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A Guide to All-Flash Arrays and the Benefits They Bring
What Is An All-Flash Array?
An all-flash array (AFA) is a storage infrastructure that contains only flash memory drives instead of spinning-disk drives. All-flash storage is also referred to as a Solid-State Array (SSA). AFAs and SSAs offer speed, performance, and agility for your business applications.
Where Do All-Flash Arrays Fit Into the World of Data Storage?
For much of modern history, data centers have been dominated by hard-disk drive (HDD) technologies configured as network-attached storage (NAS) and/or storage area networks (SANs).
With the advent of solid-state drives (SSDs), data storage companies started offering expensive high-performance flash memory offerings for Tier 0 and Tier 1 data applications. The lack of spinning disks means solid-state drives are orders of magnitude faster than traditional technologies.
Thanks to Moore’s Law, flash storage continued to become more cost-effective, making the all-flash versions of NAS devices and SANs economically feasible. Pure Storage® deals exclusively with these all-flash arrays (AFAs).
All-Flash Arrays: Bringing the Benefits of Flash Memory to the Data Center
As you might guess, simply switching out your HDDs with SSDs is enough to increase the speed and performance of your NAS and SAN solutions. The benefits of an all-flash array are the same as the benefits of flash memory itself:
- Speed: Faster memory read-write and access times lead to improved speed and performance. The best all-flash arrays leverage NVMe over Fabrics (NVMe-oF) to maximise data transfer speeds and latencies throughout a SAN.
- Portability: SSDs are significantly smaller than HDDs. On a purely physical basis, flash memory has the advantage of space-per-capacity. On a cost-per-capacity basis, flash memory is quickly closing ground on HDD solutions.
- Durability: The lack of physical moving parts makes SSDs inherently less vulnerable to drops and shocks than their spinning-disk counterparts.
Test Drive FlashArray//X
Work in a self-service environment to experience the management of a Pure FlashArray™//X. Explore advanced features, including snapshots, replication, ActiveCluster, and even VMware integration.
All-Flash Arrays vs. Hybrid Storage Arrays vs. HDD Arrays
Should you go all-flash, hybrid, or traditional? It’s a question many businesses face when picking the right on-premises data storage solution for their needs. Factors such as speed, performance, and reliability are only part of the equation. Ease of adoption, maintenance, and security are also top of mind.
Generally speaking, all-flash arrays are the fastest and most performant. These are followed by hybrid arrays which use a combination of flash and HDD within the same storage array. While not as fast as all-flash arrays, cheaper HDD racks may be used to add capacity when performance isn’t needed. Traditional arrays are the slowest.
Why Choose Pure for All-Flash Arrays?
Although modern data centers are looking to all-flash arrays as a solution to performance and capacity demands, not every all-flash array is created equal. It's important to understand the difference between purpose-built arrays and retrofit arrays. Retrofits attempt to combine all-flash with 20-year old disk-based architectures, preventing customers from getting the best ROI and exposing shortcomings in performance, reliability, and simplicity.
Pure Storage FlashArray™, via its stateless architecture and flexible metadata, has a proven history of enabling customers to take advantage of both flash and compute advances—non-disruptively. The simplicity and agility of Pure Storage solutions eliminate the constraints of retrofit flash-based alternatives and the complexity of traditional storage portfolios.
All-Flash Array Use Cases
So where do all-flash storage arrays fit into the enterprise-tiered storage hierarchy? Due to the higher cost of SSDs over HDDs, all-flash storage arrays have long been treated as the premium SAN solution for Tier 0 and Tier 1 applications. However, thanks to Moore’s Law, the cost efficiency of all flash-arrays is on the rise, unlocking higher storage tiers. Pure Storage’s FlashArray//C is the first all-flash SAN designed to compete at cost with hybrid storage arrays targeting Tier 2 storage applications.
Below is an overview of use-cases per storage tier for all-flash storage arrays:
- Tier 0: The highest performance tier (greatest IOPS/$), covers block storage solutions for financial transactions, ecommerce apps, and any applications where performance is a premium.
- Tier 1: The second-highest performance tier (balance between IOPS/$ and capacity), covers business processing, data analysis, and data mining.
- Tier 2: Lower performance tier (capacity focused), covers email, file, and print, data backups, and archives.
Enterprise Flash Storage Arrays from Pure Storage
Enterprise-grade storage arrays are purpose-built to take advantage of the unique characteristics of flash.
Pure Storage currently offers two all-flash storage array product lines to address Tier 0, Tier 1, and Tier 2 storage needs:
- FlashArray//X: A performance-optimised, all-flash, end-to-end NVMe and NVMe-oF storage array designed to provide block storage for Tier 0 and Tier 1 applications
- FlashArray//C: A capacity-optimised, all-flash NVMe storage array for Tier 2 applications
These all-flash arrays (AFAs) are revolutionising storage by offering cloud-like application consolidation and unprecedented agility—features that serve as catalysts for both IT and business transformation. Pure Storage is a leader in this market, as highlighted in the latest Gartner Magic Quadrant and Gartner Critical Capabilities reports on solid-state arrays.
