Nasuni conducted the tests on five of the largest CSPs: Azure, AWS, HP, Rackspace and Google Cloud. A write/read/delete test determined how effective each provider was at uploading data of various sizes (between 1KB and 1GB) to its cloud, recalling the randomly generated file and deleting it. Microsoft Azure was 56% faster than AWS S3 when it came to writing data into its cloud, and 39% faster when reading data.
Another test measured how reliable the clouds were by conducting a read/write/delete every minute for a month straight and determining how consistent the process is when repeated that many times. Azure was 25% faster on average compared to AWS S3 when performing a repetitive task every 60 seconds for 30 days.
A third test measured how the clouds handled increasingly larger file sizes being continuously uploaded to its cloud. AWS came out on top in that test with a variance of 0.6% as larger and larger files were placed into its cloud, with Azure coming in a close second with a 1.9% variance. The OpenStack-powered clouds were not as reliable when scaled up to extremely large file storage, with HP and Rackspace's cloud having variance levels of 23.5% and 26.1% respectively."
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