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    <title>Apache Ignite - HDFS Cache</title>
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        <section id="hdfs-cache" class="page-section">
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                    <h2 class="first">In-Memory File System as HDFS Cache</h2>
                    <p>
                        Ignite File System (IGFS) is a plug-and-play in-memory file system,
                        compatible with Hadoop Distributed File System (HDFS) and In-Memory Map Reduce.
                    </p>
                    <div class="page-heading">Dual Mode</div>
                    <p>
                        IGFS supports dual-mode that allows it to work as either a standalone file system in Hadoop cluster,
                        or work in tandem with HDFS, providing a primary caching layer for the secondary HDFS.
                        As a caching layer it provides highly configurable <em>read-through</em> and <em>write-through</em> behaviour.
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            <div class="page-heading">Write-Through & Read-Through</div>
            <p>
                Ignite In-Memory File System can be configured with a Hadoop native <code>Secondary File System</code>.
                Such implementation allows for <em>read-through</em> and <em>write-through</em> behavior over any
                other Hadoop FileSystem implementation (e.g. HDFS).
            </p>
            <p>
                This allows IGFS serve as an in-memory caching layer over disk-based HDFS or any other
                Hadoop-compliant file system.
            </p>
            <p>
                <a href="https://apacheignite-fs.readme.io/docs/secondary-file-system" target="docs">
                    <b>Configure HDFS Cache <i class="fa fa-angle-double-right"></i></b>
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