Sync performance HAST and ggate/gmirror on Xen

[Carsten Heesch]

> I'm experiencing dreadful performance (sync throughput less than 1MB/sec) with both replication options, and am not quite sure how to troubleshoot that, because the network speed between two DomU's is otherwise well beyond 50MB/sec. 

Have done some further testing. This only happens with amd64/XENHVM (xen network driver). Generic amd64 kernels (re network driver) work just fine, although the network driver seems to be a little bit slower. 


Cheers
C.