Enterprise SSDs: The Case for All-Flash Data Centers – EnterpriseStorageForum.com
An IT industry analyst article published by Enterprise Storage Forum.
by Mike Matchett, Sr. Analyst
Adding small amounts of flash as cache or dedicated storage is certainly a good way to accelerate a key application or two, but enterprises are increasingly adopting shared all-flash arrays to increase performance for every primary workload in the data center.
Flash is now competitively priced. All-flash array operations are simpler than when managing mixed storage, and the performance acceleration across-the-board produces visible business impact.
However, recent Taneja Group field research on all-flash data center adoption shows that successfully replacing traditional primary storage architectures with all-flash in the enterprise data center boils down to ensuring two key things: flash-specific storage engineering and mature enterprise-class storage features.
When looking for the best storage performance return on investment (ROI), it simply doesn’t work to replace HDDs with SSDs in existing traditional legacy storage arrays. Even though older generation arrays can be made faster in spots by inserting large amounts of underlying flash storage, there will be too many newly exposed overall performance bottlenecks to make it a worthwhile investment. After all, consistent IO performance (latency, IOPs, bandwidth) for all workloads is what makes all-flash a winning data center solution. It’s clear that to leverage a flash storage investment, IT requires flash-engineered designs that support flash IO speeds and volumes.
Even if all-flash performance is more than sufficient for some datacenter workloads, the cost per effective GB in a new flash engineered array can now handily beat sticking flash SSDs into older arrays, as well as readily undercutting large HDD spindle count solutions. A big part of this cost calculation stems from built-in wire speed (i.e. inline) capacity optimization features like deduplication and compression found in almost all flash engineered solutions. We also see increasing flash densities continuing to come to market (e.g., HPE and Netapp have already announced 16TB SSDs) with prices inevitably driving downwards. These new generations of flash are really bending flash “capacity” cost curves for the better.
All-Flash Field Research Results
Recently we had the opportunity to interview all-flash adopting storage managers with a variety of datacenter workloads and business requirements. We found that it was well understood that flash offered better performance. Once an all-flash solution was chosen architecturally, other factors like cost, resiliency, migration path and ultimately storage efficiency tended to drive vendor comparisons and acquisition decision-making. Here are a few interesting highlights from our findings:
Simplification – The deployment of all-flash represented an opportunity to consolidate and simplify heterogenous storage infrastructure and operations, with major savings just from environment simplification (e.g. reduction in number of arrays/spindles).
Consistency – The consistent IO at scale offered from an all-flash solution deployed across all tier 1 workloads greatly reduced IT storage management activities. In addition…(read the complete as-published article there)