Having Fun at Queue Depth = 1: What Next Generation Non Volatile Memory (NG-NVM) means for PCIe SSDs and SSD Drivers

November 12, 2015

Author: Stephen Bates (@stepbates)

Update – 26 Nov 2015 – Well things can move very fast in the Linux world when they want to! Since I wrote this article an improved, but still pre-production, version of the polling code for the block layer and NVMe driver have made it into the Linux kernel and will go mainline in 4.4. There is a really nice overview of how it works here and Jens’ patch-set comments and some of his testing results can be found here. It is worth stressing that the results we present should only improve as the polling mode evolves. Stay tuned for updated performance results in due course!

Introduction

I love SSDs! They have transformed the data center by providing high-performance, low latency access to storage. Low latency is transforming the data center stack. I will be digging into latency in my next few blog posts, starting with Driver latency here.

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Unlocking the Benefits of C-RAN with OTN Mobile Fronthaul

October 28, 2015

Author: Scott Wakelin

Ever since 1987, players from the winning Super Bowl team have been asked the question, “You’ve just won the Super Bowl, what are you going to do next?”  They respond, “I’m going to Disney World!”  This led me to wonder how the U.S. Treasury would answer the same question after the conclusion of the latest AWS-3 auction in which Mobile Network Operators bid almost $45B to secure new licenses – a number that easily surpassed analysts’ estimates of between $10B and $20B.

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What’s Hot in Storage? NVMe over Fabrics, SMR, PMEM and more! Highlights from SNIA’s Storage Developer Conference 2015

October 2, 2015

Author: Stephen Bates (@stepbates)

Introduction

Last week I had the opportunity to attend and present at SNIA’s Storage Developer Conference (SDC). This great technical conference is organized by storage developers for storage developers. SNIA asked me for a commendation for this conference and my reply was:

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Adaptec HBA and RAID Compatibility Reports add HGST Helium HDDs

August 21, 2015

Author: Jeremiah TusseyPMC Adaptec 8805 RAID Adapter

Drive vendors continue to innovate, and one interesting new concept is the Helium hard disc drive, announced by HGST, a Western Digital Company. The important thing to note about Helium drive technology is that the drives are filled with Helium, allowing denser and more efficient drive designs. Helium is much lighter than air, so it imposes less drag on spinning disks, allowing disk platters to be stacked closer together. For enterprise applications, this allows more capacity without adding a more complex implementation via Shingled Magnetic Recording (SMR). This provides an advantage of increased capacity that can be added into an enterprise ecosystem without any extra work or driver support. Additionally, this advancement will lead to even more capacity with the upcoming integration of SMR.

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Flash Memory Summit 2015 Special – NVM Express + RDMA = AWESOME!

August 11, 2015

Author: Stephen Bates (@stepbates)

Introduction

In previous blog posts I have discussed Project Donard, which implements PCIe peer-to-peer transfers between NVM Express (NVMe) SSDs and GPUs, as wells as NVMe SSDs and Remote Direct Memory Access (RDMA) NICs. I am super-excited to announce that at Flash Memory Summit 2015 (FMS) we have been working with Mellanox, a pioneer of RDMA, to take this work to the next level! This blog post will dig a little deeper into what we are demoing at FMS, August 11-13, and how NVM Express + RDMA = AWESOME!

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Why Management is Critical for Data Center Lifecycle Management

August 7, 2015

Author: Dave BerryPMC Data Centers

A key tenant of cloud computing is that it’s an easy-to-deploy and manage infrastructure. Automating the management lowers costs and complexity when new infrastructure is deployed or changes need to take place.  Historically, the industry has deployed armies of administrators across the deployment lifecycle to make that happen, but that’s no longer practical or even necessary.

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Re-imagining Storage with Non-Volatile Memory

July 28, 2015

Author: Edward Sharp

word cloud“May you live in interesting times.” If you haven’t noticed, IT is already there, with cloud, mobile, big data, in-memory, NoSQL, Remote Direct Memory Access (RDMA), Shingled Magnetic Recording (SMR) drives, Non-Volatile Memory (NVM), and the list goes on. Our landscape is undergoing massive disruption as new technologies and techniques enable customers to do more with less. This disruption is a threat to existing businesses, and an opportunity for the fast, the focused, and the bold.

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What A Difference A Bay Makes

July 8, 2015

Author: Neil Cameron

I did this test several years ago to show (a) how ridiculously expensive full-blown SSD servers were and (b) how little more you actually paid for maxCache. So I thought I’d have a go at it again based on current prices from the web (these are all $AUD based on websites from shopbot.com.au).Server Rack Cluster

I picked, as an example, a database server. I have 8-bay and 16-bay servers, and I’ve done some very rough calculations based on capacities of the drives. Note that the drive capacities won’t be spot on as you don’t get what you pay for, but I don’t know exactly what the real capacities are for these drives so didn’t worry about that part of the calculation.

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