Basically everything you need to get started on your Zookeeper training, and setup apache Hadoop high availability with QJM setup with automatic failover.
Slides for presentation on ZooKeeper I gave at Near Infinity (www.nearinfinity.com) 2012 spring conference.
The associated sample code is on GitHub at https://github.com/sleberknight/zookeeper-samples
PostgreSQL High-Availability and Geographic Locality using consulSean Chittenden
Virtual IPs or floating IPs have long been the workhorse mechanism for providing high-availability for database systems, however floating IP addresses have several limitations that make it problematic in modern data centers and cloud environments, notably that it requires all members be in the same Layer-2 domain. consul is a strongly consistent way of providing high-availability services in Layer-3 environments and provides fail-over across different geographic regions. In this talk we will discuss the benefits, setup, and use of consul for fail-over of PostgreSQL, both in a local data center scenario and a geographic redundancy scenario where databases are split across multiple data centers.
Basically everything you need to get started on your Zookeeper training, and setup apache Hadoop high availability with QJM setup with automatic failover.
Slides for presentation on ZooKeeper I gave at Near Infinity (www.nearinfinity.com) 2012 spring conference.
The associated sample code is on GitHub at https://github.com/sleberknight/zookeeper-samples
PostgreSQL High-Availability and Geographic Locality using consulSean Chittenden
Virtual IPs or floating IPs have long been the workhorse mechanism for providing high-availability for database systems, however floating IP addresses have several limitations that make it problematic in modern data centers and cloud environments, notably that it requires all members be in the same Layer-2 domain. consul is a strongly consistent way of providing high-availability services in Layer-3 environments and provides fail-over across different geographic regions. In this talk we will discuss the benefits, setup, and use of consul for fail-over of PostgreSQL, both in a local data center scenario and a geographic redundancy scenario where databases are split across multiple data centers.
How and Why Prometheus' New Storage Engine Pushes the Limits of Time Series D...Docker, Inc.
The Prometheus monitoring system collects and stores time series data to give valuable insights over hosts, containers, and applications. Its storage engine was designed to be multiple orders of magnitude faster and more space efficient than, say, RRD or SQL storage. However, with the rise of orchestration systems such as Docker Swarm and Kubernetes, and their extensive use of techniques like rolling updates and auto-scaling, environments are becoming increasingly dynamic. This increases the strain on metrics collection systems. To deal with the challenges, a new storage engine has been developed from scratch, bringing a sharp increase in performance and enabling new features.
This talk will describe this new storage engine, its architecture, its data structures, and explain why and how it is well suited to gracefully handle high turnover rates of monitoring targets and provide consistent query performance.
A fast Message-Queue base on zookeeper.
Jafka mq is a distributed publish-subscribe messaging system cloning from Apache Kafka.
So it has following features:
(1)Persistent messaging with O(1) disk structures that provide constant time performance even with many TB of stored messages.
(2)High-throughput: even with very modest hardware single broker can support hundreds of thousands of messages per second.
(3)Explicit support for partitioning messages over broker servers and distributing consumption over a cluster of consumer machines while maintaining per-partition ordering semantics.
(4)Simple message format for many language clients.
DevOpsDays Warsaw 2015: Running High Performance And Fault Tolerant Elasticse...PROIDEA
Published on Dec 7, 2015
Speaker: Rafał Kuć
Language: English
Search engine is a perfect candidate for a microservice component inside you architecture. Docker is a perfect container that we can use to pack up Elasticsearch. In this talk we start by learning how to run Elasticsearch in a Docker containers. However, this is only the beginning. Running containerized Elasticsearch nodes and doing that effectively and at scale takes a little more knowledge and work. Sure, containers can be easily started and stopped, but how do you do that with Elasticsearch inside them? Because of that, in this talk we’ll quickly run over the basic Docker+Elasticsearch setup and focus on harder problems like: * Architecting for Elasticsearch fault tolerance and high availability in containerized setup - using sharding, replication, node and shard-awareness for keeping your cluster green * Running Elasticsearch in different modes with re-usability in mind * Optimizing and tuning Elasticsearch for popular use cases like ELK * Ops/Devops - monitoring Elasticsearch & Docker together - which metrics to watch, what they mean, how to act on them and first of all, how to watch them.
Visit our website: http://2015.devopsdays.pl
37 slides about taking care of your SolrCluster - Collections API, Core API, dynamic schema modification, segment merging, hard vs. soft commit, caches, monitoring, performance, JMX, it's all in here.
Talk about add proxy user in Spark Task execution time given in Spark Summit East 2017 by Jorge López-Malla and Abel Ricon
full video:
https://www.youtube.com/watch?v=VaU1xC0Rixo&feature=youtu.be
How and Why Prometheus' New Storage Engine Pushes the Limits of Time Series D...Docker, Inc.
The Prometheus monitoring system collects and stores time series data to give valuable insights over hosts, containers, and applications. Its storage engine was designed to be multiple orders of magnitude faster and more space efficient than, say, RRD or SQL storage. However, with the rise of orchestration systems such as Docker Swarm and Kubernetes, and their extensive use of techniques like rolling updates and auto-scaling, environments are becoming increasingly dynamic. This increases the strain on metrics collection systems. To deal with the challenges, a new storage engine has been developed from scratch, bringing a sharp increase in performance and enabling new features.
This talk will describe this new storage engine, its architecture, its data structures, and explain why and how it is well suited to gracefully handle high turnover rates of monitoring targets and provide consistent query performance.
A fast Message-Queue base on zookeeper.
Jafka mq is a distributed publish-subscribe messaging system cloning from Apache Kafka.
So it has following features:
(1)Persistent messaging with O(1) disk structures that provide constant time performance even with many TB of stored messages.
(2)High-throughput: even with very modest hardware single broker can support hundreds of thousands of messages per second.
(3)Explicit support for partitioning messages over broker servers and distributing consumption over a cluster of consumer machines while maintaining per-partition ordering semantics.
(4)Simple message format for many language clients.
DevOpsDays Warsaw 2015: Running High Performance And Fault Tolerant Elasticse...PROIDEA
Published on Dec 7, 2015
Speaker: Rafał Kuć
Language: English
Search engine is a perfect candidate for a microservice component inside you architecture. Docker is a perfect container that we can use to pack up Elasticsearch. In this talk we start by learning how to run Elasticsearch in a Docker containers. However, this is only the beginning. Running containerized Elasticsearch nodes and doing that effectively and at scale takes a little more knowledge and work. Sure, containers can be easily started and stopped, but how do you do that with Elasticsearch inside them? Because of that, in this talk we’ll quickly run over the basic Docker+Elasticsearch setup and focus on harder problems like: * Architecting for Elasticsearch fault tolerance and high availability in containerized setup - using sharding, replication, node and shard-awareness for keeping your cluster green * Running Elasticsearch in different modes with re-usability in mind * Optimizing and tuning Elasticsearch for popular use cases like ELK * Ops/Devops - monitoring Elasticsearch & Docker together - which metrics to watch, what they mean, how to act on them and first of all, how to watch them.
Visit our website: http://2015.devopsdays.pl
37 slides about taking care of your SolrCluster - Collections API, Core API, dynamic schema modification, segment merging, hard vs. soft commit, caches, monitoring, performance, JMX, it's all in here.
Talk about add proxy user in Spark Task execution time given in Spark Summit East 2017 by Jorge López-Malla and Abel Ricon
full video:
https://www.youtube.com/watch?v=VaU1xC0Rixo&feature=youtu.be
Concurrency is hard. Consistency in distributed systems is hard. And then the whole thing should be highly-available and error resilient.
Fear not, there are good news: There exists an awesome tool called ZooKeeper to help you with this. There even exists a plethora of Python libraries for it, but how to know what to use and how?
This talk will walk you through ZooKeeper and how to use it with Python. We’ll be focusing on what I think is the most prominient ZooKeeper library out there for Python: Kazoo.
You’ll see how to do things in ZooKeeper and how to implement them using Kazoo. We’ll also peek in to the recipes Kazoo offers, and if we have enough time, touch a real life application we’ve used Kazoo and ZooKeeper to build at Spotify.
ZooKeeper and Embedded ZooKeeper Support for IBM InfoSphere Streams V4.0lisanl
Yip-Hing Ng works as a senior software engineer on the Streams Platform development team. Yip's presentation describes how to setup and configure ZooKeeper for IBM InfoSphere Streams V4.0.
View related presentations and recordings from the Streams V4.0 Developers Conference at:
https://developer.ibm.com/answers/questions/183353/ibm-infosphere-streams-40-developers-conference-on.html?smartspace=streamsdev
Distributed system coordination by zookeeper and introduction to kazoo python...Jimmy Lai
Zookeeper is a coordination tool to let people build distributed systems easier. In this slides, the author summarizes the usage of zookeeper and provides Kazoo Python library as example.
[Download the slide to get the entire talk in the form of presentation note embedded in the ppt] Apache ZooKeeper is the chosen leader in distributed coordination. In this talk, I have explored the atomic elements of Apache ZooKeeper, how it fits everything together and some of its popular use cases. For ZooKeeper simplicity is the key and as a consumer of the API, our imagination enables us to push the limits of the ZooKeeper world.
ZooKeeper - wait free protocol for coordinating processesJulia Proskurnia
ZooKeeper is a service for coordinating processes within distributed systems. Stress test of the tool was applied. Reliable Multicast and Dynamic LogBack system Configuration management were implemented with ZooKeeper.
More details: http://proskurnia.in.ua/wiki/zookeeper_research
Centralized Application Configuration with Spring and Apache ZookeeperRyan Gardner
From talk given at Spring One 2gx Dallas, 2014
Application configuration is an evolution. It starts as a hard-coded strings in your application and hopefully progresses to something external, such as a file or system property that can be changed without deployment. But what happens when other enterprise concerns enter the mix, such as audit requirements or access control around who can make changes? How do you maintain the consistency of values across too many application servers to manage at one time from a terminal window? The next step in the application configuration evolution is centralized configuration that can be accessed by your applications as they move through your various environments on their way to production. Such a service transfers the ownership of configuration from the last developer who touched the code to a well-versed application owner who is responsible for the configuration of the application across all environments. At Dealer.com, we have created one such solution that relies on Apache ZooKeeper to handle the storage and coordination of the configuration data and Spring to handle to the retrieval, creation and registration of configured objects in each application. The end result is a transparent framework that provides the same configured objects that could have been created using a Spring configuration, configuration file and property value wiring. This talk will cover both the why and how of our solution, with a focus on how we leveraged the powerful attributes of both Apache ZooKeeper and Spring to rid our application of local configuration files and provide a consistent mechanism for application configuration in our enterprise.
This technical presentation by EDB Dave Thomas, Systems Engineer provides an overview of:
1) BGWriter/Writer Process
2) Wall Writer Process
3) Stats Collector Process
4) Autovacuum Launch Process
5) Syslogger Process/Logger process
6) Archiver Process
7) WAL Send/Receive Processes
After being tasked to find a "proper solution for deployments and servers configuration management", I came up with a presentation to show what configuration management is, why our current tool (SaltStack) just needed more love and a proposal for a separate "proper deployment tool", which is not covered in this presentation.
eBay has large, multi-purpose Hadoop clusters with many petabytes of data. eBay Inc?s many subsidiaries and applications give rise to fascinating, complex scenarios for authentication, audit, access control, data protection, data safety, and privacy. To fulfill these complex requirements, security is enabled on Hadoop clusters at eBay. We have been experimenting with and implementing in our production systems several techniques to 1) Set up and operate large clusters (thousands of nodes) efficiently and effectively for a thousand users, and 2)Enable security transparently without impacting user jobs or over-burdening users with inconvenient restrictions Based on our experiments, we have assembled some effective ?best? practices for deploying, operating and using secure Hadoop?clusters. In this presentation, we explain these methods and rules-of-thumb that efficiently and effectively: 1)Set up reliable, scalable Infrastructure to enable strong security for large clusters 2)Set up a very large secure Hadoop cluster in a scalable, zero-touch automated way 3)Update software and configuration on the cluster efficiently while minimizing ?drift? among machines 4)Keep Hadoop services up and running with minimum human intervention 5)Manage user Access to Hadoop clusters? 6)Control access to data and other resources 7)Process highly confidential data using map-reduce programs
This presentation was prepared for a Webcast where John Yerhot, Engine Yard US Support Lead, and Chris Kelly, Technical Evangelist at New Relic discussed how you can scale and improve the performance of your Ruby web apps. They shared detailed guidance on issues like:
Caching strategies
Slow database queries
Background processing
Profiling Ruby applications
Picking the right Ruby web server
Sharding data
Attendees will learn how to:
Gain visibility on site performance
Improve scalability and uptime
Find and fix key bottlenecks
See the on-demand replay:
http://pages.engineyard.com/6TipsforImprovingRubyApplicationPerformance.html
Docker Logging and analysing with Elastic StackJakub Hajek
Collecting logs from the entire stateless environment is challenging parts of the application lifecycle. Correlating business logs with operating system metrics to provide insights is a crucial part of the entire organization. What aspects should be considered while you design your logging solutions?
Docker Logging and analysing with Elastic Stack - Jakub Hajek PROIDEA
Collecting logs from the entire stateless environment is challenging parts of the application lifecycle. Correlating business logs with operating system metrics to provide insights is a crucial part of the entire organization. We will see the technical presentation on how to manage a large amount of the data in a typical environment with microservices.
Best practices for developing your Magento Commerce on CloudOleg Posyniak
Properly implementing Magento Commerce Cloud is critical to the success of your online store. In this session, we’ll take a look under the hood and share how to maximize the value of your Cloud project through Docker-based local development, configurations to optimize deployments, and tools for performance monitoring (New Relic), and optimization (Blackfire).
In this talk, Carlos de la Guardia shows how a Pyramid application can be deployed using a front end web server, like Apache or Nginx. He also covers how to automate deployment using buildout and a PyPI clone, and post-deployment creation of a variety of maintenance scripts and cron jobs that perform application specific tasks through Pyramid.
A link to audio of the presentation is here: http://2011ploneconference.sched.org/event/29a2f357905e4ab0fe3048c53bc1c94c
This presentation is about -
Understanding product directory structure,
Various log files written by WAS,
HPEL,
Configuring WAS classloaders,
For more details visit -
http://vibranttechnologies.co.in/websphere-classes-in-mumbai.html
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
Elevating Tactical DDD Patterns Through Object CalisthenicsDorra BARTAGUIZ
After immersing yourself in the blue book and its red counterpart, attending DDD-focused conferences, and applying tactical patterns, you're left with a crucial question: How do I ensure my design is effective? Tactical patterns within Domain-Driven Design (DDD) serve as guiding principles for creating clear and manageable domain models. However, achieving success with these patterns requires additional guidance. Interestingly, we've observed that a set of constraints initially designed for training purposes remarkably aligns with effective pattern implementation, offering a more ‘mechanical’ approach. Let's explore together how Object Calisthenics can elevate the design of your tactical DDD patterns, offering concrete help for those venturing into DDD for the first time!
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
Essentials of Automations: Optimizing FME Workflows with ParametersSafe Software
Are you looking to streamline your workflows and boost your projects’ efficiency? Do you find yourself searching for ways to add flexibility and control over your FME workflows? If so, you’re in the right place.
Join us for an insightful dive into the world of FME parameters, a critical element in optimizing workflow efficiency. This webinar marks the beginning of our three-part “Essentials of Automation” series. This first webinar is designed to equip you with the knowledge and skills to utilize parameters effectively: enhancing the flexibility, maintainability, and user control of your FME projects.
Here’s what you’ll gain:
- Essentials of FME Parameters: Understand the pivotal role of parameters, including Reader/Writer, Transformer, User, and FME Flow categories. Discover how they are the key to unlocking automation and optimization within your workflows.
- Practical Applications in FME Form: Delve into key user parameter types including choice, connections, and file URLs. Allow users to control how a workflow runs, making your workflows more reusable. Learn to import values and deliver the best user experience for your workflows while enhancing accuracy.
- Optimization Strategies in FME Flow: Explore the creation and strategic deployment of parameters in FME Flow, including the use of deployment and geometry parameters, to maximize workflow efficiency.
- Pro Tips for Success: Gain insights on parameterizing connections and leveraging new features like Conditional Visibility for clarity and simplicity.
We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
Encryption in Microsoft 365 - ExpertsLive Netherlands 2024Albert Hoitingh
In this session I delve into the encryption technology used in Microsoft 365 and Microsoft Purview. Including the concepts of Customer Key and Double Key Encryption.
Slack (or Teams) Automation for Bonterra Impact Management (fka Social Soluti...Jeffrey Haguewood
Sidekick Solutions uses Bonterra Impact Management (fka Social Solutions Apricot) and automation solutions to integrate data for business workflows.
We believe integration and automation are essential to user experience and the promise of efficient work through technology. Automation is the critical ingredient to realizing that full vision. We develop integration products and services for Bonterra Case Management software to support the deployment of automations for a variety of use cases.
This video focuses on the notifications, alerts, and approval requests using Slack for Bonterra Impact Management. The solutions covered in this webinar can also be deployed for Microsoft Teams.
Interested in deploying notification automations for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
3. Introduction
• Originally developed at Yahoo
• Centralised coordination service, including
configuration management, election, lock, and etc
ensemble
9. Cluster
• Three servers at least
• Add server list in conf/zoo.cfg and myid in dataDir
# zoo,cfg for zoo1
server.1=localhost:2666:3666
server.2=localhost:2667:3667
server.3=localhost:2668:3668
1
dataDir/myidconf/zoo.cfg
12. Queue
Put an item
1. Create a /znode /queue-A/item- with sequential flag
Pop an item
1. Get children [n,n+1,…] of /znode /queue-A
2. Delete /znode /queue-A/item-n
13. Lock
Acquire a lock
1. Create a /znode /lock/resource-m with ephemeral/sequential flag
2. Get children [n,n+1,…] of /znode /lock-
3. If /znode /lock-n is created in step 1, lock is acquired. Exit.
4. Watch /znode /lock-n (/znode /lock-(m-1)). When /znode /lock-n
deleted, go to step 2.
Release a lock
1. Delete the znode created in step 1.
14. Curator
• A high-level wrapper library
developed in Netflix originally
• Curator handles operation
retry
• Curator implements recipes
17. • Epoch proposal NEWEPOCH(e): e is new epoch
• ACK-E(e_curr, hist): e_curr is current epoch of follower and
hist is current operation history
• Leader proposal NEWLEADER(e, I): I is initial state derived
from operation histories in ACK-E
ZAB