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Category Archives for "Network World SDN"

The difference between single-core and multi-core performance

In reviewing CPU and server benchmarks, you’ve undoubtedly noticed that testing covers both single-core and multi-core performance. Here's the difference.In terms of raw performance, both are equally important, but single- and multi-core have areas of use where they shine. So when picking a CPU, it’s important to consider your particular workloads and evaluate whether single-core or multi-core best meets your needs.Single-core CPUs There are still a lot of applications out there that are single-core limited, such as many databases (although some, like MySQL, are multicore).Performance is measured in a couple of ways. Clock frequency is the big one; the higher the frequency the faster apps will run. Also important is the width of execution pipelines, and the wider the pipeline, the more work can get done per clock cycle. So even if an app is single threaded, a wider pipeline can improve its performance.To read this article in full, please click here

Using ‘break’ and ‘continue’ to exit loops in bash

The commands for looping in bash are extremely useful. They allow you to run a series of commands as many times as needed to process a large collection of data. The break and continue commands provide another special option. They allow you to exit a loop early or skip the remaining commands in the loop and return to the beginning.Both the break and the continue commands are meant to be used only in for, while and until loops. In fact, if you try to invoke the break command on its own, bash will tell you just that.To read this article in full, please click here

IoT technology is hitting an inflection point for businesses

A new survey released by UK-based research firm Omdia bears out some of the industry’s rosier predictions for IoT uptake among businesses, finding that almost four out of five companies expect to be actively deploying IoT within the next two years.The survey, which was commissioned by IoT connectivity vendor MachineQ and collected responses from more than 200 enterprises in the manufacturing, retail, real estate and construction, healthcare and life sciences industries, also found that 70% of respondents said that they planned to have more than 50,000 IoT devices deployed within the next 24 months.To read this article in full, please click here

Nvidia strikes AI consulting deals with Deloitte, Booz Allen Hamilton

Artificial intelligence (AI) may be all the rage, but it's still slow to be deployed. The learning curve is steep, there are few people with adequate AI experience, and the rules of governance are unclear.That explains Gartner's 2020 statistic that only 53% of AI pilot programs actually make it to deployment. The tools and experience needed are just not there for the average IT shop, especially a smaller enterprise.Nvidia is looking to change that with a pair of AI-related alliances with consulting giants Deloitte and Booz Allen Hamilton. Both deals are designed to help companies plot AI strategies and gain access to Nvidia technology and expertise.To read this article in full, please click here

Broadcom’s VMware acquisition sparks concern

Chip powerhouse Broadcom recently announced its intention to acquire virtualization pioneer VMware for $61 billion. In light of Broadcom’s less than stellar track record with prior acquisitions (CA Technologies in 2018, and Symantec in 2019), VMware’s enterprise customers are understandably worried.“Following the purchases of CA and Symantec, Broadcom raised prices, decreased support, and stopped investing in innovation,” says Tracy Woo, senior analyst for Forrester. “VMware customers would be wise to have an exit plan,” she cautioned.IDC analyst Stephen Elliot sees it differently. Rather than advising VMware customers to identify the exits, Elliot believes customers should “double down” on their relationship with the vendor, moving towards a more strategic business partnership.To read this article in full, please click here

Nvidia GTC: Hopper processor in full production

Nvidia kicked off its second GTC conference of the year with news that its H100 “Hopper” generation of GPUs is in full production, with global partners planning to roll out products and services in October and wide availability in the first quarter of 2023.Hopper features a number of innovations over Ampere, its predecessor architecture introduced in 2020. Most significant is the new Transformer engine. Transformers are widely-used deep learning models and the standard model of choice for natural language processing. Nvidia claims the H100 Transformer Engine can speed up neural networks by as much as six-fold over Ampere without losing accuracy.To read this article in full, please click here

Using the Linux apropos command – even if you have to fix it first

On Linux, the apropos command helps identify commands related to some particular term. It can be helpful in finding commands you might want to use—especially when you can’t remember their names.For example, if you couldn’t remember the command to display a calendar or put your shell to sleep for a short period of time, you could try these commands:$ apropos calendar cal (1) - display a calendar $ apropos sleep sleep (1) - delay for a specified amount of time usleep (1) - sleep some number of microseconds [ Get regularly scheduled insights by signing up for Network World newsletters. ]To read this article in full, please click here

ARM updates Neoverse enterprise processor roadmap

Arm has introduced the next generation of its Neoverse high performance core technology, and Nvidia will be one of the first licensees to offer it out of the gate.Arm introduced the Neoverse N-Series processors for data center use in 2019, along with the Neoverse E-Series for edge computing and the Neoverse V-Series for high performance computing (HPC).For Neoverse V2, Arm is claiming higher per-thread performance at half the power consumption of its x86 competitors. Dermot O’Driscoll, vice president of product solutions at Arm, said on a conference call with journalists that the main aim of V2 is improved performance for cloud and single-thread workloads while balancing power consumption.To read this article in full, please click here

How to configure a standby Azure AD Connect server

Organizations often use Azure AD Connect to maintain the relationship between their on-prem active directory and their Office 365/Azure cloud instance, and when doing this, it’s important that they build in redundancy with business continuity in mind.Recently our organization sought to make two meaningful changes to its sync relationship: set up a non-domain-controller AD Connect server configure the existing sync server as a standby for failover in the event of problems with the primary server [ Get regularly scheduled insights by signing up for Network World newsletters. ]To read this article in full, please click here

Juniper increases flexibility of its data-center automation and assurance platform

Juniper Networks has expanded the features of its Apstra intent-based networking software to include broader configuration and multiprotocol support, and has added a new licensing scheme.The latest version of Apstra includes a feature called Freeform Reference Designs  for designing data-center networks that support any protocol, topology or network domain. Data center reference designs are offered by all major data center players and typically feature validated, repeatable infrastructure system maps on how networked resources are configured.To read this article in full, please click here

How to work on Linux with filenames that contain blanks

Personally, I always try to avoid filenames with blanks, usually by filling those places where less blank-phobic people would use them with underscores or hyphens. The filenames are still easy to decipher, and I don’t have to trouble myself with enclosing them in quotes when I want to use them. As a result, some of my files look like this:locking-accts Lost_World I also rarely add .txt file extensions to the end of text files unless I plan to share them with my Windows system.Use quotes When blanks in file names are preferable for any reason, however, there are several easy ways to work with them. To reference existing files, you can enclose the filenames in single or double quotes. In fact, you can make this easier by starting with a quote mark, typing as much of the filename as needed to differentiate it from other files and then pressing the tab key to initiate filename completion. For example, typing the portion of a filename as shown in the example below and then pressing tab should add the rest of the filename to the “file n” beginning:To read this article in full, please click here

Cisco expands its SD-WAN software for wider reach, better security

Cisco has broadened the scope of Cisco SD-WAN software by growing its reach and security, and expanding its support for deploying multi-region WAN fabric.The idea behind the new features is to help manage the complexity and security of connecting to cloud resources from the edge of the network, said JP Shukla, director, product management, in Cisco’s Enterprise Cloud & SD-WAN group. “They want to connect these users as reliably and securely as these users would be in an office environment,” he said. [ Get regularly scheduled insights by signing up for Network World newsletters. ]To read this article in full, please click here

Nvidia Hopper GPU slays predecessor in ML benchmarks

Nvidia has released performance data for its forthcoming Hopper generation of GPUs, and the initial benchmarks are tremendous.The metrics are based on MLPerf Inference v2.1, an industry-standard benchmark that analyzes the performance of inferencing tasks using a machine-learning model against new data.Nvidia claims its Hopper-based H100 Tensor Core GPUs delivered up to 4.5x greater performance than its previous A100 Ampere GPUs. (Read more about Hopper: Nvidia unveils a new GPU architecture designed for AI data centers) It’s a remarkable jump in just one generation. For comparison, CPU benchmarks often grow 5% to 10% from one generation to the next. To read this article in full, please click here

Wi-Fi 7 test tops 5Gbps using Intel, Broadcom equipment

A test using an Intel-based laptop and a Broadcom-based Wi-Fi 7 access point topped the 5Gbps mark for the first time, according to Intel. The company said this week that the test represents an important milestone in Wi-Fi 7 development.According to Intel, this was the industry’s first cross-vendor Wi-Fi 7 demonstration, which is critical for a standard that will cover equipment produced by a myriad of different vendors, all of which has to work together seamlessly.Wi-Fi 7, also known as 802.11be, introduces a host of new features to the venerable Wi-Fi standard, using the 6GHz spectrum to provide the possibility of much wider—up to 320MHz—channels for vastly increased throughput, multilink operation for much more efficient use of available spectrum, and 4K QAM (quadrature amplitude modulation) data modulation.To read this article in full, please click here

How to copy files to multiple locations on Linux

Using a series of commands to copy a file to multiple locations or a number of files to a single location can be time-consuming, but there are options to speed up the process. This post explains some of them.Multiple commands like these can to copy a single file to a series of directories on your system:$ cp myfile dir1 $ cp myfile dir2 $ cp myfile dir3 One way to make the task easier is typing the first command and then repeat the command by only specifying the needed changes. This method relies on whether the file or directory names are similar enough to substitute only some portion of the names. [ Get regularly scheduled insights by signing up for Network World newsletters. ]To read this article in full, please click here

Cisco plans to predict, solve network problems via SaaS

Two years after it was it was acquire by Cisco, ThousandEyes' intelligent network software is now at the heart of the networking giant’s strategy to predict and fix network problems before they cause trouble.When it bought the compnay, Cisco acquired its cloud-based software package that analyzed everything from performance of local and wide-area networks to ISP, cloud, and collaboration-application performance to the health of the internet. Its cloud, enterprise, and endpoint-agent technology has been integrated in one fashion or another across Cisco’s core product lines such as its Catalyst, Nexus switches, and now that technology is part of Cisco's latest effort: predictive networking.To read this article in full, please click here

Weekly internet health check, US and worldwide

The reliability of services delivered by ISPs, cloud providers and conferencing services (a.k.a. unified communications-as-a-service (UCaaS)) is an indication of how well served businesses are via the internet.ThousandEyes is monitoring how these providers are handling the performance challenges they face. It will provide Network World a roundup of interesting events of the week in the delivery of these services, and Network World will provide a summary here. Stop back next week for another update, and see more details here. Get regularly scheduled insights by signing up for Network World newsletters To read this article in full, please click here

Checking exit codes in bash

There are quite a few exit codes used on Linux systems, though no listing you can display when you’re feeling curious. In fact, you won’t see the numeric codes unless you specifically ask for them.Instead, you will see a textual description of the problem you encountered—such as “No such file or directory”—in a context like this:$ bin/runme bash: bin/runme: No such file or directory [ Get regularly scheduled insights by signing up for Network World newsletters. ] If you want to see the numeric exit code, you can use the echo $? command. The error message will tell you that there is no “runme” script in your bin directory. The echo $? command will respond with only a number.To read this article in full, please click here

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