48 lines
1.6 KiB
ReStructuredText
48 lines
1.6 KiB
ReStructuredText
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Object Storage characteristics
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The key characteristics of Object Storage are that:
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- All objects stored in Object Storage have a URL.
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- "Storage Policies" may be used to define different levels of durability
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for objects stored in the cluster. These policies support not only
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complete replicas but also erasure-coded fragments.
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- All replicas or fragments for an object are stored in as-unique-as-possible
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zones to increase durability and availability.
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- All objects have their own metadata.
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- Developers interact with the object storage system through a RESTful
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HTTP API.
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- Object data can be located anywhere in the cluster.
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- The cluster scales by adding additional nodes without sacrificing
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performance, which allows a more cost-effective linear storage
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expansion than fork-lift upgrades.
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- Data does not have to be migrated to an entirely new storage system.
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- New nodes can be added to the cluster without downtime.
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- Failed nodes and disks can be swapped out without downtime.
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- It runs on industry-standard hardware, such as Dell, HP, and
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Supermicro.
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.. _objectstorage-figure:
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Object Storage (swift)
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.. figure:: figures/objectstorage.png
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Developers can either write directly to the Swift API or use one of the
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many client libraries that exist for all of the popular programming
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languages, such as Java, Python, Ruby, and C#. Amazon S3 and RackSpace
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Cloud Files users should be very familiar with Object Storage. Users new
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to object storage systems will have to adjust to a different approach
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and mindset than those required for a traditional filesystem.
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