On Wed, 30 Sep 2015, Wouter De Borger wrote:
> Hi all,
> In the original paper (RADOS: a scalable, reliable storage service for
> petabyte-scale storage clusters), three replication schemes were described
> (primary copy, chain and splay).
> 
> Now the documentation only discusses primary copy. Does the chain scheme
> still exist?
> It would be much more bandwidth efficient for me.

Nope--it wsa removed years ago due to the complexity of maintaining all 
three, and because the asymmetric data path caused a lot of other 
problems.

s
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