With so many “next-generation” data management solutions available today, why would anyone choose SAN (Storage Area Network) over something like HCI or just moving everything straight to the cloud?
I see SAN as a solution to a problem. SAN takes away the complexity of a multi-server environment by consolidating storage onto a single, high-performance appliance that is redundant and accessible over a private network.
This architecture is also useful if you have already invested significantly in compute but need to scale storage on demand. With SAN, you can fully maximise compute capacity while scaling storage capacity independently, squeezing every compute cycle and GB out of your investments.
Pooling resources together offers some cost benefits as well—there is economy in scale after all! Take, for example, an implementation with 20 independent VMware data stores, each with around 150GB of free space. While there is plenty of compute, the VM requires ~200GB of storage capacity. In this instance, you would have to purchase a new server to accommodate just a single VM, even though there is around 3TB worth of unused storage space just sitting there.
What if the CPU utilization is around 30% on all servers and RAM is at 40%, but there are no more HDD slots? You could maybe put in new disks to compensate, but what do you do with the VMs while you perform this upgrade? SAN enables you to seamlessly migrate workloads from one server to another and perform maintenance of underlying systems without any disruption. With SAN, workloads of different sizes can even sit on the same shared storage but utilize different compute.
By choosing to put NetApp at the heart of your SAN infrastructure, you get many other great features:
Matt is the Head of Global Infrastructure at Alfred H Knight (AHK) based in Liverpool, UK. AHK has been providing scientific support to the mining industry since 1881. Matt has over a decade of IT experience, and has been working with NetApp since 2016. When he's not designing and implementing IT infrastructure at work, he can be found in front of his BBQ/smoker working on perfecting the perfect smoked delights. He's also an animal lover, with a whole farm's worth of critters in his back garden. Matt would say he's an "urban chicken keeper, a Jack Russel tamer, and a rabbit wrangler."
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