59 lines
2.5 KiB
XML
59 lines
2.5 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="objectstorage_characteristics">
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<title>Object Storage characteristics</title>
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<para>The key characteristics of Object Storage are that:</para>
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<itemizedlist>
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<listitem>
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<para>All objects stored in Object Storage have a URL.</para>
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</listitem>
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<listitem>
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<para>All objects stored are replicated 3✕ in as-unique-as-possible zones, which
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can be defined as a group of drives, a node, a rack, and so on.</para>
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</listitem>
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<listitem>
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<para>All objects have their own metadata.</para>
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</listitem>
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<listitem>
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<para>Developers interact with the object storage system through a RESTful HTTP
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API.</para>
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</listitem>
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<listitem>
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<para>Object data can be located anywhere in the cluster.</para>
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</listitem>
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<listitem>
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<para>The cluster scales by adding additional nodes without sacrificing performance,
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which allows a more cost-effective linear storage expansion than fork-lift
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upgrades.</para>
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</listitem>
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<listitem>
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<para>Data doesn't have to be migrate to an entirely new storage system.</para>
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</listitem>
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<listitem>
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<para>New nodes can be added to the cluster without downtime.</para>
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</listitem>
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<listitem>
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<para>Failed nodes and disks can be swapped out without downtime.</para>
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</listitem>
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<listitem>
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<para>It runs on industry-standard hardware, such as Dell, HP, and Supermicro.</para>
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</listitem>
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</itemizedlist>
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<figure>
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<title>Object Storage (swift)</title>
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<mediaobject>
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<imageobject>
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<imagedata fileref="../common/figures/objectstorage.png"/>
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</imageobject>
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</mediaobject>
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</figure>
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<para>Developers can either write directly to the Swift API or use one of the many client
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libraries that exist for all of the popular programming languages, such as Java, Python,
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Ruby, and C#. Amazon S3 and RackSpace Cloud Files users should be very familiar with Object
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Storage. Users new to object storage systems will have to adjust to a different approach and
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mindset than those required for a traditional filesystem.</para>
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</section>
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