The Serverlist Newsletter: Connecting the Serverless Ecosystem

The Serverlist Newsletter: Connecting the Serverless Ecosystem

Check out our fifth edition of The Serverlist below. Get the latest scoop on the serverless space, get your hands dirty with new developer tutorials, engage in conversations with other serverless developers, and find upcoming meetups and conferences to attend.

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Heavy Networking 451: Intelligent Network Automation And Intent Engineering With Gluware (Sponsored)

On today's Heavy Networking, recorded live at Gluware Intent 19, the Packet Pushers dive into network automation, learn about sponsor Gluware's capability to bring automation into brownfield environments and derive business intent from existing networks, and explore real-world use cases from customers Merck and Terracon.

The post Heavy Networking 451: Intelligent Network Automation And Intent Engineering With Gluware (Sponsored) appeared first on Packet Pushers.

Will Spectrum Hunger Kill Weather Forecasting?

If you are a fan of the work we do each week with our Gestalt IT Rundown on Facebook, you probably saw a story in this week’s episode about the race for 5G spectrum causing some potential problems with weather forecasting. I didn’t have the time to dig into the details behind the story on that episode, so I wanted to take a few minutes and explain why it’s such a big deal.

First, you have to know that 5G (and many other) speeds are entirely dependent upon the amount of spectrum they can use to communicate. The more spectrum available to them, the more channels they have available to communicate. Which increases the speed they can exchange information and reduces the amount of interference between devices. Sounds simple right?

Except mobile devices aren’t the only things that are using the spectrum. We have all kinds of other devices out there that use radio waves to communicate. We’ve known for several years that there are a lot of devices in the 5 GHz spectrum used by 802.11 that interfere with wireless devices. Things like ISM radios for industrial and medical applications or government radar systems. The government has instituted Continue reading

Using Infoblox as a dynamic inventory in Red Hat Ansible Tower

Ansible_and_Infoblox-3

Do you still use spreadsheets to keep track of all your device inventory? Do you have Infoblox Appliances deployed in your infrastructure? Do you want to start automating without the burden of maintaining a static register of devices? If you answered yes to any of these questions, this blog is for you.

Operations teams often struggle to keep their Configuration Management Databases (CMDBs) up-to-date, primarily because they were not involved in the specification process to share what pieces of information are relevant to them, or even if they were, once it is put in place: Teams are not allowed to change any of their Configuration Items (CI) because they have only read-only access!

The reality is that a lot of the time when we talk about a CMDB, we are talking about tables in a database without any version control mechanism, therefore only read access is provided to end users.

The impact is that in order to perform lifecycle management (Create/Update/Decommission) of their configuration items, teams must go through a fastidious and manual process until they give up changing CIs (Configuration Items) in the CMDB and just leave everything as it is. What happens next? Different teams start Continue reading

If You Worry About 768K Day, You’re Probably Doing Something Wrong

A few years ago we “celebrated” 512K day - the size of the full Internet routing table exceeded 512K (for whatever value of K ;) prefixes, overflowing TCAMs in some IP routers and resulting in interesting brownouts.

We’re close to exceeding 768K mark and the beware 768K day blog posts have already started appearing. While you (RFC 2119) SHOULD check the size of your forwarding table and the maximum capabilities of your hardware, the more important question should be “Why do I need 768K forwarding entries if I’m not a Tier-1 provider”

Read more ...

Compress objects, not cache lines: an object-based compressed memory hierarchy

Compress objects, not cache lines: an object-based compressed memory hierarchy Tsai & Sanchez, ASPLOS’19

Last time out we saw how Google have been able to save millions of dollars though memory compression enabled via zswap. One of the important attributes of their design was easy and rapid deployment across an existing fleet. Today’s paper introduces Zippads, which compared to a state of the art compressed memory hierarchy is able to achieve a 1.63x higher compression ratio and improve performance by 17%. The big idea behind zippads is simple and elegant, but the ramifications go deep: all the way down to a modified instruction set (ISA)! So while you probably won’t be using Zippads in practice anytime soon, it’s a wonderful example of what’s possible when you’re prepared to take a fresh look at “the way we’ve always done things.”

The big idea

Existing cache and main memory compression techniques compress data in small fixed-size blocks, typically cache lines. Moreover, they use simple compression algorithms that focus on exploiting redundancy within a block. These techniques work well for scientific programs that are dominated by arrays. However, they are ineffective on object-based programs because objects do not fall neatly Continue reading

Vagrant Libvirt Install CentOS 7

This post will cover the process of installing Vagrant with the libvirt provider on CentOS 7. For reference the following software will be used in this post. CentOS - 7 Vagrant - 2.2.4 Vagrant-libvirt - 0.0.45 System Prep Before we begin, lets ensure the host is updated. cmd sudo yum...

Self Hosted Vagrant Cloud

It is possible to host your own Vagrant "cloud" on premises. You might want to do this to align with your companies security policy and or to host your custom Vagrant boxes. There are a number of methods to serve your Vagrant boxes, in this post I will show you how to build a web server to...

Cisco ties its security/SD-WAN gear with Teridion’s cloud WAN service

Cisco and Teridion have tied the knot to deliver faster enterprise software-defined WAN services.The agreement links Cisco Meraki MX Security/SD-WAN appliances and its Auto VPN technology which lets users quickly bring up and configure secure sessions between branches and data centers with Teridion’s cloud-based WAN service. Teridion’s service promises customers better performance and control over traffic running from remote offices over the public internet to the data center. The service features what Teridion calls “Curated Routing” which fuses WAN acceleration techniques with route optimization to speed traffic.To read this article in full, please click here

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