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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>9.5. Multi-Site Deployment</title><link rel="stylesheet" type="text/css" href="Common_Content/css/default.css" /><link rel="stylesheet" media="print" href="Common_Content/css/print.css" type="text/css" /><meta name="generator" content="publican 2.8" /><meta name="package" content="Apache_CloudStack-Installation_Guide-4.0.0-incubating-en-US-1-" /><link rel="home" href="index.html" title="CloudStack Installation Guide" /><link rel="up" href="choosing-a-deployment_architecture.html" title="Chapter 9. Choosing a Deployment Architecture" /><link rel="prev" href="multi_node_management_server.html" title="9.4. Multi-Node Management Server" /><link rel="next" href="aws-interface-compatibility.html" title="Chapter 10. Amazon Web Service Interface Compatibility" /></head><body><p id="title"><a class="left" href="http://cloudstack.org"><img src="Common_Content/images/image_left.png" alt="Product Site" /></a><a class="right" href="http://docs.cloudstack.org"><img src="Common_Content/images/image_right.png" alt="Documentation Site" /></a></p><ul class="docnav"><li class="previous"><a accesskey="p" href="multi_node_management_server.html"><strong>Prev</strong></a></li><li class="next"><a accesskey="n" href="aws-interface-compatibility.html"><strong>Next</strong></a></li></ul><div xml:lang="en-US" class="section" id="multi_site_deployment" lang="en-US"><div class="titlepage"><div><div><h2 class="title" id="multi_site_deployment">9.5. Multi-Site Deployment</h2></div></div></div><div class="para">
The CloudStack platform scales well into multiple sites through the use of zones. The following diagram shows an example of a multi-site deployment.
</div><div class="mediaobject"><img src="./images/multi-site-deployment.png" width="444" alt="Example Of A Multi-Site Deployment" /></div><div class="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.
</div><div class="mediaobject"><img src="./images/separate-storage-network.png" width="444" alt="Separate Storage Network" /></div><div class="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.
</div><div class="para">
There are two ways to configure the storage network:
</div><div class="itemizedlist"><ul><li class="listitem"><div class="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).
</div></li><li class="listitem"><div class="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.
</div></li></ul></div><div class="mediaobject"><img src="./images/nic-bonding-and-multipath-io.png" width="444" alt="NIC Bonding And Multipath I/O" /></div><div class="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.
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