Anypoint Platform - Dedicated Load Balancers presentation that was used for Amsterdam Meetup on 5th of October.
What is a Load Balancer?
Differences between Shared and Dedicated Load Balancers
How to create a Dedicated Load Balancer
Tips and Tricks
We have been talking about Serverless a lot lately and there are a couple of reasons for that. Serverless computing will provide greater scalability, more flexibility, and quicker time to release at reduced cost and this is the reason everybody is after it. Is serverless architecture enough to drive all this we talked about just now? The answer is no, of course. Also, State management has been absolutely challenging in serverless computing but Cloudstate will make it possible for us, wondering how? Keep reading the article until and you will learn it. The Lightbend’s Cloudstate which was released in August last year(2019) has proved to be a game-changer here as it provides stateful serverless computing, Cloudstate brings powerful new distributed and durable state management primitives based on Akka to the Serverless paradigm. Serving of stateful functions powered by Akka Cluster. That was all for the introduction, let’s talk about Cloudstate in detail below.
How Sysbee Manages Infrastructures and Provides Advanced Monitoring by Using ...InfluxData
Discover how Sysbee helps organizations bring DevOps culture to small and medium enterprises. Their team helps their customers by improving stability, security, scalability — by providing cost-effective IT infrastructure. Learn how monitoring everything can improve your processes and simplify debugging!
Sysbee’s introspection on monitoring tools over the years
How TSDB’s, and specifically InfluxDB, fits into improving observability
Their approach to using the TICK Stack to improve the web hosting industry
USENIX LISA15: How TubeMogul Handles over One Trillion HTTP Requests a MonthNicolas Brousse
TubeMogul grew from few servers to over two thousands servers and handling over one trillion http requests a month, processed in less than 50ms each. To keep up with the fast growth, the SRE team had to implement an efficient Continuous Delivery infrastructure that allowed to do over 10,000 puppet deployment and 8,500 application deployment in 2014. In this presentation, we will cover the nuts and bolts of the TubeMogul operations engineering team and how they overcome challenges.
Learn how Decisiv provides secure access to developers and deals with compliance hurdles. Senior Engineer Hunter Madison will talk about how Decisiv needed to quickly solve the pain of scaling the engineering team, migrating to AWS, maintaining ISO 27002 compliance, and a few of his key learnings from his two-year journey using Teleport.
Commit Conf 2018 - Hotelbeds' journey to a microservice cloud-based architectureJordi Puigsegur Figueras
Hotelbeds is one of the leading bedbanks in the world, a global distributor of accommodation based in Palma de Mallorca, with an offering of more than 170.000 hotels and up to 2.500 Million request per day.
In the last two years Hotelbeds Group has undergone a profound technical transformation from an old monolythic on premise architecture to a microservices cloud-native architecture. Nowadays a big chunk of our monolyth has been transformed into java microservices deployed on cloud and we are already processing all our bookings on cloud. We have also moved to the cloud our availability engine, distributed to several locations accross the globe to be closer to the clients and reduce latencies.
This talk is about the path we followed on this fascinating journey, the decisions taken and lessons learned, as well as some insight on our future challenges.
Video available at https://www.youtube.com/watch?v=5H0X65QVF34
* All images used in this presentation are for illustration purposes only. They have been created specifically or obtained from publicly accessible sources. If any image is incorrectly used please contact me and it will be immediately removed and not used in the future.
We have been talking about Serverless a lot lately and there are a couple of reasons for that. Serverless computing will provide greater scalability, more flexibility, and quicker time to release at reduced cost and this is the reason everybody is after it. Is serverless architecture enough to drive all this we talked about just now? The answer is no, of course. Also, State management has been absolutely challenging in serverless computing but Cloudstate will make it possible for us, wondering how? Keep reading the article until and you will learn it. The Lightbend’s Cloudstate which was released in August last year(2019) has proved to be a game-changer here as it provides stateful serverless computing, Cloudstate brings powerful new distributed and durable state management primitives based on Akka to the Serverless paradigm. Serving of stateful functions powered by Akka Cluster. That was all for the introduction, let’s talk about Cloudstate in detail below.
How Sysbee Manages Infrastructures and Provides Advanced Monitoring by Using ...InfluxData
Discover how Sysbee helps organizations bring DevOps culture to small and medium enterprises. Their team helps their customers by improving stability, security, scalability — by providing cost-effective IT infrastructure. Learn how monitoring everything can improve your processes and simplify debugging!
Sysbee’s introspection on monitoring tools over the years
How TSDB’s, and specifically InfluxDB, fits into improving observability
Their approach to using the TICK Stack to improve the web hosting industry
USENIX LISA15: How TubeMogul Handles over One Trillion HTTP Requests a MonthNicolas Brousse
TubeMogul grew from few servers to over two thousands servers and handling over one trillion http requests a month, processed in less than 50ms each. To keep up with the fast growth, the SRE team had to implement an efficient Continuous Delivery infrastructure that allowed to do over 10,000 puppet deployment and 8,500 application deployment in 2014. In this presentation, we will cover the nuts and bolts of the TubeMogul operations engineering team and how they overcome challenges.
Learn how Decisiv provides secure access to developers and deals with compliance hurdles. Senior Engineer Hunter Madison will talk about how Decisiv needed to quickly solve the pain of scaling the engineering team, migrating to AWS, maintaining ISO 27002 compliance, and a few of his key learnings from his two-year journey using Teleport.
Commit Conf 2018 - Hotelbeds' journey to a microservice cloud-based architectureJordi Puigsegur Figueras
Hotelbeds is one of the leading bedbanks in the world, a global distributor of accommodation based in Palma de Mallorca, with an offering of more than 170.000 hotels and up to 2.500 Million request per day.
In the last two years Hotelbeds Group has undergone a profound technical transformation from an old monolythic on premise architecture to a microservices cloud-native architecture. Nowadays a big chunk of our monolyth has been transformed into java microservices deployed on cloud and we are already processing all our bookings on cloud. We have also moved to the cloud our availability engine, distributed to several locations accross the globe to be closer to the clients and reduce latencies.
This talk is about the path we followed on this fascinating journey, the decisions taken and lessons learned, as well as some insight on our future challenges.
Video available at https://www.youtube.com/watch?v=5H0X65QVF34
* All images used in this presentation are for illustration purposes only. They have been created specifically or obtained from publicly accessible sources. If any image is incorrectly used please contact me and it will be immediately removed and not used in the future.
Secure and private collaboration - LinuxDays 2015 Kolab and Univentionhcderaad
Slides from my presentation at LinuxDays in October 2015 in Prague about open source, secure and private collaboration and communication with the Kolab Groupware solution and Univention server.
I've outlined 2 options on how to install and deploy Kolab, either through the Univention App image or on a vanilla server installation. Also I'm taking some time to explain why some considerations about backup strategy and high availability should be made before implementing the software.
How Pulsar Enables Netdata to Offer Unlimited Infrastructure Monitoring for F...StreamNative
The Netdata Agent is free, open source single-node monitoring software. Netdata Cloud is a free, closed source, software-as-a-service that brings together metadata from endpoints running the Netdata Agent, giving a complete view of the health and performance of an infrastructure. All the metrics remain on the Netdata Agent, making Netdata Cloud the focal point of a distributed, infinitely scalable, low cost solution.
The heart of Netdata Cloud is Pulsar. Almost every message coming from and going to the open source agents passes through Pulsar. Pulsar's infinite number of topics has given us the flexibility we needed and in some cases, every single Netdata Agent has its own unique Pulsar topic. A single message from an agent or from a service that processes a front end request can trigger several other Pulsar messages, as we also use Pulsar for communication between microservices (using a CQRS pattern with shared subscriptions for scalability).
The reliable persistence of messages has allowed us to replay old events to rebuild old and build new materialized views and debug specific production issues. It's also what will enable us to implement an event sourcing pattern, for a new set of features we want to introduce shortly.
We have had a few issues with a specific client and our shared subscriptions that we're working on resolving, but overall Pulsar has proven to be one of the most reliable parts of our infrastructure and we decided to proceed with a managed services agreement.
Toronto Virtual Meetup #7 - Anypoint VPC, VPN and DLB ArchitectureAlexandra N. Martinez
Join us for this meetup where Jitendra Bafna (Jacky) will be talking about Anypoint VPC, VPN and DLB Architecture. He will mention the best practices, some use cases, and a live demo!
How Much Can You Connect? | Bhavesh Raheja, Disney + HotstarHostedbyConfluent
How many connects can you run in a single cluster? Disney + Hotstar runs over 10 different connect clusters with over 2000+ connectors. In this talk, we share our experience of running Kafka connect at scale. We will walk through our decisions of using one cluster vs many and how the improvements in the connect ecosystem like incremental rebalancing have allowed us to scale to thousands of connects. We will also discuss challenges with scaling up & down connect workers while keeping the ecosystem stable & present a wishlist of the missing features in this distributed task framework.
How Much Can You Connect? | Bhavesh Raheja, Disney + HotstarHostedbyConfluent
How many connects can you run in a single cluster? Disney + Hotstar runs over 10 different connect clusters with over 2000+ connectors. In this talk, we share our experience of running Kafka connect at scale. We will walk through our decisions of using one cluster vs many and how the improvements in the connect ecosystem like incremental rebalancing have allowed us to scale to thousands of connects. We will also discuss challenges with scaling up & down connect workers while keeping the ecosystem stable & present a wishlist of the missing features in this distributed task framework.
Locking down your Kubernetes cluster with LinkerdBuoyant
In this hands-on workshop, we cover the basics of locking down in-cluster network traffic using the new traffic policies introduced in Linkerd 2.11. Using Linkerd’s ability to authorize traffic based on workload identity, we cover a variety of practical use cases, including restricting access to a critical service, preventing traffic across namespaces, and locking down traffic while still allowing metrics scrapes, health checks, and other meta-traffic.
RTBkit Meetup - Developer Spotlight, Behind the Scenes of RTBkit and Intro to...Datacratic
Join us for a Virtual RTBkit Meetup to kick off 2015 with knowledge, best practices and tips from the RTBkit developer community.
Agenda:
- RTBkit Developer Speaker Spotlight with Nicolas Emiliani - RTB Technical Lead, Motrixi
- RTBkit Behind the Scenes Update
- Intro to the RTBkit Stack
- Open Q&A
Join us for this virtual meetup from the comfort of your home or office. Virtual seats are limited so register early to claim your spot.
Urs Hoelzle
Vice President
Google
Summary
● Google operates two large backbone networks
○ Internet-facing backbone (user traffic)
○ Datacenter backbone (internal traffic)
● Managing large backbones is hard
● OpenFlow has helped us improve backbone performance and reduce backbone complexity and cost
● I'll tell you how
ONS2015: http://bit.ly/ons2015sd
ONS Inspire! Webinars: http://bit.ly/oiw-sd
Watch the talk (video) on ONS Content Archives: http://bit.ly/ons-archives-sd
Running Dataproc At Scale in production - Searce Talk at GDG DelhiSearce Inc
From the collective experience of helping multiple customers run hundreds of dataproc clusters in production, scale them, troubleshoot issues, our engineers Manan and Rohit talk about running Dataproc At Scale in Production.
DORS/CLUC How to setup Kolab and Seafile as your personal secure data bankhcderaad
Hosting your own servers for groupware and filestorage can be very compelling because of a number of reasons.
But doing it right can be quite a tedious job. This workshop, which was given at the DORS/CLUC conference in Zagreb will guide you through installing the Kolab groupware solution and integrate the Seafile filesyncing application with it, creating your own personal data bank!
HAProxy is often used to route ingress traffic, but we use it the other way around. We use it for egress. Our applications talk to the outside world through HAProxy. We get a lot of benefits from this unique approach: throttling, guaranteed response times, unified monitoring, and path rewriting. I will highlight how we use HAProxy at Inuits and how we achieve observability via Prometheus and Grafana.
Laskar: High-Velocity GraphQL & Lambda-based Software Development ModelGarindra Prahandono
Sale Stock Engineering, represented by Garindra Prahandono, presents "High-Velocity GraphQL & Lambda-based Software Development Model" in BandungJS event on May 14th, 2018.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Secure and private collaboration - LinuxDays 2015 Kolab and Univentionhcderaad
Slides from my presentation at LinuxDays in October 2015 in Prague about open source, secure and private collaboration and communication with the Kolab Groupware solution and Univention server.
I've outlined 2 options on how to install and deploy Kolab, either through the Univention App image or on a vanilla server installation. Also I'm taking some time to explain why some considerations about backup strategy and high availability should be made before implementing the software.
How Pulsar Enables Netdata to Offer Unlimited Infrastructure Monitoring for F...StreamNative
The Netdata Agent is free, open source single-node monitoring software. Netdata Cloud is a free, closed source, software-as-a-service that brings together metadata from endpoints running the Netdata Agent, giving a complete view of the health and performance of an infrastructure. All the metrics remain on the Netdata Agent, making Netdata Cloud the focal point of a distributed, infinitely scalable, low cost solution.
The heart of Netdata Cloud is Pulsar. Almost every message coming from and going to the open source agents passes through Pulsar. Pulsar's infinite number of topics has given us the flexibility we needed and in some cases, every single Netdata Agent has its own unique Pulsar topic. A single message from an agent or from a service that processes a front end request can trigger several other Pulsar messages, as we also use Pulsar for communication between microservices (using a CQRS pattern with shared subscriptions for scalability).
The reliable persistence of messages has allowed us to replay old events to rebuild old and build new materialized views and debug specific production issues. It's also what will enable us to implement an event sourcing pattern, for a new set of features we want to introduce shortly.
We have had a few issues with a specific client and our shared subscriptions that we're working on resolving, but overall Pulsar has proven to be one of the most reliable parts of our infrastructure and we decided to proceed with a managed services agreement.
Toronto Virtual Meetup #7 - Anypoint VPC, VPN and DLB ArchitectureAlexandra N. Martinez
Join us for this meetup where Jitendra Bafna (Jacky) will be talking about Anypoint VPC, VPN and DLB Architecture. He will mention the best practices, some use cases, and a live demo!
How Much Can You Connect? | Bhavesh Raheja, Disney + HotstarHostedbyConfluent
How many connects can you run in a single cluster? Disney + Hotstar runs over 10 different connect clusters with over 2000+ connectors. In this talk, we share our experience of running Kafka connect at scale. We will walk through our decisions of using one cluster vs many and how the improvements in the connect ecosystem like incremental rebalancing have allowed us to scale to thousands of connects. We will also discuss challenges with scaling up & down connect workers while keeping the ecosystem stable & present a wishlist of the missing features in this distributed task framework.
How Much Can You Connect? | Bhavesh Raheja, Disney + HotstarHostedbyConfluent
How many connects can you run in a single cluster? Disney + Hotstar runs over 10 different connect clusters with over 2000+ connectors. In this talk, we share our experience of running Kafka connect at scale. We will walk through our decisions of using one cluster vs many and how the improvements in the connect ecosystem like incremental rebalancing have allowed us to scale to thousands of connects. We will also discuss challenges with scaling up & down connect workers while keeping the ecosystem stable & present a wishlist of the missing features in this distributed task framework.
Locking down your Kubernetes cluster with LinkerdBuoyant
In this hands-on workshop, we cover the basics of locking down in-cluster network traffic using the new traffic policies introduced in Linkerd 2.11. Using Linkerd’s ability to authorize traffic based on workload identity, we cover a variety of practical use cases, including restricting access to a critical service, preventing traffic across namespaces, and locking down traffic while still allowing metrics scrapes, health checks, and other meta-traffic.
RTBkit Meetup - Developer Spotlight, Behind the Scenes of RTBkit and Intro to...Datacratic
Join us for a Virtual RTBkit Meetup to kick off 2015 with knowledge, best practices and tips from the RTBkit developer community.
Agenda:
- RTBkit Developer Speaker Spotlight with Nicolas Emiliani - RTB Technical Lead, Motrixi
- RTBkit Behind the Scenes Update
- Intro to the RTBkit Stack
- Open Q&A
Join us for this virtual meetup from the comfort of your home or office. Virtual seats are limited so register early to claim your spot.
Urs Hoelzle
Vice President
Google
Summary
● Google operates two large backbone networks
○ Internet-facing backbone (user traffic)
○ Datacenter backbone (internal traffic)
● Managing large backbones is hard
● OpenFlow has helped us improve backbone performance and reduce backbone complexity and cost
● I'll tell you how
ONS2015: http://bit.ly/ons2015sd
ONS Inspire! Webinars: http://bit.ly/oiw-sd
Watch the talk (video) on ONS Content Archives: http://bit.ly/ons-archives-sd
Running Dataproc At Scale in production - Searce Talk at GDG DelhiSearce Inc
From the collective experience of helping multiple customers run hundreds of dataproc clusters in production, scale them, troubleshoot issues, our engineers Manan and Rohit talk about running Dataproc At Scale in Production.
DORS/CLUC How to setup Kolab and Seafile as your personal secure data bankhcderaad
Hosting your own servers for groupware and filestorage can be very compelling because of a number of reasons.
But doing it right can be quite a tedious job. This workshop, which was given at the DORS/CLUC conference in Zagreb will guide you through installing the Kolab groupware solution and integrate the Seafile filesyncing application with it, creating your own personal data bank!
HAProxy is often used to route ingress traffic, but we use it the other way around. We use it for egress. Our applications talk to the outside world through HAProxy. We get a lot of benefits from this unique approach: throttling, guaranteed response times, unified monitoring, and path rewriting. I will highlight how we use HAProxy at Inuits and how we achieve observability via Prometheus and Grafana.
Laskar: High-Velocity GraphQL & Lambda-based Software Development ModelGarindra Prahandono
Sale Stock Engineering, represented by Garindra Prahandono, presents "High-Velocity GraphQL & Lambda-based Software Development Model" in BandungJS event on May 14th, 2018.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
KuberTENes Birthday Bash Guadalajara - K8sGPT first impressionsVictor Morales
K8sGPT is a tool that analyzes and diagnoses Kubernetes clusters. This presentation was used to share the requirements and dependencies to deploy K8sGPT in a local environment.
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Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Understanding Inductive Bias in Machine LearningSUTEJAS
This presentation explores the concept of inductive bias in machine learning. It explains how algorithms come with built-in assumptions and preferences that guide the learning process. You'll learn about the different types of inductive bias and how they can impact the performance and generalizability of machine learning models.
The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
By understanding inductive bias, you can gain valuable insights into how machine learning models work and make informed decisions when building and deploying them.
Online aptitude test management system project report.pdfKamal Acharya
The purpose of on-line aptitude test system is to take online test in an efficient manner and no time wasting for checking the paper. The main objective of on-line aptitude test system is to efficiently evaluate the candidate thoroughly through a fully automated system that not only saves lot of time but also gives fast results. For students they give papers according to their convenience and time and there is no need of using extra thing like paper, pen etc. This can be used in educational institutions as well as in corporate world. Can be used anywhere any time as it is a web based application (user Location doesn’t matter). No restriction that examiner has to be present when the candidate takes the test.
Every time when lecturers/professors need to conduct examinations they have to sit down think about the questions and then create a whole new set of questions for each and every exam. In some cases the professor may want to give an open book online exam that is the student can take the exam any time anywhere, but the student might have to answer the questions in a limited time period. The professor may want to change the sequence of questions for every student. The problem that a student has is whenever a date for the exam is declared the student has to take it and there is no way he can take it at some other time. This project will create an interface for the examiner to create and store questions in a repository. It will also create an interface for the student to take examinations at his convenience and the questions and/or exams may be timed. Thereby creating an application which can be used by examiners and examinee’s simultaneously.
Examination System is very useful for Teachers/Professors. As in the teaching profession, you are responsible for writing question papers. In the conventional method, you write the question paper on paper, keep question papers separate from answers and all this information you have to keep in a locker to avoid unauthorized access. Using the Examination System you can create a question paper and everything will be written to a single exam file in encrypted format. You can set the General and Administrator password to avoid unauthorized access to your question paper. Every time you start the examination, the program shuffles all the questions and selects them randomly from the database, which reduces the chances of memorizing the questions.
NUMERICAL SIMULATIONS OF HEAT AND MASS TRANSFER IN CONDENSING HEAT EXCHANGERS...ssuser7dcef0
Power plants release a large amount of water vapor into the
atmosphere through the stack. The flue gas can be a potential
source for obtaining much needed cooling water for a power
plant. If a power plant could recover and reuse a portion of this
moisture, it could reduce its total cooling water intake
requirement. One of the most practical way to recover water
from flue gas is to use a condensing heat exchanger. The power
plant could also recover latent heat due to condensation as well
as sensible heat due to lowering the flue gas exit temperature.
Additionally, harmful acids released from the stack can be
reduced in a condensing heat exchanger by acid condensation. reduced in a condensing heat exchanger by acid condensation.
Condensation of vapors in flue gas is a complicated
phenomenon since heat and mass transfer of water vapor and
various acids simultaneously occur in the presence of noncondensable
gases such as nitrogen and oxygen. Design of a
condenser depends on the knowledge and understanding of the
heat and mass transfer processes. A computer program for
numerical simulations of water (H2O) and sulfuric acid (H2SO4)
condensation in a flue gas condensing heat exchanger was
developed using MATLAB. Governing equations based on
mass and energy balances for the system were derived to
predict variables such as flue gas exit temperature, cooling
water outlet temperature, mole fraction and condensation rates
of water and sulfuric acid vapors. The equations were solved
using an iterative solution technique with calculations of heat
and mass transfer coefficients and physical properties.
3. Introductions
●About the organizer: Fatih Turgut
○ Moved to the Netherlands 2 years ago, Living in Amsterdam, married, 1 daughter.
○ 10+ Years in IT, last 6 years with Mulesoft. MCIA, MCPA.
○ Sr. Consultant at Devoteam for the last 2 years. Recent assignments; Intergamma, RTL,
Sodexo, Accell IT
●About the sponsor: Devoteam
○ Devoteam is a leading consulting firm focused on digital strategy, tech platforms, data and
cybersecurity.
○ With 25 years’ experience and more than 10,000 employees across Europe, the Middle East
and Africa, Devoteam promotes responsible tech for people and works to create better change.
4. Cloudhub Dedicated Load Balancers
What is a Load Balancer?
● Efficiently distributing incoming network traffic across a group of servers or applications.
○ Maximizes speed and capacity utilization and ensures that no server is overworked or
overwhelmed.
5. Mulesoft Cloudhub
● CloudHub is a cloud-based integration platform as a service (iPaaS) that enables developers to
integrate and orchestrate applications and services. These applications and services are run on
one or more instances of MuleSoft which is known as Workers. CloudHub provides a load
balancing service for all integrations. We can use the default load balancing service (SLB) or
obtain a dedicated load balancer.
6. Shared Load Balancer
● As the name suggests, a ‘Shared’ Load Balancer is shared between all the CloudHub
customers and it sits outside of the Client’s VPC.
● There is one SLB clustered instance in each CloudHub region that serves all the CloudHub
customers in that AWS region.Therefore, SLB can only be used to balance the calls for the
external-facing APIs, it can’t be used for balancing the load between your internal workers.
7. Dedicated Load Balancer
● Dedicated Load Balancer (DLB) is an
optional component of the Anypoint
Platform that enables you to route
external and internal HTTP and HTTPS
traffic to multiple Mule applications
deployed in your VPC.
● DLB sits inside of your VPC and while
routing incoming traffic, it will route to
8091 and 8092 ports.
● You will have more control over it, like
scalability, vanity domain, your very own
SSL certificates, and two-way TLS
configuration.
8. Technical Aspects of DLB
● Every DLB can be associated with only one VPC.
● Each DLB by default runs in a highly available configuration with 2 workers.
● Each worker size is configured as 2 vCores + 3.5 GB Memory. This won't consume the vCores
from CloudHub vCore subscription.
● Scalable horizontally but not vertically.
● Every entitlement includes 2 workers. So for every 2 workers you need 1 DLB licence.
● 1 DLB can be configured with max 8 workers.
● Connect timeout is 4 seconds per worker (4 times it tries for a TCP handshake and waits for 1
second per try). If the attempt fails for one worker, it gets another IP from the internal DNS for
subsequent workers. When there are no more workers left, it responds with a Connect Timeout.
10. Public and Private Exposure
● Default 2 workers, so 2 Public and 2 Private IPs are assigned.
● Public IP addresses can be set as static
● Private IP addresses can not be assigned static IPs. It randomly gets assigned to two of the
CIDR range of the VPC.
● Private IP addresses naturally can be called only from your internal network. That means only by
the Mule applications that runs on the same VPC or over the VPN tunnel if exists.
● You can limit the IPs that can access to the DLB with Allowlist. Its default is 0.0.0.0/0 , basically
anywhere.
11. DNS Structure and Mappings
● 2 DNS is associated with your DLB regardless of worker counts. 1 DNS is for public facing and
resolves to your public IPs of DLB, and the other one is for internal facing and resolves to your
internal IPs of DLB.
● Public DNS naming convention is: <lb-name>.<sub-domain-for-anypointdns>.anypointdns.net
● Private DNS naming convention is: internal-<lb-name>.<sub-domain-for-
anypointdns>.anypointdns.net
● We can mask the default DNS of Anypoint Platform with a SSL Certificate and DNS CNAME
Record. DNS A record is not advised even though you use static IPs.
12. DLB Properties and Options
● Allowlisted CIDRs - Default 0.0.0.0/0
● Timeout in Seconds - Response Timeout Default 300 Seconds
● Connect Timeout - 4 seconds (4 times it tries for a TCP handshake and waits for 1 second per try
per worker)
● Inbound HTTP Mode:
○ Mode Off
○ Mode On
○ Mode Redirect
● Static IP
● Keep URL Encoding - Non-ASCII chars to ASCII; %20 (space) and %23 (#)
● Support TLS 1.0 - Not advised. Last resort.
● Upstream TLS 1.2 - Force the TLS 1.2 from DLB to Mule worker
● Forward Client Certificate*
13. SSL Certificates
A dedicated load balancer must have at least one certificate associated with it in order to create it.
● Certificates must be pem-encoded.
● The private Key has to be unencrypted.
● All the key attributes and bag attributes must be removed.
● Files must contain the entire certificate chain and that chain has to be ordered sequentially.
If those are sent to you separately you can simply append them to a text editor. The order of
the certificates in the file must be:
○ Certificate for the DLB
○ Certificates for intermediate CAs
○ Certificate for the root CA
14. Creating the SSL Certificate
● We are going to use OpenSSL
● If you already have Git for Windows, you may simply go to the Git installation directory, find
usrbinopenssl.exe and run it or run the Git Bash and use the “OpenSSL” command.
● A third option would be to add the git OpenSSL path to the environment variables so you
can access OpenSSL from cmd and anywhere.
Create cert&key: openssl req -x509 -newkey rsa:2048 -keyout dlbk.pem -out dlbcert.pem -days 365
Decrypt key: openssl rsa -in dlbk.pem -out undlbk.pem
A Record is not suggested because if the DLB is upscaled or downscaled we need to update the A record again.
We will go into the details of creating a certificate