Archive for March, 2014

Impacts of LTE on PTN Mobile Backhaul

Author: Babak Samimi

While carriers worldwide are embracing the new 4G/LTE era, PTN, the mobile backhaul technology, is in need of essential upgrades to address complex networking challenges. Some Network Diagram LTE Backhaulof the challenges might be big enough to spark a PTN technology revolution.

Carriers are moving to LTE for its much faster data rate to cope with ever-increasing mobile data traffic. So it’s no surprise that the backhaul network needs to scale up in capacity and performance to match LTE. With multiple simultaneous technology inflection points from radio to backhaul, the complexities introduced to address these needs are opening doors for innovation.

Read more »

Solving the Cloud Data Center Storage-at-Scale Problem

Author: Dave Berry

In 2011, Andy Bechtolsheim highlighted the need to think about TCO with a famous economics quote, “Over the long term, absent of other barriers, economics always win.” Andy,Data Center Blueprint Open Compute of course, is a Silicon Valley legend, and talking economics provided insight into his total approach to innovation. The analogy clearly applies in the data center for storage as the explosion of Big Data arrives.

Data centers deploying storage at scale for workloads like Hadoop Big Data Analytics or OpenStack Infrastructure as a Service (IaaS) need extreme capacity and performance/$ that a common 8-port HBA or adapter just can’t deliver. To get there, you need to redefine how a rack can be architected.

Read more »

Transitioning SSDs to LDPC Error Correction Codes

Author: Stephen Bates

The Transition

I’m sure many of you readiStorage_title_imageng this blog are aware there is a transition occurring in terms of the type of Error Correction Codes (ECCs) being used inside SSD controller chips. Traditionally Bose-Chaudhuri-Hocquenghem (BCH) were used, and they were more than adequate for large geometry NAND flash. However, the demand for cheaper and denser NAND flash means that BCH is no longer adequate and, in the search for alternatives, most of us are settling on Low Density Parity Check (LDPC) codes.

In this post, I want to talk a little about what this transition means and some implications it has for something we at PMC term Software Defined Flash. For more background on what an LDPC code is, check out Kent Smith’s great post.

Read more »

What is OTN Switching?

Author: Babak SamimiStorage_title_image

We’re constantly hearing about the phenomenal growth in big data and the resulting increase in traffic on carrier networks worldwide. For example. this interesting infographic by Qmee captures 60 seconds of online traffic in 2013, and the stats are amazing: 350GB of data uploaded to Facebook, two million Google searches, 204 million emails sent, 278,000 tweets—and a whole lot more—every single minute.

Optical network operators have the tremendous challenge of re-architecting their networks to 100G to keep up with this massive traffic growth and doing so profitably.Read more »

Building the 100G OTN Ecosystem

Author: Babak SamimiStorage_title_image

As the optical industry gathers to talk about the future of optical networking at OFC 2014 this week, Acacia Communications and PMC announced a major milestone for the 100G OTN ecosystem.

We’ve achieved successful interoperability between our DIGI 120G OTN Processor and Acacia’s AC100 100G Coherent module, which is important step to show that the ecosystem is ready for the 100G transition.

According to Cisco, big data continues to fuel traffic growth of more than 60% per year in metro networks. As a result, service providers are looking for ways to cost effectively increase optical network capacity. 100G Coherent technology allows transmission of 100Gb/s per lambda over existing fiber plant previously installed for 10G, unlocking a ten-fold increase in fiber capacity and eliminating the need for new fiber.

Read more »