Updated: Path MTU Discovery
After describing MTU basics and drawbacks of IP fragmentation, it’s time for more details: Path MTU Discovery (PMTUD) and network implications of using ICMP for PMTUD.
Interested in similar topics? Check out How Networks Really Work webinar.
SLOG: serializable, low-latency, geo-replicated transactions
SLOG: serializable, low-latency, geo-replicated transactions Ren et al., VLDB’19
SLOG is another research system motivated by the needs of the application developer (aka, user!). Building correct applications is much easier when the system provides strict serializability guarantees.
Strict serializability reduces application code complexity and bugs, since it behaves like a system that is running on a single machine processing transactions sequentially.
The challenge with strict serializability (or even just serializability on a regular DBMS) is that it requires coordination, and as we know, coordination kills performance. Weaker consistency models can give better performance yet “expose applications to potential race condition bugs, and typically require skilled application programmers.” But developers are the kingmakers (I think it’s been enough time now that we can drop the ‘new’ in that phrase?? ;) ), and thus:
… the demand for systems that support strict serializability has only increased.
So starting with strict serializability as a given, how do we claw back some of that performance? That’s where SLOG (Serializable LOw-latency, Geo-replicated transactions) comes in.
SLOG achieves high throughput, strictly serializable ACID transactions at geo-replicated scale for all transactions submitted across the world, all the while achieving low latency for transactions Continue reading
Nvidia Shows Off Tech Chops With RC18 Inference Chip
It would be convenient for everyone – chip makers and those who are running machine learning workloads – if training and inference could be done on the same device. …
Nvidia Shows Off Tech Chops With RC18 Inference Chip was written by Timothy Prickett Morgan at The Next Platform.
Operators Dish on 5G Strategies for Enterprise
5G heralds a new framework for mobile connectivity and has enterprises poised to gain entirely new...
Will CCDE Practical Exam (Lab) Change in 2020?
Will CCDE Exam (Lab) change in 2020. I have been receiving this question again and again after Cisco’s announcement on Cisco certification exam changes. Short answer is NO. Little bit long answer is, it will not change in February 2020 and in fact it has been the only design certification since many years. (Cisco I …
Continue reading "Will CCDE Practical Exam (Lab) Change in 2020?"
The post Will CCDE Practical Exam (Lab) Change in 2020? appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
Technologies and the protocols may not be used for what they were intended
I was reading a book today , called Deploying QoS for Cisco IP and NGN networks, which I can recommend you for history and future for QoS in networking industry, there was couple paragraph in the book, which lead me to share my thoughts about the protocols/technologies and their usage. In the book, as …
Continue reading "Technologies and the protocols may not be used for what they were intended"
The post Technologies and the protocols may not be used for what they were intended appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
New White Paper From IDC: How Network Disaggregation Facilitates Datacenter and IT Modernization
In this new white paper, sponsored by Dell EMC and Pluribus Networks, IDC analyst Brad Casemore examines the disaggregation of...AnsibleFest Atlanta – Infrastructure Automation
AnsibleFest is only a few short weeks away and we are excited to share with you all the great content and sessions we have lined up! On the Ansible blog, we have been taking a closer look at each of the breakout session tracks so that attendees can better personalize their AnsibleFest experience. We sat down with Track Lead Dylan Silva to find out more about the Infrastructure Automation Track and sessions within the track.
Who is this track best for?
This track is best for sysadmins that are looking for information related to general infrastructure automation with Ansible.
What topics will this track cover?
Sessions in this track will cover bare-metal, server administration, and inventory management, among other related topics. There will be a session covering the automation of VMware infrastructure using REST APIs, how to use Ansible against your vSphere environment, how to use Ansible to pull approved firewall change requests from our change management system, and much more.
What should attendees expect to learn from this track?
Attendees should expect to learn best practices related to infrastructure management. This includes scaling Ansible for loT deployments, taking a closer Continue reading
Accelerating AI With GPU Virtualization In The Cloud
In July, VMware acquired Bitfusion, a company whose technology virtualizes compute accelerators with the goal of enabling modern workloads like artificial intelligence and data analytics to take full advantage of systems with GPUs or with FPGAs. …
Accelerating AI With GPU Virtualization In The Cloud was written by Jeffrey Burt at The Next Platform.
SDxCentral’s Top 10 Articles — August 2019
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Lanner Joins Forces With Hot OCP Ecosystem
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Huawei Accuses US of Cyberattacks, ‘Menacing’ Its Employees
Huawei accused the U.S. government of using cyberattacks and “every tool at its disposal” to...
AT&T Asks to Play With Its mmWave 5G Spectrum
The carrier has asked the FCC for early access to the 24 GHz spectrum it won during a recent...
Top Redis Use Cases by Core Data Structure Types
Redis, short for Remote Dictionary Server, is a BSD-licensed, open-source in-memory key-value data structure store written in C language by Salvatore Sanfillipo and was first released on May 10, 2009. Depending on how it is configured, Redis can act like a database, a cache or a message broker. It’s important to note that Redis is a NoSQL database system. This implies that unlike SQL (Structured Query Language) driven database systems like MySQL, PostgreSQL, and Oracle, Redis does not store data in well-defined database schemas which constitute tables, rows, and columns. Instead, Redis stores data in data structures which makes it very flexible to use. In this blog, we outline the top Redis use cases by the different core data structure types.
Data Structures in Redis
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2019 Chapterthon – Our Chapters, Connecting the World One Community at a Time
Each year, the Chapterthon project competition brings enthusiasm and excitement among our global community. We look forward to this time of year, when our communities mobilize and work alongside each other to achieve a common goal for the development of the Internet.
For the 2019 Chapterthon, we are delighted to announce that 34 Chapters and Special Interest Groups (SIGs) from across the globe have started implementing their work on local solutions that will bring some of the hardest-to-reach places and community segments online—connecting the unconnected.
Over the next two months, these 34 projects will:
- connect underprivileged and rural areas in Armenia, Bangladesh, Benin, Mali, and South Africa;
- build a community network in Kenya;
- establish online databases for rural farmers in Burkina Faso and Saint Vincent and the Grenadines;
- create an online audio library for people living with disabilities in northern rural Argentina;
- revolutionize a mobile network unit in Madagascar for use in the event of a natural disaster;
- educate and empower over fifty rural women on how to use the Internet during a friendly game of “Tag”;
- build an FM broadcast system in rural Ghana; preserve Indigenous culture in rural Brazil;
- sweat it out at a bootcamp in Continue reading