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May 2020, Vol. 18, No. 2

Beat the software bottleneck by improving storage performance

Storage systems no longer live up to their full potential. Proving this statement requires a little math. If you add up the raw performance of each drive in an all-flash array and compare it to the stated performance of that array, you will find a significant difference. The math suggests the all-flash system should be able to generate millions of IOPS, yet most can't create more than a few hundred thousand. Understanding the reason for the performance gap requires understanding storage systems architecture. Most storage systems today consist of an ecosystem of CPUs, memory, internal and external networking, storage media and storage software. The storage software is what data storage managers interact with as they provision and protect the data stored on the media. Except for the software, each component in the storage ecosystem has become faster and less latent. For example, CPUs now have more cores, storage media is flash instead of hard disk-based and networks have more bandwidth. The rise in the number of vendors within the...

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