Throttling CDP replication

[kevin.boddy]

Hi,

Is there anyway to throttle CDP's replication?

I am finding when a new CDP policy with 15x VMs and 50 disks starts it completely overwhelms the ESXi hosts.
The disk throughput for each VM completely maxes out, the CPU usage for the VM get's pegged at 100% and the ESXi host has it's CPU maxed out.

Adding a network throttling policy for the IPs of the CDP proxies kind of helps but then it never seems to reach the limit that has been set in the network policy.
Also you still see these random spikes in the VMs disk throughput like it doesn't obey the policy.

Thanks
Kevin

[kevin.boddy]

So I guess nobody knows how to do this.

From my tests enabling the network throttling between the CDP proxies does have an effect but it doesn't behave like you think it should.
I think what's happening is the CDP source proxy gets it's network throttled and then it's disk buffer starts filling up until it can't accept any more then it slows down.
What you see is a huge spike in disk IO initially then it slows down as the network throttling causes the disk buffer to fill up.

It sort of works but not ideal because you still see this huge disk IO spike on the source VM which cause a huge CPU spike on the source VM.