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Closes-Bug: #1719095 Change-Id: I8051895987bf72c8095e72b5a521042a13993174 Signed-off-by: Thiago da Silva <thiago@redhat.com>
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Erasure coding
Erasure coding is a set of algorithms that allows the reconstruction
of missing data from a set of original data. In theory, erasure coding
uses less capacity with similar durability characteristics as replicas.
From an application perspective, erasure coding support is transparent.
Object Storage (swift) implements erasure coding as a Storage Policy.
See /overview_policies
for more details.
There is no external API related to erasure coding. Create a container using a Storage Policy; the interaction with the cluster is the same as any other durability policy. Because support implements as a Storage Policy, you can isolate all storage devices that associate with your cluster's erasure coding capability. It is entirely possible to share devices between storage policies, but for erasure coding it may make more sense to use not only separate devices but possibly even entire nodes dedicated for erasure coding.