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<a href="/docs/latest/persistence/snapshot-directory"
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<a href="/docs/latest/persistence/disk-compression"
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<a href="/docs/latest/persistence/persistence-tuning"
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<a href="/docs/latest/persistence/change-data-capture"
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<a href="/docs/latest/snapshots/snapshots" class='' >Cluster Snapshots</a>
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<a href="/docs/latest/configuring-caches/near-cache"
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<li>
<a href="/docs/latest/data-rebalancing" class='' >Data Rebalancing</a>
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<a href="/docs/latest/data-streaming" class='' >Data Streaming</a>
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<a href="/docs/latest/read-repair"
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<a href="/docs/latest/key-value-api/transactions" class='' >Performing Transactions</a>
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<li><a href="/docs/latest/machine-learning/binary-classification/introduction" class=''>Introduction</a></li>
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<li><a href="/docs/latest/machine-learning/binary-classification/decision-trees" class=''>Decision Trees</a></li>
<li><a href="/docs/latest/machine-learning/binary-classification/multilayer-perceptron" class=''>Multilayer Perceptron</a></li>
<li><a href="/docs/latest/machine-learning/binary-classification/logistic-regression" class=''>Logistic Regression</a></li>
<li><a href="/docs/latest/machine-learning/binary-classification/knn-classification" class=''>k-NN Classification</a></li>
<li><a href="/docs/latest/machine-learning/binary-classification/ann" class=''>ANN (Approximate Nearest Neighbor)</a></li>
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<a href="/docs/latest/machine-learning/preprocessing"
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<li>
<a href="/docs/latest/machine-learning/multiclass-classification"
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<li><a href="/docs/latest/machine-learning/ensemble-methods/baggin" class=''>Bagging</a></li>
<li><a href="/docs/latest/machine-learning/ensemble-methods/random-forest" class=''>Random Forest</a></li>
<li><a href="/docs/latest/machine-learning/ensemble-methods/gradient-boosting" class=''>Gradient Boosting</a></li>
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<li>
<a href="/docs/latest/machine-learning/recommendation-systems"
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</li>
<li>
<a href="/docs/latest/key-value-api/continuous-queries" class='' >Using Continuous Queries</a>
</li>
<li>
<a href="/docs/latest/services/services" class='' >Using Ignite Services</a>
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<li>
<a href="/docs/latest/messaging" class='' >Using Ignite Messaging</a>
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<a href="/docs/latest/data-structures/atomic-types"
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<a href="/docs/latest/data-structures/countdownlatch"
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<li>
<a href="/docs/latest/data-structures/atomic-sequence"
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<a href="/docs/latest/data-structures/semaphore"
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<li>
<a href="/docs/latest/data-structures/id-generator"
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<li>
<a href="/docs/latest/distributed-locks" class='' >Distributed Locks</a>
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<article data-swiftype-index='true'>
<a class='edit-link' href="https://github.com/apache/ignite/tree/IGNITE-7595/docs/_docs/machine-learning/machine-learning.adoc" target="_blank">Edit</a>
<h1>Machine Learning</h1>
<div class="sect1">
<h2 id="overview">Overview</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Apache Ignite Machine Learning (ML) is a set of simple, scalable and efficient tools that allow the building of predictive Machine Learning models without costly data transfers.</p>
</div>
<div class="paragraph">
<p>The rationale for adding machine and deep learning (DL) to Apache Ignite is quite simple. Today&#8217;s data scientists have to deal with two major factors that keep ML from mainstream adoption:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>First, the models are trained and deployed (after the training is over) in different systems. The data scientists have to wait for ETL or some other data transfer process to move the data into a system like Apache Mahout or Apache Spark for a training purpose. Then they have to wait while this process completes and redeploy the models in a production environment. The whole process can take hours moving terabytes of data from one system to another. Moreover, the training part usually happens over the old data set.</p>
</li>
<li>
<p>The second factor is related to scalability. ML and DL algorithms that have to process data sets which no longer fit within a single server unit are constantly growing. This urges the data scientist to come up with sophisticated solutions o​r turn to distributed computing platforms such as Apache Spark and TensorFlow. However, those platforms mostly solve only a part of the puzzle which is the model training, making it a burden of the developers to decide how do deploy the models in production later.</p>
</li>
</ul>
</div>
<div class="imageblock">
<div class="content">
<img src="/docs/2.13.0/images/machine_learning.png" alt="machine learning">
</div>
</div>
<div class="sect2">
<h3 id="zero-etl-and-massive-scalability">Zero ETL and Massive Scalability</h3>
<div class="paragraph">
<p>Ignite Machine Learning relies on Ignite&#8217;s memory-centric storage that brings massive scalability for ML and DL tasks and eliminates the wait imposed by ETL between the different systems. For instance, it allows users to run ML/DL training and inference directly on data stored across memory and disk in an Ignite cluster. Next, Ignite provides a host of ML and DL algorithms that are optimized for Ignite&#8217;s collocated distributed processing. These implementations deliver in-memory speed and unlimited horizontal scalability when running in place against massive data sets or incrementally against incoming data streams, without requiring the data to be moved into another store. By eliminating the data movement and the long processing wait times, Ignite Machine learning enables continuous learning that can improve decisions based on the latest data as it arrives in real-time.</p>
</div>
</div>
<div class="sect2">
<h3 id="fault-tolerance-and-continuous-learning">Fault Tolerance and Continuous Learning</h3>
<div class="paragraph">
<p>Apache Ignite Machine Learning is tolerant to node failures. This means that in the case of node failures during the learning process, all recovery procedures will be transparent to the user, learning processes won&#8217;t be interrupted, and we will get results in the time similar to the case when all nodes work fine. For more information please see <a href="/docs/latest/machine-learning/partition-based-dataset">Partition Based Dataset</a>.</p>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="algorithms-and-applicability">Algorithms and Applicability</h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="classification">Classification</h3>
<div class="paragraph">
<p>Identifying to which category a new observation belongs, on the basis of a training set.</p>
</div>
<div class="paragraph">
<p><strong>Applicability:</strong> spam detection, image recognition, credit scoring, disease identification.</p>
</div>
<div class="paragraph">
<p><strong>Algorithms:</strong> <a href="/docs/latest/machine-learning/binary-classification/logistic-regression">Logistic Regression</a>, <a href="/docs/latest/machine-learning/binary-classification/linear-svm">Linear SVM (Support Vector Machine)</a>, <a href="/docs/latest/machine-learning/binary-classification/knn-classification">k-NN Classification</a>, <a href="/docs/latest/machine-learning/binary-classification/naive-bayes">Naive Bayes</a>, <a href="/docs/latest/machine-learning/binary-classification/decision-trees">Decision Trees</a>, <a href="/docs/latest/machine-learning/binary-classification/random-forest">Random Forest</a>, <a href="/docs/latest/machine-learning/binary-classification/multilayer-perceptron">Multilayer perceptron</a>, <a href="/docs/latest/machine-learning/ensemble-methods/gradient-boosting">Gradient Boosting</a>, <a href="/docs/latest/machine-learning/binary-classification/ann">ANN (Approximate Nearest Neighbor)</a>.</p>
</div>
</div>
<div class="sect2">
<h3 id="regression">Regression</h3>
<div class="paragraph">
<p>Modeling the relationship between a scalar dependent variable (y) and one or more explanatory variables or independent variables (x).</p>
</div>
<div class="paragraph">
<p><strong>Applicability:</strong> drug response, stock prices, supermarket revenue.</p>
</div>
<div class="paragraph">
<p><strong>Algorithms:</strong> Linear Regression, Decision Trees Regression, k-NN Regression.</p>
</div>
</div>
<div class="sect2">
<h3 id="clustering">Clustering</h3>
<div class="paragraph">
<p>Grouping a set of objects in such a way that objects in the same group (called a cluster) are more similar (in some sense) to each other than to those in other groups (clusters).</p>
</div>
<div class="paragraph">
<p><strong>Applicability:</strong> customer segmentation, grouping experiment outcomes, grouping of shopping items.</p>
</div>
<div class="paragraph">
<p><strong>Algorithms:</strong> K-Means Clustering, Gaussian mixture (GMM).</p>
</div>
</div>
<div class="sect2">
<h3 id="recommendation">Recommendation</h3>
<div class="paragraph">
<p>Building a recommendation system, which is a subclass of information filtering systems that seeks to predict the "rating" or "preference" a user would give to an item.</p>
</div>
<div class="paragraph">
<p><strong>Applicability:</strong> playlist generators for video and music services, product recommenders for services</p>
</div>
<div class="paragraph">
<p><strong>Algorithms:</strong> <a href="/docs/latest/machine-learning/recommendation-systems">Matrix Factorization</a>.</p>
</div>
</div>
<div class="sect2">
<h3 id="preprocessing">Preprocessing</h3>
<div class="paragraph">
<p>Feature extraction and normalization.</p>
</div>
<div class="paragraph">
<p><strong>Applicability:</strong> transform input data such as text for use with machine learning algorithms, to extract features we need to fit on, to normalize input data.</p>
</div>
<div class="paragraph">
<p><strong>Algorithms:</strong> Apache Ignite ML supports custom preprocessing using partition based dataset capabilities and has default <a href="/docs/latest/machine-learning/preprocessing">preprocessors</a> such as normalization preprocessor, one-hot-encoder, min-max scaler and so on.</p>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="getting-started">Getting Started</h2>
<div class="sectionbody">
<div class="paragraph">
<p>The fastest way to get started with the Machine Learning is to build and run existing examples, study their output and keep coding. The ML examples are located in the <a href="https://github.com/apache/ignite/tree/master/examples/src/main/java/org/apache/ignite/examples/ml">examples</a> folder of every Apache Ignite distribution.</p>
</div>
<div class="paragraph">
<p>Follow the steps below to try out the examples:</p>
</div>
<div class="olist arabic">
<ol class="arabic">
<li>
<p>Download Apache Ignite version 2.8 or later.</p>
</li>
<li>
<p>Open the <code>examples</code> project in an IDE, such as IntelliJ IDEA or Eclipse.</p>
</li>
<li>
<p>Go to the <code>src/main/java/org/apache/ignite/examples/ml</code> folder in the IDE and run an ML example.</p>
</li>
</ol>
</div>
<div class="paragraph">
<p>The examples do not require any special configuration. All ML examples will launch, run and stop successfully without any user intervention and provide meaningful output on the console. Additionally, the Tracer API example will launch a web browser and generate HTML output.</p>
</div>
<div class="sect2">
<h3 id="get-it-with-maven">Get it With Maven</h3>
<div class="paragraph">
<p>Add the Maven dependency below to your project in order to include the ML functionality provided by Ignite:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="xml"><span class="nt">&lt;dependency&gt;</span>
<span class="nt">&lt;groupId&gt;</span>org.apache.ignite<span class="nt">&lt;/groupId&gt;</span>
<span class="nt">&lt;artifactId&gt;</span>ignite-ml<span class="nt">&lt;/artifactId&gt;</span>
<span class="nt">&lt;version&gt;</span>${ignite.version}<span class="nt">&lt;/version&gt;</span>
<span class="nt">&lt;/dependency&gt;</span></code></pre>
</div>
</div>
<div class="paragraph">
<p>Replace <code>${ignite-version}</code> with an actual Ignite version.</p>
</div>
</div>
<div class="sect2">
<h3 id="build-from-sources">Build From Sources</h3>
<div class="paragraph">
<p>The latest Apache Ignite Machine Learning jar is always uploaded to the Maven repository. If you need to take the jar and deploy it in a custom environment, then it can be either downloaded from Maven or built from scratch. To build the Machine Learning component from sources:</p>
</div>
<div class="olist arabic">
<ol class="arabic">
<li>
<p>Download the latest Apache Ignite source release.</p>
</li>
<li>
<p>Clean the local Maven repository (this is to ensure that older Maven builds don’t impact the build).</p>
</li>
<li>
<p>Build and install Apache Ignite from the project&#8217;s root directory:</p>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="shell">./mvnw clean <span class="nb">install</span> <span class="nt">-DskipTests</span> <span class="nt">-Dmaven</span>.javadoc.skip<span class="o">=</span><span class="nb">true</span></code></pre>
</div>
</div>
</li>
<li>
<p>Locate the Machine Learning jar in your local Maven repository under the path <code>{user_dir}/.m2/repository/org/apache/ignite/ignite-ml/{ignite-version}/ignite-ml-{ignite-version}.jar</code>.</p>
</li>
<li>
<p>If you want to build ML or DL examples from sources, execute the following commands:</p>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="shell"><span class="nb">cd </span>examples
mvn clean package <span class="nt">-DskipTests</span></code></pre>
</div>
</div>
</li>
</ol>
</div>
<div class="paragraph">
<p>If needed, refer to <code>DEVNOTES.txt</code> in the project&#8217;s root folder and the <code>README</code> files in the <code>ignite-ml</code> component for more details.</p>
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<ul class="sectlevel1">
<li><a href="#overview">Overview</a>
<ul class="sectlevel2">
<li><a href="#zero-etl-and-massive-scalability">Zero ETL and Massive Scalability</a></li>
<li><a href="#fault-tolerance-and-continuous-learning">Fault Tolerance and Continuous Learning</a></li>
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<li><a href="#algorithms-and-applicability">Algorithms and Applicability</a>
<ul class="sectlevel2">
<li><a href="#classification">Classification</a></li>
<li><a href="#regression">Regression</a></li>
<li><a href="#clustering">Clustering</a></li>
<li><a href="#recommendation">Recommendation</a></li>
<li><a href="#preprocessing">Preprocessing</a></li>
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<li><a href="#getting-started">Getting Started</a>
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<li><a href="#get-it-with-maven">Get it With Maven</a></li>
<li><a href="#build-from-sources">Build From Sources</a></li>
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