Jim Handy

SSDs Need Controllers with More, NO! Less Power

More Power-Less PowerThe Storage Developer Conference in September gave a rare glimpse into two very different directions that SSD architectures are pursuing.  While some of the conference’s presentations touted SSDs with increasing processing power (Eideticom, NGD, Samsung, and ScaleFlux) other presentations advocated moving processing power out of the SSD and into the host server (Alibaba, CNEX, and Western Digital).

Why would either of these make sense?

A standard SSD has a very high internal bandwidth that encounters a bottleneck as data is forced through a narrower interface.  It’s easy to see that an SSD with 20+ NAND chips, each with an 8-bit interface, could access all 160 bits simultaneously.  Since there’s already a processor inside the  SSD, why not open it to external programming so that it can perform certain tasks within the SSD itself and harness all of that bandwidth?

Example tasks would include Continue reading

Storage Visions Conference Coming Oct 22

Once again The SSD Guy will be playing a part in the annual Storage Visions conference which has been moved this year to the Santa Clara Hyatt Hotel adjacent to the Santa Clara Convention Center.  It’s now a 2-day conference (October 22-23) and has an agenda packed with interesting subjects, speakers, and panelists.

Storage Visions’ mission is to bring together the vendors, end users, researchers and visionaries that will meet growing demand for digital storage for the “coming data tsunami.”

I will moderate a panel on an exciting new technology that is currently known by a few different names, including “In-Situ Processing,” “Computational Storage,” and “Intelligent SSDs” (iSSD).  It’s a kind of SSD that uses internal processing to reduce the amount of data traffic between the server and storage.  This helps get past an issue that plagues many applications which spend more time and energy moving data back and forth than they do actually processing that data.

The panel, at 8:15 Monday morning, October 22, is Continue reading

Podcast: Flash Memory Summit

GreybeardsThose of you who enjoy listening to podcasts may want to hear Ray Lucchesi (Silverton Consulting) and Howard Marks (Deep Storage) interview me for their series “Greybeards on Storage.”

This interview is their 70th episode covering the world of storage.  These guys do a fantastic job of probing this industry with great enthusiasm and insight.

This episode is a 42-minute compendium of the sights and goings-on at last August’s Flash Memory Summit along with a number of side trips into the world of SSDs and memory chips.  It’s not strictly structured, and not strictly serious, but just three industry insiders having a lot of fun sharing their observations.

Some of the broad range of subjects that we Continue reading

The Micron QLC SSD – No Surprises Here

Progression of SSDsLast Monday, May 21, Micron introduced the industry’s first QLC SSD for enterprise applications.  Micron’s press release is HERE.

Although this is a laudatory feat, the industry has been headed in this direction for a number of years.  In fact, this was the subject of a presentation that I made to the Storage Networking Industry Association (SNIA) during its Winter Symposium in January 2014.

The slide in which I discussed this appears as this post’s graphic.  (Click on it to see a larger rendition.)  This table attempted to illustrate that all SSDs were headed towards TLC (and implicitly QLC) over the long term despite the fact that naysayers persistently argued that this could never happen.  It looks at attitudes over history and considers the fact that things that the industry said could “Never” happen ended up eventually becoming the mainstream technology.

Since I live, eat, and breathe Continue reading

New Approach to Portable Storage

Blood DriveAccording to confidential information disclosed to The SSD Guy, the US military has made several advancements in a novel approach to provide soldiers, sailors, and aviators with portable storage that cannot be lost or stolen.

Consider the difficulty faced by the armed forces: Confidential information is now a part of every enlisted person’s mission, yet that data, if stored on an external HDD, USB flash drive, or flash card, could fall into the hands of an adversary.  How can the military prevent this from happening?

The solution is ingeniously simple.  Iron in any form can be magnetized, and magnetization is the most common of all ways to store data bits: It’s used in tape and hard drives, which, combined, account for more than 90% of all data storage today.

The human body has plenty of iron, traveling though its veins in the blood stream.

The military’s approach is to magnetize the Continue reading

Kaminario Adopts Software-Only Business Model

Jay KramerKaminario recently decided to adopt a “software-centric” business model, rather than sell all-flash arrays as the company has done since its inception.  The company says that this will allow it “to streamline operations, while focusing its resources on continued software innovation,” acknowledging that the change: “represents a strategic business model shift for Kaminario.”

Hardware support for existing and future Kaminario customers will be provided by Tech Data, which Kaminario’s release tells us is the world-leading end-to-end distributor of technology products, services, and solutions.

Jay Kramer of Network Storage Advisors, a friend of The SSD Guy recently provided me with some valuable insights on Kaminario’s restructuring and has allowed me to share them here.  Jay is a recognized technology consultant specializing in the network storage industry.

Here’s what Jay has to say Continue reading

NVDIMM Report Now Available

I am proud to share the release of a new Objective Analysis report detailing the nonvolatile dual inline memory module (NVDIMM) market.  Titled: “Profiting from the NVDIMM Market,” this report explains the What, How, Why, & When of NVDIMMs, and forecasts the market through 2021.

Readers are aware that I have been watching this market for some time, and never really know whether I should post about NVDIMMs in The SSD Guy or in The Memory Guy, since the boundary between memory and storage is bridged by these products.  My solution: publish posts about this report in both blogs!

According to the Objective Analysis NVDIMM market model the NVDIMM market can be expected to reach nearly 12 million units by 2021, representing a 105% average annual growth rate.  The forecast methodology used for this model has provided some of the semiconductor business’ most consistently-accurate forecasts.  The report, which includes this forecast, was the result of thorough research into the technology and the circumstances that led to the introduction of NVDIMMs, NVDIMM vendor and user interviews, and briefings from those standards bodies that are diligently working to provide timely support for this new technology.

This in-depth 80-page analysis explores the Continue reading

WDC: No SSD/HDD Crossover

WDC HDD vs NAND Price per GB 10X GapThose who have been reading posts on The SSD Guy blog for some time have often heard me explain that SSD prices will not fall below HDD prices anytime soon.  Last week Western Digital shared a roadmap that shows that we can expect for there to be a sizeable price gap between the two technologies at least through 2028.

Let me stop for a moment to point out that Western Digital Corp, or WDC, no longer has any reason to take sides in the HDD vs. SSD battle now that the company has acquired SanDisk, a leading SSD maker.  Even before that, WDC’s HGST business has been the market leader in SAS SSDs for a number of years.  WDC doesn’t take sides in arguments about SSDs vs. HDDs.  Instead the company stands ready to sell whichever one the customer finally decides to use.

This post’s graphic comes from a chart that WDC used on October 11 when introducing its new MAMR head technology, which the company expects to propel HDD capacities up, and HDD price per terabyte down, for a number of years.  To create this chart WDC’s HDD team joined forces with the SanDisk flash team to project both HDD and NAND price per terabyte for the next 11 years.  The most important conclusion is that Continue reading

Comparing SSDs to Tomatoes

TomatoA few years ago The SSD Guy posted an analogy that Intel’s Jim Pappas uses to illustrate the latency differences between DRAM, an SSD, and an HDD.  If we look at DRAM latency to be a single heartbeat, then what happens when we scale that timing up to represent SSDs and HDDs?  How many heartbeats would it take to access either one, and what could you do in that time?

I still think it’s a pretty interesting way to make all these latency differences easier to understand.

Just recently I learned of a Rich Report video of a 2015 presentation in which Micron’s Ryan Baxter uses a different and equally interesting analogy based on tomatoes.

Tomatoes aren’t the first thing that comes to my mind when I think about SSDs, but this video may change my way of thinking!

The tomato slide, 9:30 into the presentation, is Continue reading

Getting the Most from Data Center SSDs

2017-09-19 Calypso Real World Workload TestMy friend and associate Eden Kim of Calypso Systems has published a new white paper on real workloads for SSDs.

This is the company that has helped the Storage Networking Industry Association (SNIA) to develop performance tests for SSDs that get past the issues that plague SSD users: Yes, it does well when it’s new, but how will an SSD perform after a year or two of service?

Calypso has recently published a new White Paper entitled: Datacenter Server Real World Workloads.  This document analyzes real-life datacenter server workloads and performance to provide important insight into how an SSD might perform in actual environments rather than in synthesized workloads.  It compares data center class SSDs against SAS HDDs to take a lot of the guessing out of issues about IOPS requirements, endurance needs, and so forth by comparing the measured activity over 24 hours of a 2,000-outlet retail chain web portal running SQL.

The tests in the paper represent a Continue reading