It’s a custom log-based block device implemented on top of Colossus/D. As such it connects to storage nodes using regular data center network. This is why (in s

It’s a custom log-based block device implemented on top of Colossus/D. As such it connects to storage nodes using regular data center network. This is why (in some cases) both IO and network-intensive workload may compete for the same bandwidth on the host.