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    <title>Apache Ignite and NoSQL</title>
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    <main id="main" role="main" class="container">
        <section id="sql-queries" class="page-section">
            <h1 class="first">Ignite for NoSQL Users</h1>
            <div style="padding:0 0 20px 0;">
                <p>
                    Apache Ignite as many other NoSQL databases is horizontally scalable, highly available and
                    fault-tolerant. Ignite acts as a distributed partitioned hash map making sure that every cluster
                    node owns a portion of the overall data set. This way the more cluster nodes you add, the more data
                    you can store in the cluster.
                </p>
                <p>
                    Ignite can either partition or replicate the data. Unlike <code>REPLICATED</code> mode, where data is
                    fully replicated across all nodes in the cluster, in <code>PARTITIONED</code> mode Ignite will
                    equally split the data across multiple cluster nodes, allowing for storing TBs of data both in
                    <i>memory</i> and on <i>disk</i>.
                </p>
            </div>

            <section id="comparison-matrix-section" class="page-section" style="border: none">
                <table class="comparison-matrix" name="comparison-matrix">
                    <thead>
                    <tr><th>Feature</th><th>NoSQL</th><th>Ignite</th></tr>
                    </thead>
                    <tbody>
                    <tr>
                        <td>Scalability</td>
                        <td><span class="check-mark">&#x2713;</span> horizontal</td>
                        <td class="highlight-ignite-comparison"><span class="check-mark">&#x2713;</span> horizontal</b></td>
                    </tr>
                    <tr>
                        <td>Availability</td>
                        <td><span class="check-mark">&#x2713;</span> high</td>
                        <td class="highlight-ignite-comparison"><span class="check-mark">&#x2713;</span> high</b></td>
                    </tr>
                    <tr>
                        <td>Consistency</td>
                        <td><span class="cross-mark">&#x2717;</span> eventual</td>
                        <td class="highlight-ignite-comparison"><span class="check-mark">&#x2713;</span> strong</b></td>
                    </tr>
                    <tr>
                        <td>In-Memory</td>
                        <td><span class="cross-mark">&#x2717;</span></td>
                        <td class="highlight-ignite-comparison"><span class="check-mark">&#x2713;</span> in-memory store</b></td>
                    </tr>
                    <tr>
                        <td>Persistence</td>
                        <td><span class="check-mark">&#x2713;</span></td>
                        <td class="highlight-ignite-comparison"><span class="check-mark">&#x2713;</span></b></td>
                    </tr>
                    <tr>
                        <td>SQL</td>
                        <td><span class="cross-mark">&#x2717;</span></td>
                        <td class="highlight-ignite-comparison"><span class="check-mark">&#x2713;</span></b></td>
                    </tr>
                    <tr>
                        <td>Key-Value</td>
                        <td><span class="check-mark">&#x2713;</span></td>
                        <td class="highlight-ignite-comparison"><span class="check-mark">&#x2713;</span></b></td>
                    </tr>
                    <tr>
                        <td>Collocated Processing</td>
                        <td><span class="cross-mark">&#x2717;</span></td>
                        <td class="highlight-ignite-comparison"><span class="check-mark">&#x2713;</span></b></td>
                    </tr>
                    </tbody>
                </table>

                <table class="comparison-matrix-mobile" name="comparison-matrix-sm">
                    <thead>
                    <tr><th>Scalability</th></tr>
                    </thead>
                    <tbody>
                    <tr><td><span class="left">NoSQL</span><span class="right"><span class="check-mark">&#x2713;</span> horizontal</span></td></tr>
                    <tr class="ignite"><td><span class="left"><b>Ignite</b></span><span class="right"><span class="check-mark">&#x2713;</span> <b>horizontal</b></span></td></tr>
                    </tbody>
                    <thead>
                    <tr><th>Availability</th></tr>
                    </thead>
                    <tbody>
                    <tr><td><span class="left">NoSQL</span><span class="right"><span class="check-mark">&#x2713;</span> high</span></td></tr>
                    <tr class="ignite"><td><span class="left"><b>Ignite</b></span><span class="right"><span class="check-mark">&#x2713;</span> <b>high</b></span></td></tr>
                    </tbody>
                    <thead>
                    <tr><th>Consistency</th></tr>
                    </thead>
                    <tbody>
                    <tr><td><span class="left">NoSQL</span><span class="right"><span class="cross-mark">&#x2717;</span> eventual</span></td></tr>
                    <tr class="ignite"><td><span class="left"><b>Ignite</b></span><span class="right"><span class="check-mark">&#x2713;</span> <b>strong</b></span></td></tr>
                    </tbody>
                    <thead>
                    <tr><th>In-Memory</th></tr>
                    </thead>
                    <tbody>
                    <tr><td><span class="left">NoSQL</span><span class="right"><span class="cross-mark">&#x2717;</span></span></td></tr>
                    <tr class="ignite"><td><span class="left"><b>Ignite</b></span><span class="right"><span class="check-mark">&#x2713;</span> <b>in-memory store</b></span></td></tr>
                    </tbody>
                    <thead>
                    <tr><th>Persistence</th></tr>
                    </thead>
                    <tbody>
                    <tr><td><span class="left">NoSQL</span><span class="right"><span class="check-mark">&#x2713;</span></span></td></tr>
                    <tr class="ignite"><td><span class="left"><b>Ignite</b></span><span class="right"><span class="check-mark">&#x2713;</span></span></td></tr>
                    </tbody>
                    <thead>
                    <tr><th>SQL</th></tr>
                    </thead>
                    <tbody>
                    <tr><td><span class="left">NoSQL</span><span class="right"><span class="cross-mark">&#x2717;</span></span></td></tr>
                    <tr class="ignite"><td><span class="left"><b>Ignite</b></span><span class="right"><span class="check-mark">&#x2713;</span></span></td></tr>
                    </tbody>
                    <thead>
                    <tr><th>Key-Value</th></tr>
                    </thead>
                    <tbody>
                    <tr><td><span class="left">NoSQL</span><span class="right"><span class="check-mark">&#x2713;</span></span></td></tr>
                    <tr class="ignite"><td><span class="left"><b>Ignite</b></span><span class="right"><span class="check-mark">&#x2713;</span></span></td></tr>
                    </tbody>
                    <thead>
                    <tr><th>Collocated-Processing</th></tr>
                    </thead>
                    <tbody>
                    <tr><td><span class="left">NoSQL</span><span class="right"><span class="cross-mark">&#x2717;</span></span></td></tr>
                    <tr class="ignite"><td><span class="left"><b>Ignite</b></span><span class="right"><span class="check-mark">&#x2713;</span></span></td></tr>
                    </tbody>
                </table>
            </section>

            <p>
                Unlike eventually consistent NoSQL databases, Ignite can operate in a <i>strongly consistent</i> mode,
                guaranteeing the data consistency across all cluster nodes. In addition, ignte supports
                <a href="https://apacheignite.readme.io/docs/transactions">ACID transactions</a> that can span
                multiple keys acrsoss multiple cluster ndoes and partitions.
            </p>

            <p>
                The other difference between Ignite and NoSQL databases is that, first, the memory is
                treated as a fully functional storage, not just as a caching layer, like most databases do. Second,
                in addition to
                <a href="/features/datagrid.html">key-value</a> APIs, Ignite supports
                <a href="/features/sql.html">distributed SQL</a> and
                <a href="/features/collocatedprocessing.html">collocated processing</a> approach.
            </p>
        </section>
    </main>

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