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>.NET/C#</a>
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<a href="/docs/2.9.1/logging"
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<li>
<a href="/docs/2.9.1/starting-nodes" class='' >Starting and Stopping Nodes</a>
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<a href="/docs/2.9.1/clustering/clustering"
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<a href="/docs/2.9.1/clustering/zookeeper-discovery"
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>ZooKeeper Discovery</a>
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<li>
<a href="/docs/2.9.1/clustering/discovery-in-the-cloud"
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>Discovery in the Cloud</a>
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<a href="/docs/2.9.1/clustering/network-configuration"
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>Network Configuration</a>
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<a href="/docs/2.9.1/clustering/connect-client-nodes"
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>Connecting Client Nodes</a>
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<a href="/docs/2.9.1/clustering/baseline-topology"
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>Baseline Topology</a>
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<a href="/docs/2.9.1/thin-clients/dotnet-thin-client"
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>.NET Thin Client</a>
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<a href="/docs/2.9.1/thin-clients/cpp-thin-client"
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>C++ Thin Client</a>
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<a href="/docs/2.9.1/thin-clients/python-thin-client"
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>Python Thin Client</a>
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<a href="/docs/2.9.1/thin-clients/php-thin-client"
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>PHP Thin Client</a>
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<a href="/docs/2.9.1/thin-clients/nodejs-thin-client"
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>Node.js Thin Client</a>
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<li><a href="/docs/2.9.1/binary-client-protocol/key-value-queries" class=''>Key-Value Queries</a></li>
<li><a href="/docs/2.9.1/binary-client-protocol/sql-and-scan-queries" class=''>SQL and Scan Queries</a></li>
<li><a href="/docs/2.9.1/binary-client-protocol/binary-type-metadata" class=''>Binary Types Metadata</a></li>
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<li>
<a href="/docs/2.9.1/data-modeling/data-modeling"
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<a href="/docs/2.9.1/data-modeling/data-partitioning"
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>Data Partitioning</a>
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<li>
<a href="/docs/2.9.1/data-modeling/affinity-collocation"
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>Affinity Colocation</a>
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<li>
<a href="/docs/2.9.1/data-modeling/binary-marshaller"
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<button type='button' class='group-toggle collapsed '>Configuring Memory<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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<a href="/docs/2.9.1/memory-architecture"
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<li>
<a href="/docs/2.9.1/memory-configuration/data-regions"
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>Configuring Data Regions</a>
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<li>
<a href="/docs/2.9.1/memory-configuration/eviction-policies"
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>Eviction Policies</a>
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<li>
<button type='button' class='group-toggle collapsed '>Configuring Persistence<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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<li>
<a href="/docs/2.9.1/persistence/native-persistence"
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<li>
<a href="/docs/2.9.1/persistence/external-storage"
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>External Storage</a>
</li>
<li>
<a href="/docs/2.9.1/persistence/swap"
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>Swapping</a>
</li>
<li>
<a href="/docs/2.9.1/persistence/custom-cache-store"
class=''
>Implementing Custom Cache Store</a>
</li>
<li>
<a href="/docs/2.9.1/persistence/snapshots"
class=''
>Cluster Snapshots</a>
</li>
<li>
<a href="/docs/2.9.1/persistence/disk-compression"
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>Disk Compression</a>
</li>
<li>
<a href="/docs/2.9.1/persistence/persistence-tuning"
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<li>
<button type='button' class='group-toggle collapsed '>Configuring Caches<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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<li>
<a href="/docs/2.9.1/configuring-caches/configuration-overview"
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>Cache Configuration</a>
</li>
<li>
<a href="/docs/2.9.1/configuring-caches/configuring-backups"
class=''
>Configuring Partition Backups</a>
</li>
<li>
<a href="/docs/2.9.1/configuring-caches/partition-loss-policy"
class=''
>Partition Loss Policy</a>
</li>
<li>
<a href="/docs/2.9.1/configuring-caches/atomicity-modes"
class=''
>Atomicity Modes</a>
</li>
<li>
<a href="/docs/2.9.1/configuring-caches/expiry-policies"
class=''
>Expiry Policy</a>
</li>
<li>
<a href="/docs/2.9.1/configuring-caches/on-heap-caching"
class=''
>On-Heap Caching</a>
</li>
<li>
<a href="/docs/2.9.1/configuring-caches/cache-groups"
class=''
>Cache Groups</a>
</li>
<li>
<a href="/docs/2.9.1/configuring-caches/near-cache"
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</li>
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</li>
<li>
<a href="/docs/2.9.1/data-rebalancing" class='' >Data Rebalancing</a>
</li>
<li>
<a href="/docs/2.9.1/data-streaming" class='' >Data Streaming</a>
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<li>
<button type='button' class='group-toggle collapsed '>Using Key-Value API<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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<a href="/docs/2.9.1/key-value-api/basic-cache-operations"
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<a href="/docs/2.9.1/key-value-api/binary-objects"
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>Working with Binary Objects</a>
</li>
<li>
<a href="/docs/2.9.1/key-value-api/using-scan-queries"
class=''
>Using Scan Queries</a>
</li>
<li>
<a href="/docs/2.9.1/read-repair"
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>Read Repair</a>
</li>
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<li>
<a href="/docs/2.9.1/key-value-api/transactions" class='' >Performing Transactions</a>
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<li>
<button type='button' class='group-toggle collapsed '>Working with SQL<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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<li>
<a href="/docs/2.9.1/SQL/sql-introduction"
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<li>
<a href="/docs/2.9.1/SQL/schemas"
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>Understanding Schemas</a>
</li>
<li>
<a href="/docs/2.9.1/SQL/indexes"
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>Defining Indexes</a>
</li>
<li>
<a href="/docs/2.9.1/SQL/sql-api"
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</li>
<li>
<a href="/docs/2.9.1/SQL/distributed-joins"
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>Distributed Joins</a>
</li>
<li>
<a href="/docs/2.9.1/SQL/sql-transactions"
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<a href="/docs/2.9.1/SQL/custom-sql-func"
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<li>
<a href="/docs/2.9.1/SQL/JDBC/jdbc-driver"
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>JDBC Driver</a>
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<a href="/docs/2.9.1/SQL/JDBC/jdbc-client-driver"
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>JDBC Client Driver</a>
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<li><a href="/docs/2.9.1/SQL/ODBC/querying-modifying-data" class=''>Querying and Modifying Data</a></li>
<li><a href="/docs/2.9.1/SQL/ODBC/specification" class=''>Specification</a></li>
<li><a href="/docs/2.9.1/SQL/ODBC/data-types" class=''>Data Types</a></li>
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<a href="/docs/2.9.1/transactions/mvcc"
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<a href="/docs/2.9.1/sql-reference/sql-conformance"
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<li>
<a href="/docs/2.9.1/sql-reference/ddl"
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>Data Definition Language (DDL)</a>
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<li>
<a href="/docs/2.9.1/sql-reference/dml"
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>Data Manipulation Language (DML)</a>
</li>
<li>
<a href="/docs/2.9.1/sql-reference/transactions"
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>Transactions</a>
</li>
<li>
<a href="/docs/2.9.1/sql-reference/operational-commands"
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>Operational Commands</a>
</li>
<li>
<a href="/docs/2.9.1/sql-reference/aggregate-functions"
class=''
>Aggregate functions</a>
</li>
<li>
<a href="/docs/2.9.1/sql-reference/numeric-functions"
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>Numeric Functions</a>
</li>
<li>
<a href="/docs/2.9.1/sql-reference/string-functions"
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>String Functions</a>
</li>
<li>
<a href="/docs/2.9.1/sql-reference/date-time-functions"
class=''
>Data and Time Functions</a>
</li>
<li>
<a href="/docs/2.9.1/sql-reference/system-functions"
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>System Functions</a>
</li>
<li>
<a href="/docs/2.9.1/sql-reference/data-types"
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>Data Types</a>
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<li>
<a href="/docs/2.9.1/distributed-computing/distributed-computing"
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>Distributed Computing API</a>
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<li>
<a href="/docs/2.9.1/distributed-computing/cluster-groups"
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>Cluster Groups</a>
</li>
<li>
<a href="/docs/2.9.1/distributed-computing/executor-service"
class=''
>Executor Service</a>
</li>
<li>
<a href="/docs/2.9.1/distributed-computing/map-reduce"
class=''
>MapReduce API</a>
</li>
<li>
<a href="/docs/2.9.1/distributed-computing/load-balancing"
class=''
>Load Balancing</a>
</li>
<li>
<a href="/docs/2.9.1/distributed-computing/fault-tolerance"
class=''
>Fault Tolerance</a>
</li>
<li>
<a href="/docs/2.9.1/distributed-computing/job-scheduling"
class=''
>Job Scheduling</a>
</li>
<li>
<a href="/docs/2.9.1/distributed-computing/collocated-computations"
class=''
>Colocating Computations with Data</a>
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<li>
<button type='button' class='group-toggle collapsed '>Code Deployment<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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<li>
<a href="/docs/2.9.1/code-deployment/deploying-user-code"
class=''
>Deploying User Code</a>
</li>
<li>
<a href="/docs/2.9.1/code-deployment/peer-class-loading"
class=''
>Peer Class Loading</a>
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<li>
<button type='button' class='group-toggle collapsed '>Machine Learning<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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<li>
<a href="/docs/2.9.1/machine-learning/machine-learning"
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>Machine Learning</a>
</li>
<li>
<a href="/docs/2.9.1/machine-learning/partition-based-dataset"
class=''
>Partition Based Dataset</a>
</li>
<li>
<a href="/docs/2.9.1/machine-learning/updating-trained-models"
class=''
>Updating Trained Models</a>
</li>
<li>
<button
type='button'
class='collapsed '>Binary Classification<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.9.1/machine-learning/binary-classification/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.9.1/machine-learning/binary-classification/linear-svm" class=''>Linear SVM (Support Vector Machine)</a></li>
<li><a href="/docs/2.9.1/machine-learning/binary-classification/decision-trees" class=''>Decision Trees</a></li>
<li><a href="/docs/2.9.1/machine-learning/binary-classification/multilayer-perceptron" class=''>Multilayer Perceptron</a></li>
<li><a href="/docs/2.9.1/machine-learning/binary-classification/logistic-regression" class=''>Logistic Regression</a></li>
<li><a href="/docs/2.9.1/machine-learning/binary-classification/knn-classification" class=''>k-NN Classification</a></li>
<li><a href="/docs/2.9.1/machine-learning/binary-classification/ann" class=''>ANN (Approximate Nearest Neighbor)</a></li>
<li><a href="/docs/2.9.1/machine-learning/binary-classification/naive-bayes" class=''>Naive Bayes</a></li>
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</li>
<li>
<button
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class='collapsed '>Regression<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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<li><a href="/docs/2.9.1/machine-learning/regression/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.9.1/machine-learning/regression/linear-regression" class=''>Linear Regression</a></li>
<li><a href="/docs/2.9.1/machine-learning/regression/decision-trees-regression" class=''>Decision Trees Regression</a></li>
<li><a href="/docs/2.9.1/machine-learning/regression/knn-regression" class=''>k-NN Regression</a></li>
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</li>
<li>
<button
type='button'
class='collapsed '>Clustering<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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<li><a href="/docs/2.9.1/machine-learning/clustering/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.9.1/machine-learning/clustering/k-means-clustering" class=''>K-Means Clustering</a></li>
<li><a href="/docs/2.9.1/machine-learning/clustering/gaussian-mixture" class=''>Gaussian mixture (GMM)</a></li>
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</li>
<li>
<a href="/docs/2.9.1/machine-learning/preprocessing"
class=''
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</li>
<li>
<button
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<li><a href="/docs/2.9.1/machine-learning/model-selection/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.9.1/machine-learning/model-selection/evaluator" class=''>Evaluator</a></li>
<li><a href="/docs/2.9.1/machine-learning/model-selection/split-the-dataset-on-test-and-train-datasets" class=''>Split the dataset on test and train datasets</a></li>
<li><a href="/docs/2.9.1/machine-learning/model-selection/hyper-parameter-tuning" class=''>Hyper-parameter tuning</a></li>
<li><a href="/docs/2.9.1/machine-learning/model-selection/pipeline-api" class=''>Pipeline API</a></li>
</nav>
</li>
<li>
<a href="/docs/2.9.1/machine-learning/multiclass-classification"
class=''
>Multiclass Classification</a>
</li>
<li>
<button
type='button'
class='collapsed '>Ensemble Methods<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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<li><a href="/docs/2.9.1/machine-learning/ensemble-methods/introduction" class=''></a></li>
<li><a href="/docs/2.9.1/machine-learning/ensemble-methods/stacking" class=''>Stacking</a></li>
<li><a href="/docs/2.9.1/machine-learning/ensemble-methods/baggin" class=''>Bagging</a></li>
<li><a href="/docs/2.9.1/machine-learning/ensemble-methods/random-forest" class=''>Random Forest</a></li>
<li><a href="/docs/2.9.1/machine-learning/ensemble-methods/gradient-boosting" class=''>Gradient Boosting</a></li>
</nav>
</li>
<li>
<a href="/docs/2.9.1/machine-learning/recommendation-systems"
class=''
>Recommendation Systems</a>
</li>
<li>
<button
type='button'
class='collapsed '>Importing Model<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.9.1/machine-learning/importing-model/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.9.1/machine-learning/importing-model/model-import-from-gxboost" class=''>Import Model from XGBoost</a></li>
<li><a href="/docs/2.9.1/machine-learning/importing-model/model-import-from-apache-spark" class=''>Import Model from Apache Spark</a></li>
</nav>
</li>
</nav>
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<article data-swiftype-index='true'>
<a class='edit-link' href="https://github.com/apache/ignite/tree/IGNITE-7595/docs/_docs/extensions-and-integrations/ignite-for-spark/ignitecontext-and-rdd.adoc" target="_blank">Edit</a>
<h1>IgniteContext and IgniteRDD</h1>
<div class="sect1">
<h2 id="ignitecontext">IgniteContext</h2>
<div class="sectionbody">
<div class="paragraph">
<p>IgniteContext is the main entry point to Spark-Ignite integration. To create an instance of Ignite context, user must provide an instance of SparkContext and a closure creating <code>IgniteConfiguration</code> (configuration factory). Ignite context will make sure that server or client Ignite nodes exist in all involved job instances. Alternatively, a path to an XML configuration file can be passed to <code>IgniteContext</code> constructor which will be used to configure nodes being started.</p>
</div>
<div class="paragraph">
<p>When creating an <code>IgniteContext</code> instance, an optional boolean <code>client</code> argument (defaulting to <code>true</code>) can be passed to context constructor. This is typically used in a Shared Deployment installation. When <code>client</code> is set to <code>false</code>, context will operate in embedded mode and will start server nodes on all workers during the context construction. This is required in an Embedded Deployment installation. See <a href="/docs/2.9.1/ignite-for-spark/installation">Installation</a> for information on deployment configurations.</p>
</div>
<div class="admonitionblock caution">
<table>
<tr>
<td class="icon">
<div class="title">Caution</div>
</td>
<td class="content">
<h3 id="embedded-mode-deprecation" class="discrete">Embedded Mode Deprecation</h3>
<div class="paragraph">
<p>Embedded mode implies starting Ignite server nodes within Spark executors which can cause unexpected rebalancing or even data loss. Therefore this mode is currently deprecated and will be eventually discontinued. Consider starting a separate Ignite cluster and using standalone mode to avoid data consistency and performance issues.</p>
</div>
</td>
</tr>
</table>
</div>
<div class="paragraph">
<p>Once <code>IgniteContext</code> is created, instances of <code>IgniteRDD</code> may be obtained using <code>fromCache</code> methods. It is not required that requested cache exist in Ignite cluster when RDD is created. If the cache with the given name does not exist, it will be created using provided configuration or template configuration.</p>
</div>
<div class="paragraph">
<p>For example, the following code will create an Ignite context with default Ignite configuration</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="scala"><span class="k">val</span> <span class="nv">igniteContext</spa