Test Web Page Load Time with a Free Chrome Extension
A walk-through shows you how to use a free Chrome extension to measure web page loading times.
Infrastructure-as-Code Tools
This is the fourth blog post in “thinking out loud while preparing Network Infrastructure as Code presentation for the network automation course” series. Previous posts: Network-Infrastructure-as-Code Is Nothing New, Adjusting System State and NETCONF versus REST API.
Dmitri Kalintsev sent me a nice description on how some popular Infrastructure-as-Code (IaC) tools solve the challenges I described in The CRUD Hell section of Infrastructure-as-Code, NETCONF and REST API blog post:
Read more ...The design and implementation of modern column-oriented database systems
The design and implementation of modern column-oriented database systems Abadi et al., Foundations and trends in databases, 2012
I came here by following the references in the Smoke paper we looked at earlier this week. “The design and implementation of modern column-oriented database systems” is a longer piece at 87 pages, but it’s good value-for-time. What we have here is a very readable overview of the key techniques behind column stores.
What is a column store?
Column stores are relational databases that store data by column rather than by row. Whereas a traditional row-based store stores all attributes of one row together, followed by the attributes of the next row, and so on, a column-based stored uses one logical file per attribute (column). The column-oriented layout makes it efficient to read just the columns you need for a query, without pulling in lots of redundant data.
Data for a column may be stored in an array with implicit ids (a), or in some format with explicit ids (b).
Since data transfer costs from storage (or through a storage hierarchy) are often the major performance bottlenecks in database systems, while at the same time database schemas are becoming more and Continue reading
Measuring the KSK Roll
It has been a trade-off between waiting long enough to have the key sentinel mechanism deployed in sufficient volume in resolvers to generate statistically valid outcomes and yet start this measurement prior to the planned roll of the KSK on 11th October 2018. These are early results, and reflect less than one week of measurement, but some strong signals are evident in the data.Forging A Hybrid CPU-FPGA Supercomputer
It is hard to say for sure, but a very substantial part of the hard work in buying supercomputers and creating simulations and models that tell us about the real world around us gets done in thousands of academic research institutions worldwide. …
Forging A Hybrid CPU-FPGA Supercomputer was written by Timothy Prickett Morgan at .
Intel Kicks FPGA Performance Up a Notch With Stratix 10 PAC
Intel is gearing up the FPGA user base it inherited from Altera for the release of Stratix 10 hardware and companion application acceleration stack. …
Intel Kicks FPGA Performance Up a Notch With Stratix 10 PAC was written by Nicole Hemsoth at .
HPE Selects Intel Programmable Card for Data Center Servers
HPE is the first original equipment manufacturer to incorporate the programmable card into its devices.
Microsoft Office 365
This information is extremely useful, allowing traffic analytics software to combine telemetry obtained from network devices with information obtained using the Microsoft REST API in order to identifying clients, links, and devices carrying the traffic, as well as any issues, such as link errors, and congestion, that may be impacting performance.
var api = 'https://endpoints.office.com/endpoints/worldwide';
function uuidv4() {
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
var r = Math.random() * 16 | 0, v = c == 'x' ? r : (r & 0x3 | 0x8);
return v.toString(16);
});
}
var reqid = uuidv4();
function updateAddressMap() {
var res, i, ips, id, groups;
try { res = http(api+'?clientrequestid='+reqid); }
catch(e) { logWarning('request failed ' + e); }
if(res == null) return;
res = JSON.parse(res);
groups Continue reading
Vodafone, China Mobile Tap ONAP for Broader Network Orchestration
The CCVPN use case allows for the orchestration of an operator’s underlying optical transport network and overlay SD-WAN in a way to support the peering of inter-operator VPN service delivery.
VMware, Pivotal Execs Say Google’s On-Prem Kubernetes Validates PKS
The competitive landscape for managed, on-premises Kubernetes services is becoming increasingly crowded with the likes of Cisco and even Google itself jumping in.
Check Out Our Newest Network Security Course!
We’ve just added a new ISC2 course, The Systems Security Certified Practitioner.
General Outline
The broad spectrum of topics included in the SSCP Common Body of Knowledge ensure its relevancy across all disciplines in the field of information security. Successful candidates are competent in the following 7 domains:
- Access Controls
- Security Operations and Administration
- Risk Identification, Monitoring, and Analysis
- Incident Response and Recovery
- Cryptography
- Network and Communications Security
- Systems and Application Security
About the Course
The Systems Security Certified Practitioner (SSCP) is the ideal certification for those with proven technical skills and practical, hands-on security knowledge in operational IT roles. It provides confirmation of a practitioner’s ability to implement, monitor and administer IT infrastructure in accordance with information security policies and procedures that ensure data confidentiality, integrity and availability.