Configuring per-VMDK IOPS reservations in vSphere 6.0

One of the new features in vSphere 6.0 that was quickly mentioned at the end of Duncan Epping’s What’s New Storage DRS blog post is the ability to configure an IOPS reservation on a per-VMDK basis which is now integrated with both Storage IO Control (SIOC) and Storage DRS. As Duncan mentioned at the end […]

Does SIOC actually require Enterprise Plus & vCenter Server?

After reading a recent blog post by Duncan Epping, SIOC, tying up some loose ends, I decided to explore whether or not VMware’s Storage I/O Control feature actually requires an Enterprise Plus license and vCenter Server. To be completely honest, Duncan’s article got me thinking but it was also my recent experience with VMware’s vsish […]

What is VMware vsish?

Recently while I was working on testing automated ESXi kickstart installations, I needed to extract some information as part of the build process, but the utilities that were used no longer existed in ESXi’s Busybox console. Looking around, I found another way to extract the information I needed, which was using VMware’s undocumented vsish utility, […]

Script - Automate Storage I/O Control in vSphere 4.1 (

Storage I/O Control is a new feature of vSphere 4.1 which allows a user to┬ádefine the QoS prioritization for the I/O activity on a single host or a cluster of hosts. SIOC supports only VMFS volumes and the latency threshold is configured on a per VMFS datastore. Currently, the only method of configuring SIOC is […]