Home Data Center StarWind Virtual SAN VAAI (vStorage API for Array Integration) Configuration & Performance Guide

StarWind Virtual SAN VAAI (vStorage API for Array Integration) Configuration & Performance Guide

StarWind Virtual SAN VAAI (vStorage API for Array Integration) Configuration & Performance Guide

This document is for experienced StarWind users and VMware administrators, who want to decrease the workload caused on the network by using VAAI. It reveals how exactly one can check if VAAI is working properly and how productive it is.

VAAI (vStorage API for Array Integration) is a complex of technologies, designed to offload certain VM disk operations to the storage array. In this case, when working with the disk subsystem, the virtualization host commands the array to perform specific actions, without having to process all the data it had to in the traditional case.

In this event, we have a few mounted disks on ESX host. The properties of disk system show that hardware acceleration has Unknown status. This means that the host hasn’t yet had to perform any VAAI supported operations (basically – it’s a default status). Once an operation supported by VAAI (i.e. Copy/Paste of a virtual disk) is performed, then VAAI will try to tune in. If it succeeds, the Supported status will appear, if not — Not Supported (Unsupported).

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StarWind StarWind Software is a pioneer of storage virtualization. It keeps innovating and putting into production solutions built with a revolutionary vision years before these ideas get adopted by the rest of the IT world. Many companies claim doing this but few actually do. The company provides an extensive suite of advanced technologies for storage management in its leading product – StarWind Virtual SAN.

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