ceph/ceph — pull request #1350 by dachary (2014-03-03 14:49:47+00:00)
Title: pool create erasure : implicit ruleset creation

It helps user experience and documentation by removing the requirement to create a matching ruleset for the erasure coded pools

./ceph osd crush rule create-erasure erasure-code-k=3 ecruleset
./ceph osd pool create ecpool 12 12 erasure crush_ruleset=ecruleset erasure-code-k=3

can be replaced with

./ceph osd pool create ecpool 12 12 erasure erasure-code-k=3

and a new **ecpool** ruleset will be created (named after the pool name).

http://tracker.ceph.com/issues/7571