Uncompromising Resiliency

(cross-posted at https://www.nimblestorage.com/blog/uncompromising-resiliency/)

The cardinal rule for enterprise storage systems is to never compromise when it comes to data integrity and resiliency.  Everything else, while important, is secondary.

Many storage consumers are not aware of what data integrity mechanisms are available or which ones are necessary to meet their protection expectations and requirements. It doesn’t help that a lot of the technologies and the errors they prevent are rather esoteric. However, if you want a storage system that safely stores your data and always returns it correctly, no measure is too extreme.

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The Importance of Automated Headroom Management

Before we begin: This is another vendor-neutral post. I realize there may be no architecture that can do everything I’m proposing, but some may come closer to what you need than others. Whether you’re a vendor or a customer, see it as stuff you should be doing or be asking for respectively…

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The Importance of SSD (and other) Firmware Updates

I wanted to bring this crucial issue to light since I’m noticing several storage vendors being either cavalier about this or simply unaware.

I will explain why solutions that don’t offer some sort of automated, live SSD firmware update mechanism are potentially extremely risky propositions. Yes, this is another “vendor hat off, common sense hat on” type of post.

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The Importance of the Effective Capacity Ratio in Modern Storage Systems

In modern storage devices (especially All Flash Arrays), extensive data reduction techniques are commonplace and expected by customers.

This has, unavoidably, led to various marketing schemes that aim to make certain systems seem more appealing than the rest. Or at least not less appealing…

I will attempt to explain what customers should be looking for when trying to decipher capacity claims from a manufacturer.

In a nutshell – and for the ADD-afflicted – the most important number you should be looking for is the Effective Capacity Ratio, which is simply: (Effective Capacity)/(Raw Capacity). Ignore the more common but far less useful Data Reduction Ratio, which is: (Effective Capacity)/(Usable Capacity).

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The Well-Behaved Storage System: Automatic Noisy Neighbor Avoidance

This topic is very near and dear to me, and is one of the big reasons I came over to Nimble Storage.

I’ve always believed that storage systems should behave gracefully and predictably under pressure. Automatically. Even under complex and difficult situations.

It sounds like a simple request and it makes a whole lot of sense, but very few storage systems out there actually behave this way. This creates business challenges and increases risk and OpEx.

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