en-US/multi_site_deployment.xml

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<section id="multi_site_deployment">
    <title>Multi-Site Deployment</title>
    <para>The &PRODUCT; platform scales well into multiple sites through the use of zones. The following diagram shows an example of a multi-site deployment.</para>
    <mediaobject>
        <imageobject>
            <imagedata fileref="./images/multi-site-deployment.png" />
        </imageobject>
        <textobject><phrase>Example Of A Multi-Site Deployment</phrase></textobject>
    </mediaobject>
    <para>Data Center 1 houses the primary Management Server as well as zone 1. The MySQL database is replicated in real time to the secondary Management Server installation in Data Center 2.</para>
    <mediaobject>
        <imageobject>
            <imagedata fileref="./images/separate-storage-network.png" />
        </imageobject>
        <textobject><phrase>Separate Storage Network</phrase></textobject>
    </mediaobject>
    <para>This diagram illustrates a setup with a separate storage network. Each server has four NICs, two connected to pod-level network switches and two connected to storage network switches.</para>
    <para>There are two ways to configure the storage network:</para>
    <itemizedlist>
        <listitem><para> Bonded NIC and redundant switches can be deployed for NFS.  In NFS deployments, redundant switches and bonded NICs still result in one network (one CIDR block+ default gateway address).</para></listitem>
        <listitem><para> iSCSI can take advantage of two separate storage networks (two CIDR blocks each with its own default gateway). Multipath iSCSI client can failover and load balance between separate storage networks.</para></listitem>
    </itemizedlist>
    <mediaobject>
        <imageobject>
            <imagedata fileref="./images/nic-bonding-and-multipath-io.png" />
        </imageobject>
        <textobject><phrase>NIC Bonding And Multipath I/O</phrase></textobject>
    </mediaobject>
    <para> This diagram illustrates the differences between NIC bonding and Multipath I/O (MPIO). NIC bonding configuration involves only one network. MPIO involves two separate networks.</para>
</section>