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51 lines
3.0 KiB
XML
51 lines
3.0 KiB
XML
<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % BOOK_ENTITIES SYSTEM "cloudstack.ent">
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%BOOK_ENTITIES;
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]>
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<!-- Licensed to the Apache Software Foundation (ASF) under one
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or more contributor license agreements. See the NOTICE file
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distributed with this work for additional information
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regarding copyright ownership. The ASF licenses this file
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to you under the Apache License, Version 2.0 (the
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"License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0.
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Unless required by applicable law or agreed to in writing,
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software distributed under the License is distributed on an
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"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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KIND, either express or implied. See the License for the
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specific language governing permissions and limitations
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under the License.
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-->
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<section id="multi_site_deployment">
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<title>Multi-Site Deployment</title>
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<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>
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<mediaobject>
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<imageobject>
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<imagedata fileref="./images/multi-site-deployment.png" />
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</imageobject>
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<textobject><phrase>Example Of A Multi-Site Deployment</phrase></textobject>
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</mediaobject>
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<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>
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<mediaobject>
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<imageobject>
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<imagedata fileref="./images/separate-storage-network.png" />
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</imageobject>
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<textobject><phrase>Separate Storage Network</phrase></textobject>
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</mediaobject>
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<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>
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<para>There are two ways to configure the storage network:</para>
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<itemizedlist>
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<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>
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<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>
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</itemizedlist>
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<mediaobject>
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<imageobject>
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<imagedata fileref="./images/nic-bonding-and-multipath-io.png" />
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</imageobject>
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<textobject><phrase>NIC Bonding And Multipath I/O</phrase></textobject>
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</mediaobject>
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<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>
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</section>
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