The NetApp Element Plug-in for vCenter Server allows, as an optional setting, automatic quality of service (QoS) based on storage I/O control (SIOC) settings of all VMs on a datastore.
QoS and SIOC integration (QoSSIOC), which can be enabled for datastores in the user interface, runs a scan of all SIOC settings on all associated VMs. QoSSIOC automation is triggered by VM power, guest, and reconfiguration activity. The QoSSIOC service uses the sum of all SIOC reservations or shares and the sum of IOPS limits to determine minimum and maximum QoS for the underlying volume of each datastore. A configurable burst factor is also available.
The following dialog box appears during QoSSIOC configuration for a datastore:
- Enable QoS & SIOC
Enables the automatic monitoring of SIOC values for each VMDK on a datastore and sets QoS values for the underlying volume according to those values.
- Burst Factor
Multiplier of the sum of SIOC IOPS limit values from each VDMK that determines the burst IOPS contribution for the underlying volume.
- Override Default QoS
- Enables the use of Shares and Limit IOPS values. These values can be used when SIOC settings for each VM are set to default.
- Shares
- The contribution of minimum IOPS from each VDMK if the SIOC settings are set to default.
- Limit IOPS
- The contribution of maximum IOPS from each VDMK if the SIOC settings are set to default.