ZFS Replication performance

Hi,

got a second zfs system to play around with and am trying zfs replication atm.

System1:
i3 4310, 16gb, 8x3TB mirror'ed main pool, 10GBE (PULL)

System2:
Avoton 2750, 32GB, 6x2TB Z2, 10GBE (PUSH)

I have tested both systems inidvidually that they can send and receive data >300MB/s (thats not close to max but fair enough for me) (Cifs test from desktop).
Now when i run a replication from S1 to S2 its limited to 600mbit and i wonder whether thats an architectural problem?

I noted that i...

ZFS Replication performance