A talk on how to think about choosing a distributed messaging technology, and some notes on how to avoid locking yourself into a single choice, keeping your platform able to grow as needs change.
A talk on how to think about choosing a distributed messaging technology, and some notes on how to avoid locking yourself into a single choice, keeping your platform able to grow as needs change.
Brainstorming session for agents support in Nova code. Current state of agents, its support in Nova. New architecture of agents-Nova communication, agnostic to hypervisor, is suggested.
This is session is on WebAssembly with Rust. In which first we will discuss web assembly in detail then we will discuss how the WebAssembly will change the dimension of web development followed with the Demo and see some Live applications working on WebAssembly.
In this session, I will discuss the use of puppeteer for implementing a simple feature of export to pdf. We will also discuss some of the problems that one can face, and how they can be resolved.
Kernel Recipes 2014 - Performance Does MatterAnne Nicolas
Deploying clouds is in everybody’s mind but how to make an efficient deployment ?
After setting up the hardware, it’s mandatory to make a deep inspection of server’s performance.
In a farm of supposed identical servers, many miss-{installation|configuration} could seriously degrade performance. If you want to discovery such counter-performance before users complains of their VMs, you have to be detect them before installing any software. Another performance metric to know is “how many VMs could I load on top of my servers ?”. By using the same methodology it is possible the compare how a set of VMs performs regarding the bare metal capabilities.
The challenge is here: How do detect automatically servers that under perform ? How to insure that a new server entering a farm will not degrade it ? How to measure the overhead of all the virtualization layers from the VM point of view ?
Erwan Velu – Performance Engineer @eNovance
Through Meteor to the stars - Developing full-stack SPA's with meteor.jsWekoslav Stefanovski
You've successfully learned all the ins and outs of Javascript, and can code up a website's front-end in minutes. Great. But, you always had to rely on some pesky back-end developers, with their weird way of speaking, using their weird server languages...
Well, not any more - With meteor.js, you can create, build and deploy a completely complete website using only Javascript - and all from your favorite editor. Come and see the magic!
A talk given at the Infrastructure Coders Meetup in Canberra May 2018.
This presentation gives an overview of the Hyperledger projects in general and some closer look at Hyperledger Fabric and how to deploy it to AWS.
Two deployment options are explored: AWS Blockchain Template and Hyperledger Cello Ansible Agent.
Talk given at the PHP user group Frankfurt regarding asynchronous events in Symfony 2 and the RabbitMQ library. We demonstrate some ups and downs as well as best practices and lessons learned.
Consistency Models in New Generation Databasesiammutex
Roger Bodamer talks about consistency models in NoSQL databases and how they compare to traditional RDBMS solutions, showing how different products deal with replication, multiple copies of information, consistency, failover, high availability.
Brainstorming session for agents support in Nova code. Current state of agents, its support in Nova. New architecture of agents-Nova communication, agnostic to hypervisor, is suggested.
This is session is on WebAssembly with Rust. In which first we will discuss web assembly in detail then we will discuss how the WebAssembly will change the dimension of web development followed with the Demo and see some Live applications working on WebAssembly.
In this session, I will discuss the use of puppeteer for implementing a simple feature of export to pdf. We will also discuss some of the problems that one can face, and how they can be resolved.
Kernel Recipes 2014 - Performance Does MatterAnne Nicolas
Deploying clouds is in everybody’s mind but how to make an efficient deployment ?
After setting up the hardware, it’s mandatory to make a deep inspection of server’s performance.
In a farm of supposed identical servers, many miss-{installation|configuration} could seriously degrade performance. If you want to discovery such counter-performance before users complains of their VMs, you have to be detect them before installing any software. Another performance metric to know is “how many VMs could I load on top of my servers ?”. By using the same methodology it is possible the compare how a set of VMs performs regarding the bare metal capabilities.
The challenge is here: How do detect automatically servers that under perform ? How to insure that a new server entering a farm will not degrade it ? How to measure the overhead of all the virtualization layers from the VM point of view ?
Erwan Velu – Performance Engineer @eNovance
Through Meteor to the stars - Developing full-stack SPA's with meteor.jsWekoslav Stefanovski
You've successfully learned all the ins and outs of Javascript, and can code up a website's front-end in minutes. Great. But, you always had to rely on some pesky back-end developers, with their weird way of speaking, using their weird server languages...
Well, not any more - With meteor.js, you can create, build and deploy a completely complete website using only Javascript - and all from your favorite editor. Come and see the magic!
A talk given at the Infrastructure Coders Meetup in Canberra May 2018.
This presentation gives an overview of the Hyperledger projects in general and some closer look at Hyperledger Fabric and how to deploy it to AWS.
Two deployment options are explored: AWS Blockchain Template and Hyperledger Cello Ansible Agent.
Talk given at the PHP user group Frankfurt regarding asynchronous events in Symfony 2 and the RabbitMQ library. We demonstrate some ups and downs as well as best practices and lessons learned.
Consistency Models in New Generation Databasesiammutex
Roger Bodamer talks about consistency models in NoSQL databases and how they compare to traditional RDBMS solutions, showing how different products deal with replication, multiple copies of information, consistency, failover, high availability.
Choosing the right parallel compute architecture corehard_by
Multi-core architecture is the present and future way in which the market is addressing Moore’s law limitations. Multi-core workstations, high performance computers, GPUs and the focus on hybrid/ public cloud technologies for offloading and scaling applications is the direction development is heading. Leveraging multiple cores in order to increase application performance and responsiveness is expected especially from classic high-throughput executions such as rendering, simulations, and heavy calculations. Choosing the correct multi-core strategy for your software requirements is essential, making the wrong decision can have serious implications on software performance, scalability, memory usage and other factors. In this overview, we will inspect various considerations for choosing the correct multi-core strategy for your application’s requirement and investigate the pros and cons of multi-threaded development vs multi-process development. For example, Boost’s GIL (Generic Image Library) provides you with the ability to efficiently code image processing algorithms. However, deciding whether your algorithms should be executed as multi-threaded or multi-process has a high impact on your design, coding, future maintenance, scalability, performance, and other factors.
A partial list of considerations to take into account before taking this architectural decision includes:
- How big are the images I need to process
- What risks can I have in terms of race-conditions, timing issues, sharing violations – does it justify multi-threading programming?
- Do I have any special communication and synchronization requirements?
- How much time would it take my customers to execute a large scenario?
- Would I like to scale processing performance by using the cloud or cluster?
We will then examine these issues in real-world environments. In order to learn how this issue is being addressed in a real-world scenario, we will examine common development and testing environments we are using in our daily work and compare the multi-core strategies they have implemented in order to promote higher development productivity.
ER(Entity Relationship) Diagram for online shopping - TAEHimani415946
https://bit.ly/3KACoyV
The ER diagram for the project is the foundation for the building of the database of the project. The properties, datatypes, and attributes are defined by the ER diagram.
This 7-second Brain Wave Ritual Attracts Money To You.!nirahealhty
Discover the power of a simple 7-second brain wave ritual that can attract wealth and abundance into your life. By tapping into specific brain frequencies, this technique helps you manifest financial success effortlessly. Ready to transform your financial future? Try this powerful ritual and start attracting money today!
Multi-cluster Kubernetes Networking- Patterns, Projects and GuidelinesSanjeev Rampal
Talk presented at Kubernetes Community Day, New York, May 2024.
Technical summary of Multi-Cluster Kubernetes Networking architectures with focus on 4 key topics.
1) Key patterns for Multi-cluster architectures
2) Architectural comparison of several OSS/ CNCF projects to address these patterns
3) Evolution trends for the APIs of these projects
4) Some design recommendations & guidelines for adopting/ deploying these solutions.
1.Wireless Communication System_Wireless communication is a broad term that i...JeyaPerumal1
Wireless communication involves the transmission of information over a distance without the help of wires, cables or any other forms of electrical conductors.
Wireless communication is a broad term that incorporates all procedures and forms of connecting and communicating between two or more devices using a wireless signal through wireless communication technologies and devices.
Features of Wireless Communication
The evolution of wireless technology has brought many advancements with its effective features.
The transmitted distance can be anywhere between a few meters (for example, a television's remote control) and thousands of kilometers (for example, radio communication).
Wireless communication can be used for cellular telephony, wireless access to the internet, wireless home networking, and so on.
2. Not all web
servers are
made equal
There are different types of
architecture resulting in difference
in performances and resource
usage.
But first a little bit of definitions.
3. Do you know the difference between a program and
a process ?
● A program is a bunch of code
understandable by a computer that is
located on a storage device.
● A process is a copy of a program in the
RAM of a computer that is currently
runned by that computer.
● It’s completely possible that the same
program is runned multiple times, thus
resulting in multiple concurrent
processes. It’s even a common practice.
SSD
program1
RAM
program1_1
program1_2
program1_3
4. A few facts about
processes
● They all have their own RAM allocated by
the operating system.
● They can communicate with each other
with means similar to network
connections.
5. I also heard about a thing called “Threads” ?
● They are a feature of all modern
operating systems.
● Threads allow to have multiple
threads of execution within a
single process.
● They share the same memory.
● Due to the risk of inconsistency
with sharing that same memory
they have to rely on locks.
RAM
process1
thread1 thread2 thread3
7. One process, one thread
● Can handle only one request at
a time.
● Is very simple to implement.
● Examples: PHP dev server, a
lot of other dev servers…
● No one really uses this in
production, the inability to
handle concurrent requests
makes this model only suitable
for quick tests.
Client
Process
8. Multiple processes, one thread per process
● Each process handles one
request max at any given time.
● Number of concurrent requests
is limited by the amount of
processes.
● Relatively high usage of RAM
per max number of concurrent
requests.
● Technologies using it: PHP
Client
Process Process Process
9. Multiple threads
● The process dispatches requests
to a pool of thread.
● Number of concurrent requests
only limited by the size of the
thread pool. Each thread usually
uses less RAM than a process.
● Can be combined with multiple
processes for best of both
worlds.
● Technologies using it: Python,
Ruby, Java, .NET,...
Client
Thread Thread Thread
Process
10. Models using alternatives to
threads
Multi-threads applications are nice, but some people still
complain about their performances and limitations. That’s
why multiple technologies (Go, Erlang, Haskell, Node.js,...)
offer alternatives. Here we will focus on one specific model...
11. Event-based web servers
● An alternative to threads where the
program manually handles context
switches using an event queue.
● Generally allows more parallelism
than multiple threads and is
considered as a more efficient
alternative for a lot of applications.
(Not all.)
● Can still be combined with multi
processed or multithreaded
architectures.
● Technologies using it: Nginx, Node.js,
Python
Client
Process
Thread
Event Event Event
12. A word about WebSockets
● They are a new specification implemented on all modern browsers.
● Instead of working on a “per request” basis, they allow persistent bi-
directional connexions between a browser and a web server.
● They are immensely useful for a lot of applications (instant messaging,
collaborative applications, notifications, video games,...)
● Multi-processes architectures are almost unable to use them as each
connexion monopolize a full process persistently.
● Multi-threads architectures are not very efficient either because there is still a
limit to the number of threads on a Linux server.
● Event-based architectures are usually considered very effective to use
WebSockets.