div></nav><div id="__docusaurus_skipToContent_fallback" class="main-wrapper mainWrapper_z2l0 docsWrapper_BCFX"><button aria-label="Scroll back to top" class="clean-btn theme-back-to-top-button backToTopButton_sjWU" type="button"></button><div class="docPage__5DB"><main class="docMainContainer_gTbr docMainContainerEnhanced_Uz_u"><div class="container padding-top--md padding-bottom--lg"><div class="row"><div class="col docItemCol_VOVn"><div class="docItemContainer_Djhp"><article><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>JSON-based batch simple task indexing</h1></header><div class="theme-admonition theme-admonition-info alert alert--info admonition_LlT9"><div class="admonitionHeading_tbUL"><span class="admonitionIcon_kALy"><svg viewBox="0 0 14 16"><path fill-rule="evenodd" d="M7 2.3c3.14 0 5.7 2.56 5.7 5.7s-2.56 5.7-5.7 5.7A5.71 5.71 0 0 1 1.3 8c0-3.14 2.56-5.7 5.7-5.7zM7 1C3.14 1 0 4.14 0 8s3.14 7 7 7 7-3.14 7-7-3.14-7-7-7zm1 3H6v5h2V4zm0 6H6v2h2v-2z"></path></svg></span>info</div><div class="admonitionContent_S0QG"><p> This page describes native batch ingestion using <a href="/docs/latest/ingestion/ingestion-spec">ingestion specs</a>. Refer to the <a href="/docs/latest/ingestion/#batch">ingestion
 methods</a> table to determine which ingestion method is right for you.</p></div></div><p>The simple task (<a href="/docs/latest/ingestion/tasks">task type</a> <code>index</code>) executes single-threaded as a single task within the indexing service. For parallel, scalable options consider using <a href="/docs/latest/ingestion/native-batch"><code>index_parallel</code> tasks</a> or <a href="/docs/latest/multi-stage-query/">SQL-based batch ingestion</a>.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="simple-task-example">Simple task example<a href="#simple-task-example" class="hash-link" aria-label="Direct link to Simple task example" title="Direct link to Simple task example"></a></h2><p>A sample task is shown below:</p><div class="language-json codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-json codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token 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property">&quot;type&quot;</span><span class="token plain"> </span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">&quot;uniform&quot;</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        </span><span class="token property">&quot;segmentGranularity&quot;</span><span class="token plain"> </span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">&quot;DAY&quot;</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        </span><span class="token property">&quot;queryGranularity&quot;</span><span class="token plain"> </span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">&quot;NONE&quot;</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        </span><span class="token property">&quot;intervals&quot;</span><span class="token plain"> </span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">[</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">&quot;2013-08-31/2013-09-01&quot;</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">]</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">      </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">    </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">    </span><span class="token property">&quot;ioConfig&quot;</span><span class="token plain"> </span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">      </span><span class="token property">&quot;type&quot;</span><span class="token plain"> </span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">&quot;index&quot;</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">      </span><span class="token property">&quot;inputSource&quot;</span><span class="token plain"> </span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        </span><span class="token property">&quot;type&quot;</span><span class="token plain"> </span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">&quot;local&quot;</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        </span><span class="token property">&quot;baseDir&quot;</span><span class="token plain"> </span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">&quot;examples/indexing/&quot;</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        </span><span class="token property">&quot;filter&quot;</span><span class="token plain"> </span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">&quot;wikipedia_data.json&quot;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">       </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">       </span><span class="token property">&quot;inputFormat&quot;</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">         </span><span class="token property">&quot;type&quot;</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">&quot;json&quot;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">       </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">    </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">    </span><span class="token property">&quot;tuningConfig&quot;</span><span class="token plain"> </span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">      </span><span class="token property">&quot;type&quot;</span><span class="token plain"> </span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">&quot;index&quot;</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">      </span><span class="token property">&quot;partitionsSpec&quot;</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        </span><span class="token property">&quot;type&quot;</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">&quot;single_dim&quot;</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        </span><span class="token property">&quot;partitionDimension&quot;</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">&quot;country&quot;</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        </span><span class="token property">&quot;targetRowsPerSegment&quot;</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">5000000</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">      </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">    </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">  </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</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 viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" 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 viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithStickyNavbar_LWe7" id="simple-task-configuration">Simple task configuration<a href="#simple-task-configuration" class="hash-link" aria-label="Direct link to Simple task configuration" title="Direct link to Simple task configuration"></a></h2><table><thead><tr><th>property</th><th>description</th><th>required?</th></tr></thead><tbody><tr><td>type</td><td>The task type, this should always be <code>index</code>.</td><td>yes</td></tr><tr><td>id</td><td>The task ID. If this is not explicitly specified, Druid generates the task ID using task type, data source name, interval, and date-time stamp.</td><td>no</td></tr><tr><td>spec</td><td>The ingestion spec including the <a href="#dataschema">data schema</a>, <a href="#ioconfig">IO config</a>, and <a href="#tuningconfig">tuning config</a>.</td><td>yes</td></tr><tr><td>context</td><td>Context to specify various task configuration parameters. See <a href="/docs/latest/ingestion/tasks#context-parameters">Task context parameters</a> for more details.</td><td>no</td></tr></tbody></table><h3 class="anchor anchorWithStickyNavbar_LWe7" id="dataschema"><code>dataSchema</code><a href="#dataschema" class="hash-link" aria-label="Direct link to dataschema" title="Direct link to dataschema"></a></h3><p>This field is required.</p><p>See the <a href="/docs/latest/ingestion/ingestion-spec#dataschema"><code>dataSchema</code></a> section of the ingestion docs for details.</p><p>If you do not specify <code>intervals</code> explicitly in your dataSchema&#x27;s granularitySpec, the Local Index Task will do an extra
 pass over the data to determine the range to lock when it starts up.  If you specify <code>intervals</code> explicitly, any rows
 outside the specified intervals will be thrown away. We recommend setting <code>intervals</code> explicitly if you know the time
 range of the data because it allows the task to skip the extra pass, and so that you don&#x27;t accidentally replace data outside
 that range if there&#x27;s some stray data with unexpected timestamps.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="ioconfig"><code>ioConfig</code><a href="#ioconfig" class="hash-link" aria-label="Direct link to ioconfig" title="Direct link to ioconfig"></a></h3><table><thead><tr><th>property</th><th>description</th><th>default</th><th>required?</th></tr></thead><tbody><tr><td>type</td><td>The task type, this should always be &quot;index&quot;.</td><td>none</td><td>yes</td></tr><tr><td>inputFormat</td><td><a href="/docs/latest/ingestion/data-formats#input-format"><code>inputFormat</code></a> to specify how to parse input data.</td><td>none</td><td>yes</td></tr><tr><td>appendToExisting</td><td>Creates segments as additional shards of the latest version, effectively appending to the segment set instead of replacing it. This means that you can append new segments to any datasource regardless of its original partitioning scheme. You must use the <code>dynamic</code> partitioning type for the appended segments. If you specify a different partitioning type, the task fails with an error.</td><td>false</td><td>no</td></tr><tr><td>dropExisting</td><td>If this setting is <code>false</code> then ingestion proceeds as usual. Set this to <code>true</code> and <code>appendToExisting</code> to <code>false</code> to enforce true &quot;replace&quot; functionality as described next. If <code>true</code> and <code>appendToExisting</code> is <code>false</code> and the <code>granularitySpec</code> contains at least one<code>interval</code>, then the ingestion task will create regular segments for time chunk intervals with input data and <code>tombstones</code> for all other time chunks with no data. The task will publish the data segments and the tombstone segments together when the it publishes new segments. The net effect of the data segments and the tombstones is to completely adhere to a &quot;replace&quot; semantics where the  input data contained in the <code>granularitySpec</code> intervals replaces all existing data in the intervals even for time chunks that would be empty in the case that no input data was associated with them. In the extreme case when the input data set that falls in the <code>granularitySpec</code> intervals is empty all existing data in the interval will be replaced with an empty data set (i.e. with nothing -- all existing data will be covered by <code>tombstones</code>). If ingestion fails, no segments and tombstones will be published. The following two combinations are not supported and will make the ingestion fail with an error: <code>dropExisting</code> is <code>true</code> and <code>interval</code> is not specified in <code>granularitySpec</code> or  <code>appendToExisting</code> is true and <code>dropExisting</code> is <code>true</code>. WARNING: this functionality is still in beta and even though we are not aware of any bugs, use with caution.</td><td>false</td><td>no</td></tr></tbody></table><h3 class="anchor anchorWithStickyNavbar_LWe7" id="tuningconfig"><code>tuningConfig</code><a href="#tuningconfig" class="hash-link" aria-label="Direct link to tuningconfig" title="Direct link to tuningconfig"></a></h3><p>The tuningConfig is optional and default parameters will be used if no tuningConfig is specified. See below for more details.</p><table><thead><tr><th>property</th><th>description</th><th>default</th><th>required?</th></tr></thead><tbody><tr><td>type</td><td>The task type, this should always be &quot;index&quot;.</td><td>none</td><td>yes</td></tr><tr><td>maxRowsInMemory</td><td>Used in determining when intermediate persists to disk should occur. Normally user does not need to set this, but depending on the nature of data, if rows are short in terms of bytes, user may not want to store a million rows in memory and this value should be set.</td><td>1000000</td><td>no</td></tr><tr><td>maxBytesInMemory</td><td>Used in determining when intermediate persists to disk should occur. Normally this is computed internally and user does not need to set it. This value represents number of bytes to aggregate in heap memory before persisting. This is based on a rough estimate of memory usage and not actual usage. The maximum heap memory usage for indexing is maxBytesInMemory * (2 + maxPendingPersists). Note that <code>maxBytesInMemory</code> also includes heap usage of artifacts created from intermediary persists. This means that after every persist, the amount of <code>maxBytesInMemory</code> until next persist will decreases, and task will fail when the sum of bytes of all intermediary persisted artifacts exceeds <code>maxBytesInMemory</code>.</td><td>1/6 of max JVM memory</td><td>no</td></tr><tr><td>maxTotalRows</td><td>Deprecated. Use <code>partitionsSpec</code> instead. Total number of rows in segments waiting for being pushed. Used in determining when intermediate pushing should occur.</td><td>20000000</td><td>no</td></tr><tr><td>numShards</td><td>Deprecated. Use <code>partitionsSpec</code> instead. Directly specify the number of shards to create. If this is specified and <code>intervals</code> is specified in the <code>granularitySpec</code>, the index task can skip the determine intervals/partitions pass through the data.</td><td>null</td><td>no</td></tr><tr><td>partitionDimensions</td><td>Deprecated. Use <code>partitionsSpec</code> instead. The dimensions to partition on. Leave blank to select all dimensions. Only used with <code>forceGuaranteedRollup</code> = true, will be ignored otherwise.</td><td>null</td><td>no</td></tr><tr><td>partitionsSpec</td><td>Defines how to partition data in each timeChunk, see <a href="#partitionsspec">PartitionsSpec</a></td><td><code>dynamic</code> if <code>forceGuaranteedRollup</code> = false, <code>hashed</code> if <code>forceGuaranteedRollup</code> = true</td><td>no</td></tr><tr><td>indexSpec</td><td>Defines segment storage format options to be used at indexing time, see <a href="/docs/latest/ingestion/ingestion-spec#indexspec">IndexSpec</a></td><td>null</td><td>no</td></tr><tr><td>indexSpecForIntermediatePersists</td><td>Defines segment storage format options to be used at indexing time for intermediate persisted temporary segments. This can be used to disable dimension/metric compression on intermediate segments to reduce memory required for final merging. However, disabling compression on intermediate segments might increase page cache use while they are used before getting merged into final segment published, see <a href="/docs/latest/ingestion/ingestion-spec#indexspec">IndexSpec</a> for possible values.</td><td>same as indexSpec</td><td>no</td></tr><tr><td>maxPendingPersists</td><td>Maximum number of persists that can be pending but not started. If this limit would be exceeded by a new intermediate persist, ingestion will block until the currently-running persist finishes. Maximum heap memory usage for indexing scales with maxRowsInMemory * (2 + maxPendingPersists).</td><td>0 (meaning one persist can be running concurrently with ingestion, and none can be queued up)</td><td>no</td></tr><tr><td>forceGuaranteedRollup</td><td>Forces guaranteeing the <a href="/docs/latest/ingestion/rollup">perfect rollup</a>. The perfect rollup optimizes the total size of generated segments and querying time while indexing time will be increased. If this is set to true, the index task will read the entire input data twice: one for finding the optimal number of partitions per time chunk and one for generating segments. Note that the result segments would be hash-partitioned. This flag cannot be used with <code>appendToExisting</code> of IOConfig. For more details, see the below <strong>Segment pushing modes</strong> section.</td><td>false</td><td>no</td></tr><tr><td>reportParseExceptions</td><td>DEPRECATED. If true, exceptions encountered during parsing will be thrown and will halt ingestion; if false, unparseable rows and fields will be skipped. Setting <code>reportParseExceptions</code> to true will override existing configurations for <code>maxParseExceptions</code> and <code>maxSavedParseExceptions</code>, setting <code>maxParseExceptions</code> to 0 and limiting <code>maxSavedParseExceptions</code> to no more than 1.</td><td>false</td><td>no</td></tr><tr><td>pushTimeout</td><td>Milliseconds to wait for pushing segments. It must be &gt;= 0, where 0 means to wait forever.</td><td>0</td><td>no</td></tr><tr><td>segmentWriteOutMediumFactory</td><td>Segment write-out medium to use when creating segments. See <a href="/docs/latest/ingestion/native-batch#segmentwriteoutmediumfactory">SegmentWriteOutMediumFactory</a>.</td><td>Not specified, the value from <code>druid.peon.defaultSegmentWriteOutMediumFactory.type</code> is used</td><td>no</td></tr><tr><td>logParseExceptions</td><td>If true, log an error message when a parsing exception occurs, containing information about the row where the error occurred.</td><td>false</td><td>no</td></tr><tr><td>maxParseExceptions</td><td>The maximum number of parse exceptions that can occur before the task halts ingestion and fails. Overridden if <code>reportParseExceptions</code> is set.</td><td>unlimited</td><td>no</td></tr><tr><td>maxSavedParseExceptions</td><td>When a parse exception occurs, Druid can keep track of the most recent parse exceptions. &quot;maxSavedParseExceptions&quot; limits how many exception instances will be saved. These saved exceptions will be made available after the task finishes in the <a href="/docs/latest/ingestion/tasks#task-reports">task completion report</a>. Overridden if <code>reportParseExceptions</code> is set.</td><td>0</td><td>no</td></tr></tbody></table><h3 class="anchor anchorWithStickyNavbar_LWe7" id="partitionsspec"><code>partitionsSpec</code><a href="#partitionsspec" class="hash-link" aria-label="Direct link to partitionsspec" title="Direct link to partitionsspec"></a></h3><p>PartitionsSpec is to describe the secondary partitioning method.
 You should use different partitionsSpec depending on the <a href="/docs/latest/ingestion/rollup">rollup mode</a> you want.
 For perfect rollup, you should use <code>hashed</code>.</p><table><thead><tr><th>property</th><th>description</th><th>default</th><th>required?</th></tr></thead><tbody><tr><td>type</td><td>This should always be <code>hashed</code></td><td>none</td><td>yes</td></tr><tr><td>maxRowsPerSegment</td><td>Used in sharding. Determines how many rows are in each segment.</td><td>5000000</td><td>no</td></tr><tr><td>numShards</td><td>Directly specify the number of shards to create. If this is specified and <code>intervals</code> is specified in the <code>granularitySpec</code>, the index task can skip the determine intervals/partitions pass through the data. <code>numShards</code> cannot be specified if <code>maxRowsPerSegment</code> is set.</td><td>null</td><td>no</td></tr><tr><td>partitionDimensions</td><td>The dimensions to partition on. Leave blank to select all dimensions.</td><td>null</td><td>no</td></tr><tr><td>partitionFunction</td><td>A function to compute hash of partition dimensions. See <a href="/docs/latest/ingestion/native-batch#hash-partition-function">Hash partition function</a></td><td><code>murmur3_32_abs</code></td><td>no</td></tr></tbody></table><p>For best-effort rollup, you should use <code>dynamic</code>.</p><table><thead><tr><th>property</th><th>description</th><th>default</th><th>required?</th></tr></thead><tbody><tr><td>type</td><td>This should always be <code>dynamic</code></td><td>none</td><td>yes</td></tr><tr><td>maxRowsPerSegment</td><td>Used in sharding. Determines how many rows are in each segment.</td><td>5000000</td><td>no</td></tr><tr><td>maxTotalRows</td><td>Total number of rows in segments waiting for being pushed.</td><td>20000000</td><td>no</td></tr></tbody></table><h2 class="anchor anchorWithStickyNavbar_LWe7" id="segment-pushing-modes">Segment pushing modes<a href="#segment-pushing-modes" class="hash-link" aria-label="Direct link to Segment pushing modes" title="Direct link to Segment pushing modes"></a></h2><p>While ingesting data using the simple task indexing, Druid creates segments from the input data and pushes them. For segment pushing,
 the simple task index supports the following segment pushing modes based upon your type of <a href="/docs/latest/ingestion/rollup">rollup</a>:</p><ul><li>Bulk pushing mode: Used for perfect rollup. Druid pushes every segment at the very end of the index task. Until then, Druid stores created segments in memory and local storage of the service running the index task. This mode can cause problems if you have limited storage capacity, and is not recommended to use in production.
 To enable bulk pushing mode, set <code>forceGuaranteedRollup</code> in your TuningConfig. You can not use bulk pushing with <code>appendToExisting</code> in your IOConfig.</li><li>Incremental pushing mode: Used for best-effort rollup. Druid pushes segments are incrementally during the course of the indexing task. The index task collects data and stores created segments in the memory and disks of the services running the task until the total number of collected rows exceeds <code>maxTotalRows</code>. At that point the index task immediately pushes all segments created up until that moment, cleans up pushed segments, and continues to ingest the remaining data.</li></ul></div></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages"></nav></div></div><div class="col col--3"><div class="tableOfContents_bqdL thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#simple-task-example" class="table-of-contents__link toc-highlight">Simple task example</a></li><li><a href="#simple-task-configuration" class="table-of-contents__link toc-highlight">Simple task configuration</a><ul><li><a href="#dataschema" class="table-of-contents__link toc-highlight"><code>dataSchema</code></a></li><li><a href="#ioconfig" class="table-of-contents__link toc-highlight"><code>ioConfig</code></a></li><li><a href="#tuningconfig" class="table-of-contents__link toc-highlight"><code>tuningConfig</code></a></li><li><a href="#partitionsspec" class="table-of-contents__link toc-highlight"><code>partitionsSpec</code></a></li></ul></li><li><a href="#segment-pushing-modes" class="table-of-contents__link toc-highlight">Segment pushing modes</a></li></ul></div></div></div></div></main></div></div><footer class="footer"><div class="container container-fluid"><div class="footer__bottom text--center"><div class="margin-bottom--sm"><img src="/img/favicon.png" class="themedImage_ToTc themedImage--light_HNdA footer__logo"><img src="/img/favicon.png" class="themedImage_ToTc themedImage--dark_i4oU footer__logo"></div><div class="footer__copyright">Copyright © 2023 Apache Software Foundation. Except where otherwise noted, licensed under CC BY-SA 4.0. Apache Druid, Druid, and the Druid logo are either registered trademarks or trademarks of The Apache Software Foundation in the United States and other countries.</div></div></div></footer></div>
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