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                                                                WHERE country.code IN ('USA','BRA','ESP','JPN')
                                                                GROUP BY country.name, city.name
                                                                ORDER BY max_pop DESC LIMIT 3;
                                                            </code>
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                                                                &lt;bean class="org.apache.ignite.configuration.IgniteConfiguration"&gt;
                                                                    &lt;property name="dataStorageConfiguration"&gt;
                                                                        &lt;bean class="org.apache.ignite.configuration.DataStorageConfiguration"&gt;
                                                                            &lt;property name="defaultDataRegionConfiguration"&gt;
                                                                                &lt;bean class="org.apache.ignite.configuration.DataRegionConfiguration"&gt;
                                                                                    &lt;property name="persistenceEnabled" value="true"/&gt;
                                                                                &lt;/bean&gt;
                                                                            &lt;/property&gt;
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                                                                IgniteConfiguration cfg = new IgniteConfiguration();

                                                                DataStorageConfiguration storageCfg = new DataStorageConfiguration();

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                                                                storageCfg.getDefaultDataRegionConfiguration().setPersistenceEnabled(true);

                                                                // Using the new storage configuration
                                                                cfg.setDataStorageConfiguration(storageCfg);
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                                                                {
                                                                    DefaultDataRegionConfiguration = new DataRegionConfiguration
                                                                    {
                                                                        Name = "Default_Region",
                                                                        PersistenceEnabled = true
                                                                    }
                                                                }
                                                            };
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                                                            // Broadcast the task to server nodes only.
                                                            IgniteCompute compute = ignite.compute(ignite.cluster().forServers());

                                                            // Each remote server node will execute the logic of the task/lambda below.
                                                            compute.broadcast(() -> System.out.println(
                                                                "Hello Node: " + ignite.cluster().localNode().id()));
                                                            </code>
                                                        </pre>
                                                </div>
                                                <div class="tab-pane" id="compute-csharp">
                                                        <pre class="language-csharp">
                                                            <code>
                                                            // Broadcast the task to server nodes only.
                                                            var compute = ignite.GetCluster().ForServers().GetCompute();

                                                            // Each remote server node will execute the custom PrintNodeIdAction task.
                                                            compute.Broadcast(new PrintNodeIdAction());
                                                            </code>
                                                        </pre>
                                                </div>

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                                        <a href="/docs/latest/distributed-computing/distributed-computing"
                                           onclick="gtag('event',  'homepage_click', {'event_category':'apache_ignite_features', 'event_label': 'co_located_processsing'});"
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                                        <span class="d-block">ACID Transactions</span>
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                                        <p>
                                            Ignite can operate in a strongly consistent mode that provides full support
                                            for distributed ACID transactions. Transact across multiple cluster nodes,
                                            caches, tables, and partitions:
                                        </p>

                                        <div class="code-tabs">
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                                                        <pre class="language-java">
                                                            <code>
                                                                IgniteTransactions transactions = ignite.transactions();

                                                                try (Transaction tx = transactions.txStart()) {
                                                                    Integer hello = cache.get("Hello");

                                                                    if (hello == 1)
                                                                        cache.put("Hello", 11);

                                                                    cache.put("World", 22);

                                                                    tx.commit();
                                                                }
                                                            </code>
                                                        </pre>
                                                </div>
                                                <div class="tab-pane" id="transactions-csharp">
                                                        <pre class="language-csharp">
                                                            <code>
                                                                var transactions = ignite.GetTransactions();

                                                                using (var tx = transactions.TxStart()) {
                                                                    int hello = cache.Get("Hello");

                                                                    if (hello == 1) {
                                                                        cache.Put("Hello", 11);
                                                                    }

                                                                    cache.Put("World", 22);

                                                                    tx.Commit();
                                                                }
                                                            </code>
                                                        </pre>
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                                        <p>
                                            Ignite machine learning uses built-in algorithms and tools, as well as
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                                            models and avoid costly data transfers. Train, deploy, evaluate, and update
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                                                        <pre class="language-java">
                                                            <code>
                                                            // Create the trainer
                                                            KNNClassificationTrainer trainer = new KNNClassificationTrainer()
                                                            .withK(3).withIdxType(SpatialIndexType.BALL_TREE)
                                                            .withDistanceMeasure(new EuclideanDistance())
                                                            .withWeighted(true);

                                                            // Train the model
                                                            KNNClassificationModel knnMdl = trainer.fit(ignite, dataCache, vectorizer);

                                                            // Make a prediction
                                                            double prediction = knnMdl.predict(observation);
                                                            </code>
                                                        </pre>
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                                        <span class="d-block">Continuous Queries</span>
                                    </a></h3>
                                </div>
                                <div id="feat-vtab-cb-conquery" class="collapse" data-parent="#v-pills-tabContent"
                                     role="tabpanel" aria-labelledby="feat-vtab-ch-conquery">
                                    <div class="card-body">
                                        <p>
                                            With relational databases, you use triggers to react to certain events.
                                            With Ignite, you deploy continuous queries that are written in a modern
                                            programming language such as Java or C# and process streams of changes on
                                            the database and application side:
                                        </p>

                                        <div class="code-tabs">
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                                                <div class="tab-pane active" id="conquery-java">
                                                        <pre class="language-java">
                                                            <code>
                                                            ContinuousQuery<Integer, String> qry = new ContinuousQuery<>();

                                                            // The callback that will be triggered on the application side.
                                                            qry.setLocalListener(new MyLocalListener());

                                                            // The callback that will be executed on the server side.
                                                            qry.setRemoteFilterFactory(new MyRemoteFilterFactory());

                                                            // Deploy the query in the cluster.
                                                            cache.query(query);
                                                            </code>
                                                        </pre>
                                                </div>
                                                <div class="tab-pane" id="conquery-csharp">
                                                        <pre class="language-csharp">
                                                            <code>
                                                            var cache = ignite.GetOrCreateCache<int, string>("myCache");

                                                            var query = new ContinuousQuery<int, string>(
                                                                new MyLocalListener(), // Will be triggered on the application side.
                                                                new MyRemoteFilter()); // Will be executed on the server side.

                                                            // Deploy the query in the cluster.
                                                            var handle = cache.QueryContinuous(query);
                                                            </code>
                                                        </pre>
                                                </div>
                                            </div>
                                        </div>

                                        <a href="/docs/latest/key-value-api/continuous-queries"
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                                           title="Apache Ignite Continuous Queries"
                                           aria-label="Apache Ignite Continuous Queries"
                                           class="btn btn-secondary">Start Using Continuous Queries</a>
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                    <p>
                        Accelerate your existing applications by 100x using Ignite as an in-memory cache or in-memory
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                    </p>

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