[ovirt-devel] Should we call meta data operations by using mailbox in normal host or directly call these in SPM?

[pengyixiang]

Hello, everyone!
     We know when some meta data operations like volume create exec in normal host, this normal host will retransport these commands by mailbox to spm, 
but why Engine don't directly call these operations by RPC in SPM?  I am confused about these two.
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