Among the many challenges ahead for programming in the exascale era is the portability and performance of codes on heterogeneous machines.
Since the future plan for architectures includes new memory and accelerator capabilities, along with advances in general purpose cores, developing on a solid base that offers flexibility and support for many hardware architectures is a priority. Some contend that the best place to start is with C++, which has been gathering steam in HPC in recent years.
As our own Douglas Eadline noted back in January, choosing a programming language for HPC used to be an easy task. Select …
Exascale Code Performance and Portability in the Tune of C was written by Nicole Hemsoth at The Next Platform.
One of my readers sent me interesting feedback after reading my explanation of why I’d try not to use OSPF as a routing protocol between hosts and ToR switches. He said:
Unfortunately we can’t use BGP because IBM mainframes support only OSPF or RIP, so we decided to use VRFs instead.
Here’s what they did:
Read more ...The objective of this blog is to discuss end to end packet (client to server) traversing through a service provider network with special consideration on performance effecting factors.
We will suppose client needs to access any of the service hosted in server connected with CE-2, all the network links and NICs on end system are Ethernet based. Almost all the vendors compute machines (PC/ servers) are generating IP data gram with 1500 bytes size (20 bytes header +1480 data bytes) in normal circumstances.
Fragmentation:- If any of link is unable to handle 1500 size IP data-gram then packet will be fragmented and forwarded to its destination where it will be re-assembled. The fragmentation and re-assembly will introduce overhead and defiantly over all performance will be degraded. In IP header following fields are important to detect fragmentation and to re-assemble the packets.
With below Continue reading
Hey Dockers! We had such a great time attending and speaking at LinuxCon and ContainerCon North America, that we are doing it again next week in Berlin – only bigger and better this time! Make sure to come visit us at booth #D38 and check out the awesome Docker sessions we have lined up:
Solomon Hykes, Docker’s Founder and CTO, will kick off LinuxCon with the first keynote at 9:25. If you aren’t joining us in Berlin, you can live stream his and the other keynotes by registering here.
Tuesday October 4th:
11:15 – 12:05 Docker Captain Adrian Mouat will deliver a comparison of orchestration tools including Docker Swarm, Mesos/Marathon and Kubernetes.
12:15 – 1:05 Patrick Chanezon and David Chung from Docker’s technical team along with Docker Captain and maintainer Phil Estes will demonstrate how to build distributed systems without Docker, using Docker plumbing projects, including RunC, containerd, swarmkit, hyperkit, vpnkit, datakit.
2:30 – 3:20 Docker’s Mike Goelzer will introduce the audience to Docker Services in Getting Started with Docker Services, explain what they are and how to use them to deploy multi-tier applications. Mike will also cover load balancing, service discovery, scaling, security, deployment Continue reading
The last week of September 2016 is over and you know what that means; another Docker news roundup. Highlights include, a new commercial relationship between Docker and Microsoft, general availability of Docker containers on Windows Server 2016, and consolidation of Docker documentation on GitHub! As we begin a new week, let’s recap our five hottest stories:
Weekly #roundup: Top 5 #Docker stories for the Continue reading
IPv6 Transition Mechanisms The only available public IP addresses are IPv6 addresses. But vast majority of the content is still working on IPv4. How IPv6 users can connect to the IPv4 world and How IPv4 users can reach to the IPv6 content ? This is accomplished with the IPv6 transition mechanisms. In this post, I […]
The post IPv6 Transition Mechanisms | Dual-Stack -Tunnelling – Translation appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
Marco Canini from UC Louvain is working on an IXP research project focused on bringing privacy guarantees into Internet routing context. They’re trying to understand the privacy considerations of network operators and have created a short survey to gather the initial data.
Researchers from UC Louvain have been involved in tons of really useful projects including BGP PIC, LFA, MP-TCP, Fibbing, Software-defined IXP and flow-based load balancing, so if you’re connected to an IXP, please take your time and fill in the survey.
Cloudflare has certified with the U.S. Department of Commerce for the new EU-U.S. Privacy Shield framework.
Beginning this summer, the U.S. Department of Commerce began accepting submissions to certify under the EU-U.S. Privacy Shield framework, a new mechanism by which European companies can transfer personal data to their counterparts in the United States. By certifying under Privacy Shield, Cloudflare is taking a strong and pro-active stance towards further protecting the security and privacy of our customers.
Since 1998, following the European Union’s implementation of EU Data Protection Directive 95/46/EC, companies in Europe wishing to transfer the personal data of Europeans overseas have had to ensure that the recipient of such data practices an adequate level of protection when handling this information. Until last October, American companies were able to certify under the U.S.-EU Safe Harbor Accord, which provided a legal means to accept European personal data, in exchange for assurances of privacy commitments and the enactment of specific internal controls.
However, after having been in effect for roughly fifteen years, in October 2015 the European Court of Justice overturned the Safe Harbor and declared that a new mechanism for transatlantic data transfers would need Continue reading