Virtual Networking: Poll-mode vs Interrupt
The VMkernel is relying on the physical device, the pNIC in this case, to generate interrupts to process network I/O. This traditional style of I/O processing incurs additional delays on…
Distributed Storage Network Topology
This is a short write-up about why you should consider a certain network topology when adopting scale-out storage technologies in a multi-rack environment. Without going into too much detail, I…
VXLAN Offloading Support
Modern physical NICs (pNIC) have several offloading capabilities. If you are running VMware NSX, which is using VXLAN, you could benefit from the VXLAN offloading feature. Using VXLAN offloading allows…
IoT – Everything and everyone smartly connected
The subject Internet of Things (IoT) is intriguing to me, both from a technical and personal point-of-view. IoT to me is where all current cloud initiatives and network virtualization innovations come…
VXLAN and Multiple Receive Threads explained
The (Dynamic) NetQueue feature in ESXi, which is enabled by default if the physical NIC (pNIC) supports it, allows incoming network packets to be distributed over different queues. Each queue…
Using CPU limits in vCloud for NFV
Looking at the VMware vCloud for NFV proposition, you will notice that vCloud Director (vCD) is one of the options for the Virtualized Infrastructure Manager (VIM) layer based on the…