Communications in the Enterprise: Regaining Control
Employees are using many other means than email to communicate including text and Skype, presenting challenges for IT teams.
Worth Reading: Discovering Issues with HTTP/2
A while ago I found an interesting analysis of HTTP/2 behavior under adverse network conditions. Not surprisingly:
When there is packet loss on the network, congestion controls at the TCP layer will throttle the HTTP/2 streams that are multiplexed within fewer TCP connections. Additionally, because of TCP retry logic, packet loss affecting a single TCP connection will simultaneously impact several HTTP/2 streams while retries occur. In other words, head-of-line blocking has effectively moved from layer 7 of the network stack down to layer 4.
What exactly did anyone expect? We discovered the same problems running TCP/IP over SSH a long while ago, but then too many people insist on ignoring history and learning from their own experience.
Popular is cheaper: curtailing memory costs in interactive analytics engines
Popular is cheaper: curtailing memory costs in interactive analytics engines Ghosh et al., EuroSys’18
(If you don’t have ACM Digital Library access, the paper can be accessed either by following the link above directly from The Morning Paper blog site).
We’re sticking with the optimisation of data analytics today, but at the other end of the spectrum to the work on smart arrays that we looked at yesterday. Getafix (extra points for the Asterix-inspired name, especially as it works with Yahoo!’s Druid cluster) is aimed at reducing the memory costs for large-scale in-memory data analytics, without degrading performance of course. It does this through an intelligent placement strategy that decides on replication level and data placement for data segments based on the changing popularity of those segments over time. Experiments with workloads from Yahoo!’s production Druid cluster that Getafix can reduce memory footprint by 1.45-2.15x while maintaining comparable average and tail latencies. If you translate that into a public cloud setting, and assuming a 100TB hot dataset size — a conservative estimate in the Yahoo! case — we’re looking at savings on the order of $10M per year.
Real-time analytics is projected to Continue reading
Schneider Electric Saves $60K Using Cohesity SD-Storage
Cohesity’s technology helped Schneider Electric eliminate its reliance on legacy backup and shift to a hybrid cloud approach.
DockerCon Guest Speaker: Liberty Mutual
In yesterday’s DockerCon keynote, Eric Drobisewski, Senior Architect at Liberty Mutual Insurance, shared how Docker Enterprise Edition has been a foundational technology for their digital transformation.
If you missed it, the replay of the keynote is available below:
Turning Disruption into Opportunities
Liberty Mutual – the 3rd largest property and casualty insurance provider in the United States – recognizes that the new digital economy is bringing a faster cycle of technology evolution. Disruptive technologies like autonomous vehicles and smart homes are changing the way customers interact and transact. Liberty Mutual sees these as opportunities to bring new services to market and ways to reinvent traditional insurance models, but they needed to become more flexible and agile while managing their technical debt.
Rapid Expansion of Docker EE
As a 106-year old company, Liberty Mutual recognized that they were not going to become agile overnight. Liberty Mutual has instead built a “multi-lane highway” that enables both traditional apps and new microservices apps to modernize at different speeds according to their needs, all based on Docker Enterprise Edition.
“(Docker Enterprise Edition) began to open multiple paths for our teams to modernize traditional applications and move them to the cloud in a Continue reading
Is Kubernetes Ready to Replace OpenStack and VMware?
CNCF Executive Director Dan Kohn said the group is focused during the second-half of this year on seeing if Kubernetes can take on a greater role in shaping the future of cloud architecture.
Open Source Serverless Frameworks on Docker EE
Since the advent of AWS Lambda in 2014, the Function as a Service (FaaS) programming paradigm has gained a lot of traction in the cloud community. At first, only large cloud providers such as AWS Lambda, Google Cloud Functions or Azure Functions provided such services with a pay-per-invocation model, but since then interest has increased for developers and entreprises to build their own solutions on an open source model.
The maturation of container platforms such as Docker EE has made this process even easier, resulting in a number of competing frameworks in this space. We have identified at least 9 different frameworks*. In this study, we start with the following six: OpenFaaS, nuclio, Gestalt, Riff, Fn and OpenWhisk. You can find an introduction (including slides and videos) to some of these frameworks in this blog post from the last DockerCon Europe.
These frameworks vary a lot in feature set, but can be generalized as having several key elements shown in the following diagram, from the Serverless Architecture from CNCF Serverless Working Group whitepaper:
- Event sources – trigger or stream events into one or more function instances
- Function instances – a single function/microservice, that can be Continue reading
IPv6 Buzz 002: SDN And IPv6 With Tim Martin
IPv6 Buzz is back with a new episode on how SDN could change how we think about the role IPv6 plays in the enterprise. Our guest is Tim Martin.IPv6 Buzz 002: SDN And IPv6 With Tim Martin
IPv6 Buzz is back with a new episode on how SDN could change how we think about the role IPv6 plays in the enterprise. Our guest is Tim Martin.
The post IPv6 Buzz 002: SDN And IPv6 With Tim Martin appeared first on Packet Pushers.
What Data Deluge In Life Sciences Means For Exascale And Clouds
There is no shortage of data in the life sciences. Every talk about bioinformatics and genomics has to include the now ubiquitous hockey stick growth graph of digital DNA. …
What Data Deluge In Life Sciences Means For Exascale And Clouds was written by James Cuff at .
Cloud Provider Embraces NVMesh To Lower Storage Latencies
For the past several years, Teuto.net, a small public and private cloud provider in Germany, has used the open source Ceph software as the backbone of its storage infrastructure. …
Cloud Provider Embraces NVMesh To Lower Storage Latencies was written by Jeffrey Burt at .
VRF route leaking: time to get a little more social!
Virtual Routing and Forwarding (VRF) is a ubiquitous concept in networking, first introduced in the late 1990s as the control and data plane mechanism to provide traffic isolation at layer 3 over a shared network infrastructure. VRF for Linux is an excellent blog that describes the technology behind VRFs, especially as it pertains to the Linux kernel. With the introduction of support for leaking of routes, VRFs get to enjoy their isolation while also having the nous to mix and mingle.
Wait, aren’t VRFs meant to be completely isolated?
You have a valid question there. That was certainly the initial use case for VRFs. Each VRF was intended to represent a customer of a service provider and isolation was a fundamental tenet. Each VRF had its own routing protocol sessions and IPv4 and IPv6 routing tables and route computation as well as packet forwarding was independent from other VRFs. All communication stayed within the VRF other than specific scenarios such as reaching the Internet. Hershey’s wouldn’t want to get too chatty with Lindt, right? No, VRFs weren’t meant to be gregarious.
As VRFs moved outside the realm of the service provider and started finding application elsewhere, such as in the Continue reading
Check Out Our New Software Testing Course – Software Testing QA: A Comprehensive Overview
Instructor: Justin Spears
Course Duration: 1hr 45min
About the Course
The modern accessibility of public, private and hybrid cloud environments has led rise to a bastion of cloud-centric practices. One of the most notable is the idea of QA and Testing in the cloud. This course will describe the concepts, methodologies and implementations of testing in a cloud environment. We will go through the full software QA lifecycle and describe where and how each component of that lifecycle can be offloaded into the cloud and further describe methods and mechanisms on how to do so effectively.
Red Hat Single Sign-on Integration with Ansible Tower
As you might know, Red Hat Ansible Tower supports SAML authentication (both N and Z) by default. This document will guide you through the steps for configuring both products to delegate the authentication to RHSSO/Keycloak (Red Hat Single Sign-On).
Requirements:
- A running RHSSO/Keycloak instance
- Ansible Tower
- Admin rights for both
- DNS resolution
Hands-On Lab
Unless you have your own certificate already, the first step will be to create one. To do so, execute the following command:
openssl req -new -x509 -days 365 -nodes -out saml.crt -keyout saml.key
Now we need to create the Ansible Tower Realm on the RHSSO platform. Go to the "Select Realm" drop-down and click on "Add new realm":
Once created, go to the "Keys" tab and delete all certificates, keys, etc. that were created by default.
Now that we have a clean realm, let's populate it with the appropriate information. Click on "Add Keystore" in the upper right corner and click on RSA:
Click on Save and create your Ansible Tower client information. It is recommend to start with the Tower configuration so that you can inject the metadata file and customize a few of the fields.
Log in as the admin user Continue reading
Huawei and InfoVista Partner to Improve SD-WAN User Experience
InfoVista’s VNF will be added to Huawei’s open SD-WAN service to support application monitoring and delivery capabilities, WAN optimization, and analytics.
New ‘Lazy FPU’ Chip Flaw Hits Intel Processors
Similar to the earlier Spectre and Meltdown bugs the new security flaw could allow access to sensitive data through a side channel. Intel ranks it as a “moderate” vulnerability.
Citrix’s Karl Brown Discusses the Importance of Real-Time and Dynamic Applications in Managed SD-WAN
In this interview, Karl Brown, senior director of product management for the Citrix NetScaler SD-WAN platform, talks about Citrix’s approach to SD-WAN.