Merge "Changes to section_object-storage-example-install-arch"

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Jenkins 2014-04-11 07:42:25 +00:00 committed by Gerrit Code Review
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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">
<title>Example Object Storage installation architecture</title>
<title>Example of Object Storage installation architecture</title>
<itemizedlist>
<listitem>
<para>node. A host machine that runs one or more OpenStack
<para>Node: A host machine that runs one or more OpenStack
Object Storage services.</para>
</listitem>
<listitem>
<para>Proxy node. Runs proxy services.</para>
<para>Proxy node: Runs proxy services.</para>
</listitem>
<listitem>
<para>Storage node. Runs account, container, and object
<para>Storage node: Runs account, container, and object
services. Contains the SQLite databases.</para>
</listitem>
<listitem>
<para>Ring. A set of mappings between OpenStack Object
<para>Ring: A set of mappings between OpenStack Object
Storage data to physical devices.</para>
</listitem>
<listitem>
<para>Replica. A copy of an object. By default, three
<para>Replica: A copy of an object. By default, three
copies are maintained in the cluster.</para>
</listitem>
<listitem>
<para>Zone. A logically separate section of the cluster,
<para>Zone: A logically separate section of the cluster,
related to independent failure characteristics.</para>
</listitem>
<listitem>
<para>Region (optional). A logically separate section of
<para>Region (optional): A logically separate section of
the cluster, representing distinct physical locations
such as cities or countries. Similar to zones but
representing physical locations of portions of the
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additional proxy servers.</para>
<para>This document describes each storage node as a separate zone
in the ring. At a minimum, five zones are recommended. A zone
is a group of nodes that is as isolated as possible from other
is a group of nodes that are as isolated as possible from other
nodes (separate servers, network, power, even geography). The
ring guarantees that every replica is stored in a separate
zone. This diagram shows one possible configuration for a