In the past articles we’ve talked about doing distance extension for SANs, focusing first on building the physical elements that are required, before moving on to how Fibre Channel can be extended using buffer credits.
In this article we’re going to talk about how it is best to think of extending Fibre Channel over Ethernet (FCoE) SANs (finally!).
I know, I know, I start off this whole shebang by saying I’m going to talk about FCoE and distance, and it takes me this long to get to it? Sheesh! Read More »
Tags: distance, FCoE, Fibre Channel, Storage
In the previous article we looked at some of the physical characteristics of building a SAN extension. In other words, we looked at the different ways there are to “build the pipe.” We didn’t, however, get the chance to talk about the speed or capacity of the pipes, nor did we talk about the various methods to fill the pipe with SAN data.
In this article, we’re going to look at the first of four specific methods of how we can extend SANs across distances using those pipes: “Native” Fibre Channel (FC). Understanding how FC works becomes critical for understanding how distance solutions are resolved using the technology, and that in turn leads us to understand how something like Fibre Channel over Ethernet (FCoE) differs.
Afterwards, we’ll take a brief look at how the pieces fit together and are part of the process for building a strong solution. Read More »
Tags: distance, FC, FCoE, Fibre Channel, Storage
In the last article, we looked at the big picture of what is involved in creating a SAN distance extension. In this article, we’re going to take a slightly closer look at the physical requirements and with luck we’ll be able to clear up some general confusion and misconceptions along the way.
There is a lot of information about these different elements available via a quick search on your favorite search engine. What I find, though, is that there is usually very little context that accompanies the descriptions or, at best, the authors assume that you may have more of an understanding about some of these technologies than you do. In this case, if I’m going to err it will likely be on the side of making it too accessible and in Plain English, which is something I can live with.
As usual, this is a mid-level view. There are many deep dives that will go into each subject in fine-toothed detail available on the web, but we’re going to stay focused on what you need to know for extending SANs across distances.
Again, this is a rather long post, but hopefully it will be useful as a reference point for you. Read More »
Tags: distance, FCIP, FCoE, Fibre Channel, iSCSI, Optics, Storage, xWDM
A long time ago I got asked to write about how to use Fibre Channel over Ethernet (FCoE) for distance. After all, we were getting the same question over and over:
What is the distance limitation for FCoE?
Now, the short answer for this can be checking out various data sheets for the Nexus 2000, Nexus 5500, Nexus 6000, Nexus 7000, or MDS 9X00 product lines. But it didn’t answer the most obvious follow-up questions: “Why?” and “How?”
Problem is, whenever you start talking about extending your storage connectivity over distance, there are many things to consider, including some things that many storage administrators (or architects) may not always remember to think about. The more I thought about this (and the longer it took to write down the answers), the more I realized that there needed to be a good explanation for how this worked.
Generally speaking, the propeller spins the ‘other way’ when it comes to storage distance.
To that end, I began writing down the things that affect the choice for selecting a distance solution, which involves more than just a storage protocol. And so the story grew. And grew. And then grew some more. And if you’ve ever read any blogs I’ve written on the Cisco site you’ll know I’m not known for my brevity to begin with! So, bookmark this article as a reference instead of general “light reading,” and with luck things will be clearer than when we started. Read More »
Tags: distance, FCIP, FCoE, Fibre Channel, iSCSI, MDS, nexus, Storage
As a part of my job here at Cisco, I have the opportunity to meet with a range of customers in schools, colleges, and universities across the globe. They have the wide and vast responsibility of educating students, preparing the workforce of the future, equipping students with different kinds of skills so that they can compete in the 21st century, ensuring that students are safe and secure, and a whole host of other responsibilities that will enable students to be productive and successful members of society. Most critically, they have to do all this with increasingly constrained, and in developing nations, often non-existent, budgets.
The requirements for education have shifted over time as we have become more globalized, technologically advanced, and demographically different. On average, people in the US change jobs about ten times before they’re 42. In China and India, there is a massive demand for higher education. And teachers are retiring in record numbers as the population of kids under the age of 15 has reached 1.8 billion.
Thomas Friedman has said that students today need to be special, specialized, anchored, or adaptable. Not everyone can be special, and certain components of traditionally anchored jobs (for example, hairdressers, restaurant workers, and trade workers) can be outsourced. This leaves jobs for which people need to be specialized or adaptable. And this is where education is critical: students have to be able to access education that provides them with the specialization required to help them differentiate the value that they provide. Think, tax planning for customers with major offshore assets, or biological technicians who are creating a biosphere in pace. Or, education has to be able to provide them with the ability to obtain lifelong learning programs and capabilities to adapt to a broad range of careers and jobs that they will have over their lifetimes.
Existing systems on their own will no longer be able to meet the growing and changing demands for learning. Educational institutions must necessarily deliver learning differently, and this is where technology can help. Today, Cisco is partnering with educators to create what we call The Learning Society: a new way of thinking that harnesses the power of technology to help transform learning and allow people to learn anywhere, anytime, on any device.
Not only does Cisco offer a change model that integrates “best-of-the-best” research findings to help students flourish in the 21st century – wherever they are and whatever their culture or socio-economic status, or the economic situation of their country, may be (Education 3.0), but it also details the integration of innovative pedagogy, curriculum, and assessment strategies across whole systems—accommodating learner differences, linking learning to the real world, and setting high, yet realistic, expectations for every student. We encourage you to learn more by joining our Virtual Forum for Education Leaders on April 28th.
Tags: 21st century skills, 3.0, collaboration, cost, cost-savings, distance, education, efficiency, increasing access, learning, lifelong learning, preparing students for the future, savings