Daniel,

>Q1: Could anyone suggest me the way to use zeromq as my infrastructure?
>
>To make sure user will receive feed back only when message processed by
>kernel.  I use PUB/SUB in all the path from node to kernel.

As far as I understand, you need to get a response to the client. Thus
what you need is REQ/REP pattern rather than PUB/SUB.

>Q2: Will all PUB/SUB promise won't lost, and delivery in the original order?

No. You need either REQ/REP or PUSH/PULL for that.

Martin
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