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Open Standard for Datacenter Availability Tool
OSDA or the Open Standard for Datacenter Availability was kicked off by The Green Grid early in 2016 to create an availability classification and rating system that is intended to promote innovation in energy efficiency and sustainable designs of data centers. A high-level overview of the initiative is provided by White Paper #71.
The current tool, available only to members of The Green Grid, allows users to compare data center designs using the OSDA scale. The OSDA score will give a relative comparison of designs and NOT an absolute value for availability and reliability. This is intentional, since predicting actual design performance is fraught with complexity and assumptions.
It is recommended to read through the release notes and White Paper #71 before using the OSDA Excel based tool. Doing so will allow for better understanding of the results.