|By Chris Evans||
|November 14, 2012 08:30 AM EST||
In the first wave of solid-state storage arrays, we saw commodity style SSDs (solid state drives) being added to traditional storage arrays. This solution provided an incremental benefit in performance over spinning hard drives, however the back-end technology in these arrays was developed up to 20 years ago and was purely focused around driving performance out of the slowest part of the infrastructure – the hard drive. Of course SSDs are an order of magnitude faster than HDDs so you can pretty much guarantee SSDs in traditional arrays results in underused resources, but is premium priced.
Wave 2 of SSD arrays saw the development of custom hardware, mostly still continuing to use commodity SSDs. At this point we saw full exploitation of the solid state capabilities, with architecture designed to provide the full performance capabilities of solid state drives. These arrays removed unnecessary or bottlenecking features (like cache) and provided much more back-end scalability. Within the wave 2 group, Nimbus Data have chosen a hybrid approach and developed their own solid state drives. This gives them more control over the management functionality of the SSDs and subsequently more control over performance and availability.
Notably, some startup vendors have taken a slightly different approach. Violin Memory have chosen from day 1 to use custom NAND memory cards called VIMMs (Violin Intelligent Memory Module). This technology removes the need for NAND to emulate a hard drive and for the interface between the processor/memory & persistent memory (e.g. the NAND) to go across a hard drive interface like SAS using the SCSI protocol. Whilst it could be debated that the savings from removing the disk drive protocol could be marginal, the use of NAND that doesn’t emulate hard drives is about much more than that. SSD controllers have many features to extend the life of the drive itself. This includes wear levelling and garbage collection, features that could have a direct impact on device performance. Custom NAND components can, for instance allow wear levelling to be achieved across the entire array or for individual cell failures to be managed more efficiently.
Building bespoke NAND components isn’t cheap. Violin have chosen to invest in technology that they believe gives them an advantage in their hardware – no dependency on SSD manufacturers. The ability to build advanced functionality into their persistent memory means availability can be increased (components don’t need to be swapped out as frequently – failing components can be partially used).
At this point we should do a call out to Texas Memory Systems, recently acquired by IBM. They have also used custom NAND components; their RamSan-820 uses 500GB flash modules using eMLC memory.
I believe that the third wave will see many more vendors looking to move away from the SSD form factor and building bespoke NAND components as Violin have done. Currently Violin and TMS have the headstart. They’ve done the hard work and built the foundation of their platform. Their future innovations will probably revolve around bigger and faster devices and replacing NAND with whatever is the next generation of persistent memory.
Last week, HDS announced their approach to full flash devices; a new custom-build Flash Module Drive (FMD) that can be added to the VSP platform. This provides 1.6TB or 3.2TB (higher capacity due March 2013) of storage per module, which can then be stacked into an 8U shelf of 48 FMDs in total – a total of 600TB of flash in a single VSP. Each FMD is like a traditional SSD drive in terms of height and width, but is much deeper in size. It appears to the VSP as a traditional SSD.
The FMD chassis is separate to the existing disk chassis that are deployed in the VSP and so FMDs can’t be deployed in conjunction with hard drives. Although this seems like a negative, the flash modules have higher specification back-end directors (to fully utilise the flash performance), which, in addition to their size, explains why they wouldn’t be mixed together.
Creating a discrete flash module provides Hitachi with a number of benefits compared to individual MLC SSDs including:
- Higher performance on mixed workloads
- Inbuilt compression using the onboard custom chips
- Improved ECC error correction using onboard code and hardware
- Lower power per TB consumption from higher memory density
- > 1,000,000 IOPS in a single array
The new FMDs can also be used with HDT (dynamic tiering) to cater for mixed sub-LUN workloads and of course Hitachi’s upgraded microcode is already optimised to work with flash devices.
The Architect’s View
Solid state storage continues to evolve. NAND flash is fast and has its foibles but this can be overcome with dedicated NAND modules. Today, only four vendors have moved to dedicated solid-state components while the others continue to use commodity SSDs. At scale, performance and availability, when viewed in terms of consistency become much more important. Many vendors today are producing high performance devices, but how well will they scale going forward and how resilient will they be? As the market matures, these differences will be the dividing line between survival and failure.
Disclaimer: I recently attended the Hitachi Bloggers’ and Influencers’ Days 2012. My flights and accommodation were covered by Hitachi during the trip, however there is no requirement for me to blog about any of the content presented and I am not compensated in any way for my time when attending the event. Some materials presented were discussed under NDA and don’t form part of my blog posts, but could influence future discussions.
- Optimising Storage Architectures for SSD
- Hitachi Accelerated Flash Storage Ignites Flash From Enlightenment to Productivity
Comments are always welcome; please indicate if you work for a vendor as it’s only fair. If you have any related links of interest, please feel free to add them as a comment for consideration.
Almost two-thirds of companies either have or soon will have IoT as the backbone of their business. Though, IoT is far more complex than most firms expected with a majority of IoT projects having failed. How can you not get trapped in the pitfalls? In his session at @ThingsExpo, Tony Shan, Chief IoTologist at Wipro, will introduce a holistic method of IoTification, which is the process of IoTifying the existing technology portfolios and business models to adopt and leverage IoT. He will delve in...
Feb. 25, 2017 10:45 AM EST Reads: 2,505
In the enterprise today, connected IoT devices are everywhere – both inside and outside corporate environments. The need to identify, manage, control and secure a quickly growing web of connections and outside devices is making the already challenging task of security even more important, and onerous. In his session at @ThingsExpo, Rich Boyer, CISO and Chief Architect for Security at NTT i3, will discuss new ways of thinking and the approaches needed to address the emerging challenges of securit...
Feb. 25, 2017 10:30 AM EST Reads: 1,626
One of the hottest areas in cloud right now is DRaaS and related offerings. In his session at 16th Cloud Expo, Dale Levesque, Disaster Recovery Product Manager with Windstream's Cloud and Data Center Marketing team, will discuss the benefits of the cloud model, which far outweigh the traditional approach, and how enterprises need to ensure that their needs are properly being met.
Feb. 25, 2017 10:00 AM EST Reads: 5,338
As cloud adoption continues to transform business, today's global enterprises are challenged with managing a growing amount of information living outside of the data center. The rapid adoption of IoT and increasingly mobile workforce are exacerbating the problem. Ensuring secure data sharing and efficient backup poses capacity and bandwidth considerations as well as policy and regulatory compliance issues.
Feb. 25, 2017 10:00 AM EST Reads: 2,031
In his session at 20th Cloud Expo, Chris Carter, CEO of Approyo, will discuss the basic set up and solution for an SAP solution in the cloud and what it means to the viability of your company. Chris Carter is CEO of Approyo. He works with business around the globe, to assist them in their journey to the usage of Big Data in the forms of Hadoop (Cloudera and Hortonwork's) and SAP HANA. At Approyo, we support firms who are looking for knowledge to grow through current business process, where even...
Feb. 25, 2017 10:00 AM EST Reads: 860
Cloud Expo, Inc. has announced today that Andi Mann and Aruna Ravichandran have been named Co-Chairs of @DevOpsSummit at Cloud Expo 2017. The @DevOpsSummit at Cloud Expo New York will take place on June 6-8, 2017, at the Javits Center in New York City, New York, and @DevOpsSummit at Cloud Expo Silicon Valley will take place Oct. 31-Nov. 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
Feb. 25, 2017 09:30 AM EST Reads: 2,147
SYS-CON Events announced today that Outlyer, a monitoring service for DevOps and operations teams, has been named “Bronze Sponsor” of SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Outlyer is a monitoring service for DevOps and Operations teams running Cloud, SaaS, Microservices and IoT deployments. Designed for today's dynamic environments that need beyond cloud-scale monitoring, we make monitoring effortless so you...
Feb. 25, 2017 09:15 AM EST Reads: 2,138
What are the new priorities for the connected business? First: businesses need to think differently about the types of connections they will need to make – these span well beyond the traditional app to app into more modern forms of integration including SaaS integrations, mobile integrations, APIs, device integration and Big Data integration. It’s important these are unified together vs. doing them all piecemeal. Second, these types of connections need to be simple to design, adapt and configure...
Feb. 25, 2017 09:00 AM EST Reads: 3,631
It is one thing to build single industrial IoT applications, but what will it take to build the Smart Cities and truly society changing applications of the future? The technology won’t be the problem, it will be the number of parties that need to work together and be aligned in their motivation to succeed. In his Day 2 Keynote at @ThingsExpo, Henrik Kenani Dahlgren, Portfolio Marketing Manager at Ericsson, discussed how to plan to cooperate, partner, and form lasting all-star teams to change the...
Feb. 25, 2017 09:00 AM EST Reads: 5,240
"I think that everyone recognizes that for IoT to really realize its full potential and value that it is about creating ecosystems and marketplaces and that no single vendor is able to support what is required," explained Esmeralda Swartz, VP, Marketing Enterprise and Cloud at Ericsson, in this SYS-CON.tv interview at @ThingsExpo, held June 7-9, 2016, at the Javits Center in New York City, NY.
Feb. 25, 2017 08:30 AM EST Reads: 1,055
The buzz continues for cloud, data analytics and the Internet of Things (IoT) and their collective impact across all industries. But a new conversation is emerging - how do companies use industry disruption and technology enablers to lead in markets undergoing change, uncertainty and ambiguity? Organizations of all sizes need to evolve and transform, often under massive pressure, as industry lines blur and merge and traditional business models are assaulted and turned upside down. In this new da...
Feb. 25, 2017 08:15 AM EST Reads: 7,989
When it comes to cloud computing, the ability to turn massive amounts of compute cores on and off on demand sounds attractive to IT staff, who need to manage peaks and valleys in user activity. With cloud bursting, the majority of the data can stay on premises while tapping into compute from public cloud providers, reducing risk and minimizing need to move large files. In his session at 18th Cloud Expo, Scott Jeschonek, Director of Product Management at Avere Systems, discussed the IT and busine...
Feb. 25, 2017 08:00 AM EST Reads: 5,940
In his General Session at 16th Cloud Expo, David Shacochis, host of The Hybrid IT Files podcast and Vice President at CenturyLink, investigated three key trends of the “gigabit economy" though the story of a Fortune 500 communications company in transformation. Narrating how multi-modal hybrid IT, service automation, and agile delivery all intersect, he will cover the role of storytelling and empathy in achieving strategic alignment between the enterprise and its information technology.
Feb. 25, 2017 08:00 AM EST Reads: 5,774
All clouds are not equal. To succeed in a DevOps context, organizations should plan to develop/deploy apps across a choice of on-premise and public clouds simultaneously depending on the business needs. This is where the concept of the Lean Cloud comes in - resting on the idea that you often need to relocate your app modules over their life cycles for both innovation and operational efficiency in the cloud. In his session at @DevOpsSummit at19th Cloud Expo, Valentin (Val) Bercovici, CTO of Soli...
Feb. 25, 2017 07:30 AM EST Reads: 1,177
Data is the fuel that drives the machine learning algorithmic engines and ultimately provides the business value. In his session at Cloud Expo, Ed Featherston, a director and senior enterprise architect at Collaborative Consulting, discussed the key considerations around quality, volume, timeliness, and pedigree that must be dealt with in order to properly fuel that engine.
Feb. 25, 2017 07:30 AM EST Reads: 5,945
In his session at @ThingsExpo, Steve Wilkes, CTO and founder of Striim, will delve into four enterprise-scale, business-critical case studies where streaming analytics serves as the key to enabling real-time data integration and right-time insights in hybrid cloud, IoT, and fog computing environments. As part of this discussion, he will also present a demo based on its partnership with Fujitsu, highlighting their technologies in a healthcare IoT use-case. The demo showcases the tracking of patie...
Feb. 25, 2017 07:30 AM EST Reads: 1,082
DevOps is often described as a combination of technology and culture. Without both, DevOps isn't complete. However, applying the culture to outdated technology is a recipe for disaster; as response times grow and connections between teams are delayed by technology, the culture will die. A Nutanix Enterprise Cloud has many benefits that provide the needed base for a true DevOps paradigm. In his general session at 20th Cloud Expo, Chris Brown, a Solutions Marketing Manager at Nutanix, will explore...
Feb. 25, 2017 07:15 AM EST Reads: 1,473
SYS-CON Events announced today that SD Times | BZ Media has been named “Media Sponsor” of SYS-CON's 20th International Cloud Expo, which will take place on June 6–8, 2017, at the Javits Center in New York City, NY. BZ Media LLC is a high-tech media company that produces technical conferences and expositions, and publishes a magazine, newsletters and websites in the software development, SharePoint, mobile development and commercial UAV markets.
Feb. 25, 2017 07:15 AM EST Reads: 1,865
The best way to leverage your Cloud Expo presence as a sponsor and exhibitor is to plan your news announcements around our events. The press covering Cloud Expo and @ThingsExpo will have access to these releases and will amplify your news announcements. More than two dozen Cloud companies either set deals at our shows or have announced their mergers and acquisitions at Cloud Expo. Product announcements during our show provide your company with the most reach through our targeted audiences.
Feb. 25, 2017 07:00 AM EST Reads: 9,014
SYS-CON Events announced today that Linux Academy, the foremost online Linux and cloud training platform and community, will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Linux Academy was founded on the belief that providing high-quality, in-depth training should be available at an affordable price. Industry leaders in quality training, provided services, and student certification passes, its goal is to c...
Feb. 25, 2017 05:30 AM EST Reads: 1,533