In OM HA, currently when allocateBlock is called, in applyTransaction() on all OM nodes, we make a call to SCM and write the allocateBlock information into OM DB. The problem with this is, every OM allocateBlock and appends new BlockInfo into OMKeyInfom and also this a correctness issue. (As all OM's should have the same block information for a key, even though eventually this might be changed during key commit)
The proposed approach is:
1. Calling SCM for allocation of block will happen outside of ratis, and this block information is passed and writing to DB will happen via Ratis.