Flash storage moves closer to CPUs

STEC is joining the ranks of vendors selling solid-state storage for caching within servers

In a bid to maximize the speed advantage of solid-state storage, more vendors are promoting approaches that move it closer to the CPUs that process stored data.

STEC and OCZ Technology Group both introduced flash storage components for PCI-Express (PCIe) this week, with STEC moving into this market for the first time. It is making a splash with both its own line of hardware modules and a software platform that can work with solid-state components from other vendors.

Rather than a simple replacement for spinning disks in centralized storage arrays, solid state increasingly is being looked at as a component within servers to store heavily used data or act as a cache. Fusion-io led the way with this approach, and STEC, one of the biggest suppliers of flash to system vendors making traditional SSDs, is now joining in.

Solid-state storage adds some upfront costs, and building it into servers can add others, but there may be eventual savings for some enterprises, according to Enterprise Strategy Group analyst Mark Peters. The payoff can come in reducing delays.

"We've been so brainwashed in the business that the way you measure storage is cost per gigabyte," Peters said. "No one's storing anything for the sake of storing it. You're storing it because you may use it." A storage architecture that gets the data to the server more quickly, such as a PCIe card in the server, can justify the added expense.

STEC's EnhanceIO software, which is also sampling to early access customers, is likely to have a bigger impact than the PCIe cards because it will work with hardware from many vendors, Peters said.

Interest in server-based SSDs is growing, but it ultimately may not be the best strategy for enterprises with large, virtualized data centers, he said.

"You lose shareability, because it's now fixed to that server," Peters said. Centralized SSDs offer more management flexibility and don't have to be included consistently across all the servers in a data center to realize their benefits. For smaller organizations with fewer servers, server-based SSD caching may work well, he said.

On Thursday, STEC is introducing the Kronos PCIe Solid-State Accelerator module family, along with its EnhanceIO SSD Cache Software, which it says can work with the Kronos line or nearly any other SSD on the market. The company claims that the two products can dramatically cut the cost of a data center by reducing the need for very fast storage systems and other techniques for accelerating applications.

The Kronos and Kronos Turbo cards, with capacities ranging from 240GB to 980GB, can be used for primary storage within a server. But they are designed primarily to cache copies of frequently accessed data very close to the CPU for faster performance. This eliminates the delays caused by switches, RAID controllers and other components in a traditional storage system, said Scott Stetzer, STEC's vice president of technical marketing. STEC claims its new technology can cut latency from hundreds of milliseconds to 30 nanoseconds if a company is migrating from a traditional SAN (storage-area network) or iSCSI (Internet SCSI) arrangement.

SSDs cost more per gigabyte than HDDs (hard disk drives). But because SSDs offer faster data retrieval, they reduce the need for expensive, fast-spinning hard disk drives and for techniques to maximize the speed of those drives, which can involve buying many disks and not using most of their capacity. Putting the SSD in a server can boost performance even more by eliminating multiple hops across a network for the most-used bits of data.

Within the Kronos modules, STEC has taken another step to boost server performance. The cards offload I/O tasks that with some similar PCIe products would have to be performed by the CPU, the company said. This frees up chip cycles that are needed for other work, especially in busy virtualized servers, Stetzer said.

This offloading feature sets STEC apart from Fusion-io, the incumbent vendor in this market, giving STEC at least one key differentiator to help it seize market share, ESG's Peters said. However, it will remain hard for STEC and other challengers to gain ground on Fusion-io, given existing supplier arrangements with system vendors, he said. Breaking into the PCIe business is a major goal for STEC, which last month lowered its financial forecast for the current quarter because of growing competition in its core business. STEC's stock has fallen by more than 50 percent since February.

The Kronos cards can read and write sequential data at 1.1GB per second and the Kronos Turbo at 2.2GB per second, according to STEC. They are now shipping to server makers in sample quantities. A Kronos Bi-Turbo line, with capacities as high as 1.95TB and a read/write rate of 3.6GB per second, is due early next year, Stetzer said. All the cards will be available in both SLC (single-level-cell) and MLC (multilevel cell) versions and will use STEC features for high reliability, he said. They will come with a five-year warranty.

STEC's announcement on Thursday follows OCZ's introduction of a new PCIe SSD that it said has twice the performance of its previous product. The Z-Series SSD R4 comes in half-height and full-height cards with capacities ranging from 300GB to 3.2TB and can read data at a rate of 2.8GB per second, according to OCZ. Unlike OCZ's earlier products, the cards are intended for sale directly to server makers rather than to users.

Stephen Lawson covers mobile, storage and networking technologies for The IDG News Service. Follow Stephen on Twitter at @sdlawsonmedia. Stephen's e-mail address is stephen_lawson@idg.com

Join the Good Gear Guide newsletter!

Error: Please check your email address.

Tags OCZ Technology GroupSSDDrivesstorageFusion-ioSTEC

Our Back to Business guide highlights the best products for you to boost your productivity at home, on the road, at the office, or in the classroom.

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Stephen Lawson

IDG News Service
Show Comments

Most Popular Reviews

Best Deals on Good Gear Guide


Latest News Articles


GGG Evaluation Team

Kathy Cassidy


First impression on unpacking the Q702 test unit was the solid feel and clean, minimalist styling.

Anthony Grifoni


For work use, Microsoft Word and Excel programs pre-installed on the device are adequate for preparing short documents.

Steph Mundell


The Fujitsu LifeBook UH574 allowed for great mobility without being obnoxiously heavy or clunky. Its twelve hours of battery life did not disappoint.

Andrew Mitsi


The screen was particularly good. It is bright and visible from most angles, however heat is an issue, particularly around the Windows button on the front, and on the back where the battery housing is located.

Simon Harriott


My first impression after unboxing the Q702 is that it is a nice looking unit. Styling is somewhat minimalist but very effective. The tablet part, once detached, has a nice weight, and no buttons or switches are located in awkward or intrusive positions.

Latest Jobs


Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?