& Storage Evangelist
Calvin Zito is a 35 year veteran in the IT industry and has worked in storage for 27 years. He’s an 8-time VMware vExpert. As an early adopter of social media and active in communities, he has blogged for 10 years.
You can find his blog at
Most of my articles here have been looking at a topic and I write about it. In this quarter’s article, I wanted to highlight a couple of the blog articles by other experts on that have attracted a lot of attention – in other words, these articles are getting a lot of views. I’ll pull a few of the highlights from them and give you a link where you can read the details.
First article: Update on new VMware plug-ins for HPE Storage
Recently we launched new versions of our VMware plug-ins. This release brings some new features and a licensing change that I would like to highlight. I would also like to take this opportunity to give you a brief overview of our plug-in portfolio that helps provide simplified management for VMware admins.
One important thing I would like to feature right off the bat is our entire storage plug-in portfolio for VMware is now 100% completely free and fully functional. Prior to this release, most of our plug-ins were freely available with the exception of the plug-in for vRealize Operations Manager which required a paid license. Now you can use and deploy any of our plug-ins as much as you want to gain the best possible management experience for VMware.
HPE OneView for VMware vCenter (OV4VC)
Eric writes about what’s new with OV4VC and continues by looking at:
· HPE 3PAR Plug-in for VMware vRealize Orchestrator (vRO)
· HPE Storage Plug-in for vRealize Operations Manager (vROPS) and Log Insight (vLI)
· HPE 3PAR Storage Replication Adapter (SRA) Software for VMware Site Recovery Manager (SRM)
Next: The perfect union - NVM Express, Storage Class Memory and HPE Nimble Storage
Which technologies will power the next wave in storage? And how can you prepare today for what is coming tomorrow? See what answers HPE Nimble Storage has in store.
First, SCM and NVMe explained
SCM and NVM Express (NVMe) are key technologies powering the next round of improvements in storage array performance. Of the two, the emergence of new Storage Class Memory (SCM) technology is perhaps more significant, with 3D XPoint and Z-NAND memory leading the way.
These SCM media enable faster solid-state drive (SSD) access times versus those possible with standard NAND flash memory. NVMe in turn provides a needed improvement in the protocols used to access storage devices, substantially reducing the overhead of accessing high-performance SSDs.
The promise of NVMe
The NVMe storage protocol offers benefits over SAS and SATA. NVMe runs directly over PCIe, eliminating conversion costs and queuing points inherent in bridging to legacy storage interconnects. Direct PCIe access also avoids serialization bottlenecks that limit interconnect utilization with SAS and SATA. The NVMe host interface is designed to maximize CPU efficiency in performing I/O. Avoiding translation steps improves device latency. Increasing efficiency and concurrency enables higher IOPS.
Although NVMe SSDs have been available for a few years, they’ve not yet been deployed in the most cost-effective storage arrays. That’s because high availability RAID groups of SAS-connected SATA SSDs deliver plentiful throughput with superior economics and scalability versus high availability solutions using NVMe SSDs. As NVMe economics and scalability catch up, storage arrays will shift to take advantage of its relative strengths.
How does SCM fit in?
The term Storage Class Memory encompasses a number of solid-state storage media types researched starting more than a decade ago. These media vary widely in their fundamental physics, structure, and properties, but all seek to improve in one or more characteristics on legacy flash memory and DRAM. A few SCM types have been commercialized. Two stand out due to superior density and cost versus DRAM, combined with faster access versus legacy NAND flash: 3D XPoint memory and Z-NAND flash memory.
3D XPoint memory developed by Micron and Intel is a novel media available in NVMe SSDs today, and in the future in Persistent Memory attached to CPU memory buses. Samsung’s Z-NAND flash memory is derived from its legacy 3D NAND flash media, but delivers SCM-class performance and endurance, available in NVMe SSDs.
We at HPE believe that future storage arrays will support SCM and NVMe to make the most of storage technology evolution. Relative to a typical flash SSD, reads from an SCM SSD will complete roughly 10x faster at low to moderate utilization and tolerate 10x more write cycles before wear out, but may be 10x more expensive per gigabyte. Given the large difference in price and performance, it is more beneficial in early generations to combine flash and SCM SSDs such that flash is used for durable storage and SCM is used to cache frequently accessed data and metadata. This reduces read access times for hybrid flash and SCM systems significantly versus pure flash systems. As the cost of SCM media falls, we expect the industry will increasingly use it for durable storage as well.