Poor Write Performance

Some network adapters, like RTL8111/8168B, are known to fail to deliver full-bandwidth, full-duplex network traffic. This can result in poor write performance.

So before deploying a Parallels Cloud Storage cluster, you are highly recommended to test networks for full-duplex support. You can use the netperf utility to simultaneously generate in and out traffic. For example, in 1 GbE networks, it should constantly deliver about 2 Gbit/s of total traffic (1 Gbit/s for incoming and 1 Gbit/s for outgoing traffic).