When performing P2V conversions with SCVMM 2012 RC, I encounter strange performance problems - I only get rates around 3-6 MB/s for the data transfer. I suspect BITS for slowing things down, but have not figured out the definite root cause yet.
The source machines are Windows Server 2008 SP2 hosts in a local network. The destination is a Hyper-V 2008 R2 SP1. The type of conversion seems not to matter much - I see similar results for offline and online conversions. After starting four parallel conversions
the Hyper-V performance graph for disk write throughput (MB/s, red line) against idle time (percentage, blue line) looks like this:
The spikes in the write throughput graph tell me that something is pausing the data transfer every other second. Also, since it would just look too artificial to have four source machines pause sending synchronously, I suspect the Hyper-V or SCVMM side of
things to cause the slowdown.
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