Category Archives for "Network World SDN"

7 considerations when buying network-automation tools

The concept of network automation has been around for as long as there have been networks, and until now the uptake has been slow for a number of reasons including resistance from network engineers.  But now forces are coming together to create a perfect storm of sorts, driving a need for network automation tools.One factor is that more and more network teams are starting to feel the pain of working in the fast-paced digital world where doing things the old way simply does not work.  The manual, box-by-box, method of configuring and updating routers and switches through a command-line interface (CLI) is too slow and error prone. [Get regularly scheduled insights by signing up for Network World newsletters.] Also, the rise of software-defined networks (SDN), including software-defined WANs (SD-WAN), has enabled network-automation tools to evolve from operationally focused point products that address things like change management and configuration into policy and orchestration tools.To read this article in full, please click here

Liquid cooling and edge computing are featured at Gartner show

Research firm Gartner is holding its IT Infrastructure, Operations, and Cloud Strategies Conference (IOCS) in Las Vegas this week, and a few news announcements from the show give an indication as to where data-center technology is headed.First up, Schneider Electric and Iceotope formally introduced their integrated rack with chassis-based immersive liquid-cooling designs. The deal was announced in October but now the details are out. In addition to Schneider and Iceotope, the alliance also includes Avnet, an electronic-component distributor.To read this article in full, please click here

7 ways to remember Linux commands

Some Linux commands are very easy to remember. The names may have only a couple letters and they often relate directly to what you want to do – like cd for changing directories or pwd for displaying the present working directory. Others can be very difficult to remember, especially if what you want to do relies on using a series of options.So, let’s look at some commands and tricks that can help you remember commands that do just what you need them to do and that make issuing those commands so much easier.Use aliases The best way to nail down a complicated command is to turn it into an alias. Just take a command that works for you and assign it an easy name. In fact, there is nothing wrong with using the name of the command itself as the alias as long as this doesn’t interfere with other ways you might want to use that command. For example, grep and egrep are often aliased to include using color to highlight your search term.To read this article in full, please click here

Passive optical LAN: Its day is dawning

The concept of using passive optical LANs in enterprise campuses has been around for years, but hasn’t taken off because most businesses consider all-fiber networks to be overkill for their needs. I’ve followed this market for the better part of two decades, and now I believe we’re on the cusp of seeing POL go mainstream, starting in certain verticals.The primary driver of change from copper to optical is that the demands on the network have evolved. Every company now considers its network to be business critical where just a few years ago, it was considered best effort in nature.  Downtime or a congested network meant inconvenienced users, but today they mean the business is likely losing big money.To read this article in full, please click here

Breaking Linux files into pieces with the split command

Linux systems provide a very easy-to-use command for breaking files into pieces. This is something that you might need to do prior to uploading your files to some storage site that limits file sizes or emailing them as attachments. To split a file into pieces, you simply use the split command.$ split bigfile By default, the split command uses a very simple naming scheme. The file chunks will be named xaa, xab, xac, etc., and, presumably, if you break up a file that is sufficiently large, you might even get chunks named xza and xzz.[Get regularly scheduled insights by signing up for Network World newsletters.] Unless you ask, the command runs without giving you any feedback. You can, however, use the --verbose option if you would like to see the file chunks as they are being created.To read this article in full, please click here

Seagate doubles HDD performance with multi-actuator technology

Seagate has taken the wraps off its Exos 2X14 enterprise hard drive. It's the first to integrate Seagate's MACH.2 multi-actuator technology, which is a method of turning one hard disk into two and doubling performance.The technology is pretty straightforward. Say you have four platters in a disk drive. The actuator controls the drive heads and moves them all in unison over all four platters. Seagate's multi-actuator makes two independent actuators out of one, so in a six-platter drive, the two actuators cover three platters each. READ MORE: SSD vs. HDD: Choosing between solid-state and hard-disk drivesTo read this article in full, please click here

SD-WAN in 2020: 6 trends to look for

The market for SD-WAN remains white hot with distributed organizations widely deploying the technology to solve WAN bandwidth limitations, provide reliability/resiliency and improve quality of user experience for cloud-based applications.Dozens of suppliers are rapidly innovating and maturing their SD-WAN products with innovations in cloud onramps, support for leading SaaS applications, security and management/automation platforms.[Get regularly scheduled insights by signing up for Network World newsletters.] Here are six top issues to evaluate as SD-WAN moves to its 2.0 phase and beyond during 2020.To read this article in full, please click here

The VPN is dying, long live zero trust

The venerable VPN, which has for decades provided remote workers with a secure tunnel into the enterprise network, is facing extinction as enterprises migrate to a more agile, granular security framework called zero trust, which is better adapted to today’s world of digital business.VPNs are part of a security strategy based on the notion of a network perimeter; trusted employees are on the inside and untrusted employees are on the outside. But that model no longer works in a modern business environment where mobile employees access the network from a variety of inside or outside locations, and where corporate assets reside not behind the walls of an enterprise data center, but in multi-cloud environments.To read this article in full, please click here

Inphi launches DSPs for long-distance 400Gb networking

Inphi, a developer of high-speed data interconnects, announced it has begun sampling its new Canopus coherent digital signal processor (DSP), which it claims reduces power draw by up to 75 percent and triples the throughput of data over fiber networks, especially over long distances.The Canopus processor comes on a plug-in module about the size of a cigarette lighter that goes in existing networking equipment. The chip is built on a 7nm manufacturing process, and its silicon geometry delivers over 75 percent reduction in DSP power dissipation and size as compared to the current generation of coherent DSPs.Coherent optical transmission is a technique for transporting considerably more information through a fiber optic cable, and is especially popular when transporting over long distances. It uses modulation and phases of the light to amplify transmission. A DSP is often needed to manage and clean up the photonics.To read this article in full, please click here

Nvidia quietly unveils faster, lower power Tesla GPU accelerator

Nvidia was all over Supercomputing 19 last week, not surprisingly, and made a lot of news which we will get into later. But overlooked was perhaps the most interesting news of all: a new generation graphics-acceleration card that is faster and way more power efficient.Multiple attendees and news sites spotted it at the show, and Nvidia confirmed to me that this is indeed a new card. Nvidia’s “Volta” generation of Tesla GPU-accelerator cards has been out since 2017, so an upgrade was well overdue.[Get regularly scheduled insights by signing up for Network World newsletters.] The V100S comes only in PCI Express 3 form factor for now but is expected to eventually support Nvidia’s SXM2 interface. SXM is a dual-slot card design by Nvidia that requires no connection to the power supply, unlike the PCIe cards. SXM2 allows the GPU to communicate either with each other or to the CPU through Nvidia’s NVLink, a high-bandwidth, energy-efficient interconnect that can transfer data up to ten times faster than PCIe.To read this article in full, please click here

Displaying dates and times your way in Linux

The date command on Linux systems is very straightforward. You type “date” and the date and time are displayed in a useful way. It includes the day-of-the-week, calendar date, time and time zone:$ date Tue 26 Nov 2019 11:45:11 AM EST As long as your system is configured properly, you’ll see the date and current time along with your time zone.[Get regularly scheduled insights by signing up for Network World newsletters.] The command, however, also offers a lot of options to display date and time information differently. For example, if you want to display dates in the most useful format for sorting, you might want to use a command like this:To read this article in full, please click here

The many faces of awk

If you only use awk when you need to select a specific field from lines of text, you might be missing out on a lot of other services that the command can provide. In this post, we'll look at this simple use along with some of the other things that awk can do for you and provide some examples.Plucking out columns of data The easiest and most commonly used service that awk provides is selecting specific fields from files or from data that is piped to it. With the default of using white space as a field separator, this is very simple.[Get regularly scheduled insights by signing up for Network World newsletters.] $ echo one two three four five | awk ‘{print $4}’ four $ who | awk ‘{print $1}’ jdoe fhenry White space is any sequence of blanks and tabs. In the commands shown above, awk is extracting just the fourth and first fields from the data provided.To read this article in full, please click here

8 ways to prepare your data center for AI’s power draw

As artificial intelligence takes off in enterprise settings, so will data center power usage. AI is many things, but power efficient is not one of them.For data centers running typical enterprise applications, the average power consumption for a rack is around 7 kW. Yet it’s common for AI applications to use more than 30 kW per rack, according to data center organization AFCOM. That’s because AI requires much higher processor utilization, and the processors – especially GPUs – are power hungry. Nvidia GPUs, for example, may run several orders of magnitude faster than a CPU, but they also consume twice as much power per chip. Complicating the issue is that many data centers are already power constrained.To read this article in full, please click here

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