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class="navGroups"><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Getting started<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/0.23.0/design/index.html">Introduction to Apache Druid</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/tutorials/index.html">Quickstart</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/tutorials/docker.html">Docker</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/single-server.html">Single server deployment</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/tutorials/cluster.html">Clustered deployment</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Tutorials<span class="arrow"><svg 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href="/docs/0.23.0/tutorials/tutorial-update-data.html">Updating existing data</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/tutorials/tutorial-compaction.html">Compacting segments</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/tutorials/tutorial-delete-data.html">Deleting data</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/tutorials/tutorial-ingestion-spec.html">Writing an ingestion spec</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/tutorials/tutorial-transform-spec.html">Transforming input data</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/tutorials/tutorial-kerberos-hadoop.html">Kerberized HDFS deep storage</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Design<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" 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fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem navListItemActive"><a class="navItem" href="/docs/0.23.0/ingestion/index.html">Ingestion</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/ingestion/data-formats.html">Data formats</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/ingestion/data-model.html">Data model</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/ingestion/rollup.html">Data rollup</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/ingestion/partitioning.html">Partitioning</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/ingestion/ingestion-spec.html">Ingestion spec</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/ingestion/schema-design.html">Schema design tips</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/ingestion/data-management.html">Data management</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/ingestion/compaction.html">Compaction</a></li><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Stream ingestion</h4><ul><li class="navListItem"><a class="navItem" href="/docs/0.23.0/development/extensions-core/kafka-ingestion.html">Apache Kafka ingestion</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/development/extensions-core/kafka-supervisor-reference.html">Apache Kafka supervisor</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/development/extensions-core/kafka-supervisor-operations.html">Apache Kafka operations</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/development/extensions-core/kinesis-ingestion.html">Amazon Kinesis</a></li></ul></div><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Batch ingestion</h4><ul><li class="navListItem"><a class="navItem" href="/docs/0.23.0/ingestion/native-batch.html">Native batch</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/ingestion/native-batch-simple-task.html">Simple task indexing</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/ingestion/native-batch-input-sources.html">Input sources</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/ingestion/native-batch-firehose.html">Firehose</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/ingestion/hadoop.html">Hadoop-based</a></li></ul></div><li class="navListItem"><a class="navItem" href="/docs/0.23.0/ingestion/tasks.html">Task reference</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/ingestion/faq.html">Troubleshooting FAQ</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Querying<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Druid SQL</h4><ul><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/sql.html">Overview and syntax</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/sql-data-types.html">SQL data types</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/sql-operators.html">Operators</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/sql-scalar.html">Scalar functions</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/sql-aggregations.html">Aggregation functions</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/sql-multivalue-string-functions.html">Multi-value string functions</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/sql-api.html">Druid SQL API</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/sql-jdbc.html">JDBC driver API</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/sql-query-context.html">SQL query context</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/sql-metadata-tables.html">SQL metadata tables</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/sql-translation.html">SQL query translation</a></li></ul></div><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/querying.html">Native queries</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/query-execution.html">Query execution</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/troubleshooting.html">Troubleshooting</a></li><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Concepts</h4><ul><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/datasource.html">Datasources</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/joins.html">Joins</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/lookups.html">Lookups</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/multi-value-dimensions.html">Multi-value dimensions</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/multitenancy.html">Multitenancy</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/caching.html">Query caching</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/using-caching.html">Using query caching</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/query-context.html">Query context</a></li></ul></div><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Native query types</h4><ul><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/timeseriesquery.html">Timeseries</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/topnquery.html">TopN</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/groupbyquery.html">GroupBy</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/scan-query.html">Scan</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/searchquery.html">Search</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/timeboundaryquery.html">TimeBoundary</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/segmentmetadataquery.html">SegmentMetadata</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/datasourcemetadataquery.html">DatasourceMetadata</a></li></ul></div><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Native query components</h4><ul><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/filters.html">Filters</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/granularities.html">Granularities</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/dimensionspecs.html">Dimensions</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/aggregations.html">Aggregations</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/post-aggregations.html">Post-aggregations</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/misc/math-expr.html">Expressions</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/having.html">Having filters (groupBy)</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/limitspec.html">Sorting and limiting (groupBy)</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/topnmetricspec.html">Sorting (topN)</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/sorting-orders.html">String comparators</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/querying/virtual-columns.html">Virtual columns</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/development/geo.html">Spatial filters</a></li></ul></div></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Configuration<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/0.23.0/configuration/index.html">Configuration reference</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/development/extensions.html">Extensions</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/configuration/logging.html">Logging</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Operations<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/druid-console.html">Web console</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/getting-started.html">Getting started with Apache Druid</a></li><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Security</h4><ul><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/security-overview.html">Security overview</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/security-user-auth.html">User authentication and authorization</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/auth-ldap.html">LDAP auth</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/password-provider.html">Password providers</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/dynamic-config-provider.html">Dynamic Config Providers</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/tls-support.html">TLS support</a></li></ul></div><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Performance tuning</h4><ul><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/basic-cluster-tuning.html">Basic cluster tuning</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/segment-optimization.html">Segment Size Optimization</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/mixed-workloads.html">Mixed workloads</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/http-compression.html">HTTP compression</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/clean-metadata-store.html">Automated metadata cleanup</a></li></ul></div><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Monitoring</h4><ul><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/request-logging.html">Request logging</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/metrics.html">Metrics</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/alerts.html">Alerts</a></li></ul></div><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/api-reference.html">API reference</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/high-availability.html">High availability</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/rolling-updates.html">Rolling updates</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/rule-configuration.html">Retaining or automatically dropping data</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/other-hadoop.html">Working with different versions of Apache Hadoop</a></li><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Misc</h4><ul><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/management-uis.html">Legacy Management UIs</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/dump-segment.html">dump-segment tool</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/reset-cluster.html">reset-cluster tool</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/insert-segment-to-db.html">insert-segment-to-db tool</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/pull-deps.html">pull-deps tool</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/deep-storage-migration.html">Deep storage migration</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/export-metadata.html">Export Metadata Tool</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/metadata-migration.html">Metadata Migration</a></li><li class="navListItem"><a class="navItem" href="/docs/0.23.0/operations/use_sbt_to_build_fat_jar.html">Content for build.sbt</a></li></ul></div></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Development<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" 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| <p>Loading data in Druid is called <em>ingestion</em> or <em>indexing</em>. When you ingest data into Druid, Druid reads the data from your source system and stores it in data files called <em>segments</em>. In general, segment files contain a few million rows.</p> |
| <p>For most ingestion methods, the Druid <a href="/docs/0.23.0/design/middlemanager.html">MiddleManager</a> processes or the <a href="/docs/0.23.0/design/indexer.html">Indexer</a> processes load your source data. One exception is |
| Hadoop-based ingestion, which uses a Hadoop MapReduce job on YARN MiddleManager or Indexer processes to start and monitor Hadoop jobs.</p> |
| <p>During ingestion Druid creates segments and stores them in <a href="/docs/0.23.0/dependencies/deep-storage.html">deep storage</a>. Historical nodes load the segments into memory to respond to queries. For streaming ingestion, the Middle Managers and indexers can respond to queries in real-time with arriving data. See the <a href="/docs/0.23.0/design/architecture.html#storage-design">Storage design</a> section of the Druid design documentation for more information.</p> |
| <p>This topic introduces streaming and batch ingestion methods. The following topics describe ingestion concepts and information that apply to all <a href="#ingestion-methods">ingestion methods</a>:</p> |
| <ul> |
| <li><a href="/docs/0.23.0/ingestion/data-model.html">Druid data model</a> introduces concepts of datasources, primary timestamp, dimensions, and metrics.</li> |
| <li><a href="/docs/0.23.0/ingestion/rollup.html">Data rollup</a> describes rollup as a concept and provides suggestions to maximize the benefits of rollup.</li> |
| <li><a href="/docs/0.23.0/ingestion/partitioning.html">Partitioning</a> describes time chunk and secondary partitioning in Druid.</li> |
| <li><a href="/docs/0.23.0/ingestion/ingestion-spec.html">Ingestion spec reference</a> provides a reference for the configuration options in the ingestion spec.</li> |
| </ul> |
| <p>For additional information about concepts and configurations that are unique to each ingestion method, see the topic for the ingestion method.</p> |
| <h2><a class="anchor" aria-hidden="true" id="ingestion-methods"></a><a href="#ingestion-methods" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Ingestion methods</h2> |
| <p>The tables below list Druid's most common data ingestion methods, along with comparisons to help you choose |
| the best one for your situation. Each ingestion method supports its own set of source systems to pull from. For details |
| about how each method works, as well as configuration properties specific to that method, check out its documentation |
| page.</p> |
| <h3><a class="anchor" aria-hidden="true" id="streaming"></a><a href="#streaming" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Streaming</h3> |
| <p>The most recommended, and most popular, method of streaming ingestion is the |
| <a href="/docs/0.23.0/development/extensions-core/kafka-ingestion.html">Kafka indexing service</a> that reads directly from Kafka. Alternatively, the Kinesis |
| indexing service works with Amazon Kinesis Data Streams.</p> |
| <p>Streaming ingestion uses an ongoing process called a supervisor that reads from the data stream to ingest data into Druid.</p> |
| <p>This table compares the options:</p> |
| <table> |
| <thead> |
| <tr><th><strong>Method</strong></th><th><a href="/docs/0.23.0/development/extensions-core/kafka-ingestion.html">Kafka</a></th><th><a href="/docs/0.23.0/development/extensions-core/kinesis-ingestion.html">Kinesis</a></th></tr> |
| </thead> |
| <tbody> |
| <tr><td><strong>Supervisor type</strong></td><td><code>kafka</code></td><td><code>kinesis</code></td></tr> |
| <tr><td><strong>How it works</strong></td><td>Druid reads directly from Apache Kafka.</td><td>Druid reads directly from Amazon Kinesis.</td></tr> |
| <tr><td><strong>Can ingest late data?</strong></td><td>Yes</td><td>Yes</td></tr> |
| <tr><td><strong>Exactly-once guarantees?</strong></td><td>Yes</td><td>Yes</td></tr> |
| </tbody> |
| </table> |
| <h3><a class="anchor" aria-hidden="true" id="batch"></a><a href="#batch" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Batch</h3> |
| <p>When doing batch loads from files, you should use one-time <a href="/docs/0.23.0/ingestion/tasks.html">tasks</a>, and you have three options: <code>index_parallel</code> (native batch; parallel), <code>index_hadoop</code> (Hadoop-based), |
| or <code>index</code> (native batch; single-task).</p> |
| <p>In general, we recommend native batch whenever it meets your needs, since the setup is simpler (it does not depend on |
| an external Hadoop cluster). However, there are still scenarios where Hadoop-based batch ingestion might be a better choice, |
| for example when you already have a running Hadoop cluster and want to |
| use the cluster resource of the existing cluster for batch ingestion.</p> |
| <p>This table compares the three available options:</p> |
| <table> |
| <thead> |
| <tr><th><strong>Method</strong></th><th><a href="/docs/0.23.0/ingestion/native-batch.html">Native batch (parallel)</a></th><th><a href="/docs/0.23.0/ingestion/hadoop.html">Hadoop-based</a></th><th><a href="/docs/0.23.0/ingestion/native-batch-simple-task.html">Native batch (simple)</a></th></tr> |
| </thead> |
| <tbody> |
| <tr><td><strong>Task type</strong></td><td><code>index_parallel</code></td><td><code>index_hadoop</code></td><td><code>index</code></td></tr> |
| <tr><td><strong>Parallel?</strong></td><td>Yes, if <code>inputFormat</code> is splittable and <code>maxNumConcurrentSubTasks</code> > 1 in <code>tuningConfig</code>. See <a href="/docs/0.23.0/ingestion/data-formats.html">data format documentation</a> for details.</td><td>Yes, always.</td><td>No. Each task is single-threaded.</td></tr> |
| <tr><td><strong>Can append or overwrite?</strong></td><td>Yes, both.</td><td>Overwrite only.</td><td>Yes, both.</td></tr> |
| <tr><td><strong>External dependencies</strong></td><td>None.</td><td>Hadoop cluster (Druid submits Map/Reduce jobs).</td><td>None.</td></tr> |
| <tr><td><strong>Input locations</strong></td><td>Any <a href="/docs/0.23.0/ingestion/native-batch-input-sources.html"><code>inputSource</code></a>.</td><td>Any Hadoop FileSystem or Druid datasource.</td><td>Any <a href="/docs/0.23.0/ingestion/native-batch-input-sources.html"><code>inputSource</code></a>.</td></tr> |
| <tr><td><strong>File formats</strong></td><td>Any <a href="/docs/0.23.0/ingestion/data-formats.html#input-format"><code>inputFormat</code></a>.</td><td>Any Hadoop InputFormat.</td><td>Any <a href="/docs/0.23.0/ingestion/data-formats.html#input-format"><code>inputFormat</code></a>.</td></tr> |
| <tr><td><strong><a href="/docs/0.23.0/ingestion/rollup.html">Rollup modes</a></strong></td><td>Perfect if <code>forceGuaranteedRollup</code> = true in the <a href="/docs/0.23.0/ingestion/native-batch.html#tuningconfig"><code>tuningConfig</code></a>.</td><td>Always perfect.</td><td>Perfect if <code>forceGuaranteedRollup</code> = true in the <a href="/docs/0.23.0/ingestion/native-batch.html#tuningconfig"><code>tuningConfig</code></a>.</td></tr> |
| <tr><td><strong>Partitioning options</strong></td><td>Dynamic, hash-based, and range-based partitioning methods are available. See <a href="/docs/0.23.0/ingestion/native-batch.html#partitionsspec">partitionsSpec</a> for details.</td><td>Hash-based or range-based partitioning via <a href="/docs/0.23.0/ingestion/hadoop.html#partitionsspec"><code>partitionsSpec</code></a>.</td><td>Dynamic and hash-based partitioning methods are available. See <a href="/docs/0.23.0/ingestion/native-batch.html#partitionsspec">partitionsSpec</a> for details.</td></tr> |
| </tbody> |
| </table> |
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