a2d662d600
The XML root element of Docbook XML files should match the following format: <ELEMENT xmlns="http://docbook.org/ns/docbook" xmlns:xi="http://www.w3.org/2001/XInclude" xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0" xml:id="THE_XML_ID_OF_THE_ELEMENT"> Change-Id: I1e0804e2c5021bd78b77483f3156c5b069453555
57 lines
2.4 KiB
XML
57 lines
2.4 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<section xmlns="http://docbook.org/ns/docbook"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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version="5.0"
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xml:id="example-object-storage-installation-architecture">
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<title>Example of Object Storage installation architecture</title>
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<itemizedlist>
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<listitem>
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<para>Node: A host machine that runs one or more OpenStack
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Object Storage services.</para>
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</listitem>
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<listitem>
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<para>Proxy node: Runs proxy services.</para>
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</listitem>
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<listitem>
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<para>Storage node: Runs account, container, and object
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services. Contains the SQLite databases.</para>
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</listitem>
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<listitem>
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<para>Ring: A set of mappings between OpenStack Object
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Storage data to physical devices.</para>
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</listitem>
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<listitem>
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<para>Replica: A copy of an object. By default, three
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copies are maintained in the cluster.</para>
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</listitem>
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<listitem>
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<para>Zone: A logically separate section of the cluster,
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related to independent failure characteristics.</para>
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</listitem>
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<listitem>
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<para>Region (optional): A logically separate section of
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the cluster, representing distinct physical locations
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such as cities or countries. Similar to zones but
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representing physical locations of portions of the
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cluster rather than logical segments.</para>
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</listitem>
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</itemizedlist>
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<para>To increase reliability and performance, you can add
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additional proxy servers.</para>
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<para>This document describes each storage node as a separate zone
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in the ring. At a minimum, five zones are recommended. A zone
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is a group of nodes that are as isolated as possible from other
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nodes (separate servers, network, power, even geography). The
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ring guarantees that every replica is stored in a separate
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zone. This diagram shows one possible configuration for a
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minimal installation:</para>
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<para><inlinemediaobject>
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<imageobject>
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<imagedata
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fileref="../figures/swift_install_arch.png"
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/>
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</imageobject>
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</inlinemediaobject></para>
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</section>
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