Erasure coding

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Hi,

The general idea to preserve resilience but save space compared to replication. It costs more in terms of CPU and network. You will find a short introduction here : 
 
https://wiki.ceph.com/Planning/Blueprints/Dumpling/Erasure_encoding_as_a_storage_backend
https://wiki.ceph.com/Planning/Blueprints/Firefly/Erasure_coded_storage_backend_%28step_3%29

For the next Ceph release Pyramid Codes will help reduce the bandwidth requirements https://wiki.ceph.com/Planning/Blueprints/Giant/Pyramid_Erasure_Code

Cheers

On 19/05/2014 13:52, yalla.gnan.kumar at accenture.com wrote:
> Hi All,
> 
>  
> 
> What exactly is erasure coding and why is it used in ceph ? I could not get enough explanatory information from the documentation.
> 
>  
> 
>  
> 
> Thanks
> 
> Kumar
> 
> 
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-- 
Lo?c Dachary, Artisan Logiciel Libre

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