This is a story about how we struggled to implement strict latency requirements in a service implemented with Scala and Netty. And how we managed to do that.
The most common latency contributors are an in-process locking, thread scheduling, I/O, algorithmic inefficiencies and, of course, garbage collector.
I will share our experience of dealing with the causes. And tell what you can do to prevent them from affecting the production.
Java zone 2015 How to make life with kafka easier.Krzysztof Debski
You’ve just set up your Kafka cluster and now you are ready to process tens of thousands events per second. You decoupled your architecture and now all the communication goes via pubSub bus and you can focus only on providing business value. It would be great if that can be true. In real life you need to do a lot of tweaks to have your backbone ready to handle all the traffic you want.
This is a story about how we struggled to implement strict latency requirements in a service implemented with Scala and Netty. And how we managed to do that.
The most common latency contributors are an in-process locking, thread scheduling, I/O, algorithmic inefficiencies and, of course, garbage collector.
I will share our experience of dealing with the causes. And tell what you can do to prevent them from affecting the production.
Java zone 2015 How to make life with kafka easier.Krzysztof Debski
You’ve just set up your Kafka cluster and now you are ready to process tens of thousands events per second. You decoupled your architecture and now all the communication goes via pubSub bus and you can focus only on providing business value. It would be great if that can be true. In real life you need to do a lot of tweaks to have your backbone ready to handle all the traffic you want.
Presentation from JavaOne 2017 - CON3214
The Reactive Manifesto states that "reactive systems" are responsive, resilient, elastic and message driven. In this demo-heavy session, you will see why Ruby is great for building reactive micro services, how JRuby and the JVM provide a reliable and performant runtime for these services, and how they can easily be deployed with Docker and Docker Swarm.
In this session we will cover wide area replica sets and using tags for backup. Attendees should be well versed in basic replication and familiar with concepts in the morning's basic replication talk. No beginner topics will be covered in this session
Slides for my talk at BCN WordCamp 2016. Improve the performance of WordPress installations by using the right tool at every corresponding level in the technology stack.
On the way to low latency (2nd edition)Artem Orobets
This is the second edition of the story about how we struggled to implement strict latency requirements in a service implemented with Java and how we managed to do that.
The most common latency contributors are an in-process locking, thread scheduling, I/O, algorithmic inefficiencies and, of course, garbage collector.
I will share our experience of dealing with the causes. And tell what you can do to prevent them from affecting the production.
DNS High-Availability Tools - Open-Source Load Balancing SolutionsMen and Mice
The DNS protocol has built-in high availability for authoritative DNS servers (this will be better explained in the webinar!), but client machines can see a degraded DNS service if a DNS resolver (caching DNS server) is failing.
In this webinar, we will look into how the DNS clients in popular operating systems (Windows, Linux, macOS/iOS) choose the DNS resolver among a list of available servers, and how a DNS resolver service can be made failure-tolerant with open-source solutions such as “dnsdist” from PowerDNS and “relayd” from OpenBSD.
JDD2015: Make your world event driven - Krzysztof DębskiPROIDEA
MAKE YOUR WORLD EVENT DRIVEN
Just after you set up your first microservice you realize that the game has just started. You need to improve latency in your application and reduce unnecessary communication.
To make your architecture fully decoupled you need to embrace asynchronous communication. Good way to achieve that is to switch to Event Driven Architecture.
We will see how to use Kafka in your microservices. We will also cover some pitfalls you might face during using Kafka and how to deal with them.
After the talk you will know the toolset that are need to improve your microservice ecosystem.
Presentation from JavaOne 2017 - CON3214
The Reactive Manifesto states that "reactive systems" are responsive, resilient, elastic and message driven. In this demo-heavy session, you will see why Ruby is great for building reactive micro services, how JRuby and the JVM provide a reliable and performant runtime for these services, and how they can easily be deployed with Docker and Docker Swarm.
In this session we will cover wide area replica sets and using tags for backup. Attendees should be well versed in basic replication and familiar with concepts in the morning's basic replication talk. No beginner topics will be covered in this session
Slides for my talk at BCN WordCamp 2016. Improve the performance of WordPress installations by using the right tool at every corresponding level in the technology stack.
On the way to low latency (2nd edition)Artem Orobets
This is the second edition of the story about how we struggled to implement strict latency requirements in a service implemented with Java and how we managed to do that.
The most common latency contributors are an in-process locking, thread scheduling, I/O, algorithmic inefficiencies and, of course, garbage collector.
I will share our experience of dealing with the causes. And tell what you can do to prevent them from affecting the production.
DNS High-Availability Tools - Open-Source Load Balancing SolutionsMen and Mice
The DNS protocol has built-in high availability for authoritative DNS servers (this will be better explained in the webinar!), but client machines can see a degraded DNS service if a DNS resolver (caching DNS server) is failing.
In this webinar, we will look into how the DNS clients in popular operating systems (Windows, Linux, macOS/iOS) choose the DNS resolver among a list of available servers, and how a DNS resolver service can be made failure-tolerant with open-source solutions such as “dnsdist” from PowerDNS and “relayd” from OpenBSD.
JDD2015: Make your world event driven - Krzysztof DębskiPROIDEA
MAKE YOUR WORLD EVENT DRIVEN
Just after you set up your first microservice you realize that the game has just started. You need to improve latency in your application and reduce unnecessary communication.
To make your architecture fully decoupled you need to embrace asynchronous communication. Good way to achieve that is to switch to Event Driven Architecture.
We will see how to use Kafka in your microservices. We will also cover some pitfalls you might face during using Kafka and how to deal with them.
After the talk you will know the toolset that are need to improve your microservice ecosystem.
How MySQL become an Internet standard? based on a presentation I gave at the Database2011 conference: Who uses MySQL? (everyone inc. Facebook, Twitter and Google), What are MySQL limitations? (multi threading, INSERTS, SELECTS), How the big boys solved these issues? (Sharding, Partitioning), What are the pros and cons for each Sharding strategy? (Vertical, Horizonal: directory based, static hashing, signature based), How to implement Sharding from an applicative view? How to take care of reporting? What are the emerging solutions in this field? (Gizzard, ScaleBase, Xeround and Akibian)
Slides for my talk at SkyCon'12 in Limerick.
Here I've squeezed four talks into one, covering a lot of ground quickly, so I've included links to more detailed presentations and other resources.
There are many common workloads in R that are "embarrassingly parallel": group-by analyses, simulations, and cross-validation of models are just a few examples. In this talk I'll describe several techniques available in R to speed up workloads like these, by running multiple iterations simultaneously, in parallel.
Many of these techniques require the use of a cluster of machines running R, and I'll provide examples of using cloud-based services to provision clusters for parallel computations. In particular, I will describe how you can use the SparklyR package to distribute data manipulations using the dplyr syntax, on a cluster of servers provisioned in the Azure cloud.
Presented by David Smith at Data Day Texas in Austin, January 27 2018.
Quick, what do memcache, MogileFS, and Gearman have in common? They are scalable, distributed technologies, and they can also interface with PHP, your ubiquitous web development language. Digg uses all 3 (and a few more) in its quest for social news domination, and this presentation shares what we’ve learned about them and how they are best utilized with PHP.
Hiveminder - Everything but the Secret SauceJesse Vincent
Ten tools and techniques to help you:
Find bugs faster バグの検出をもっと素早く
Build web apps ウェブアプリの構築
Ship software ソフトのリリース
Get input from users ユーザからの入力を受けつける
Own the Inbox 受信箱を用意する
今日の話
HBaseCon2017 gohbase: Pure Go HBase ClientHBaseCon
gohbase is an implementation of an HBase client in pure Go: https://github.com/tsuna/gohbase. In this presentation we'll talk about its architecture and compare its performance against the native Java HBase client as well as AsyncHBase (http://opentsdb.github.io/asynchbase/) and some nice characteristics of golang that resulted in a simpler implementation.
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!
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.
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
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.
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.
Neuro-symbolic is not enough, we need neuro-*semantic*Frank van Harmelen
Neuro-symbolic (NeSy) AI is on the rise. However, simply machine learning on just any symbolic structure is not sufficient to really harvest the gains of NeSy. These will only be gained when the symbolic structures have an actual semantics. I give an operational definition of semantics as “predictable inference”.
All of this illustrated with link prediction over knowledge graphs, but the argument is general.
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
Connector Corner: Automate dynamic content and events by pushing a buttonDianaGray10
Here is something new! In our next Connector Corner webinar, we will demonstrate how you can use a single workflow to:
Create a campaign using Mailchimp with merge tags/fields
Send an interactive Slack channel message (using buttons)
Have the message received by managers and peers along with a test email for review
But there’s more:
In a second workflow supporting the same use case, you’ll see:
Your campaign sent to target colleagues for approval
If the “Approve” button is clicked, a Jira/Zendesk ticket is created for the marketing design team
But—if the “Reject” button is pushed, colleagues will be alerted via Slack message
Join us to learn more about this new, human-in-the-loop capability, brought to you by Integration Service connectors.
And...
Speakers:
Akshay Agnihotri, Product Manager
Charlie Greenberg, Host
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
39. pmap(Fun, List, ReturnNum) ->
N = if
ReturnNum > length(List) -> length(List);
true -> ReturnNum
end,
SuperParent = self(),
SuperRef = erlang:make_ref(),
Ref = erlang:make_ref(),
%% we spawn an intermediary to collect the results
%% this is so that there will be no leaked messages sitting in our mailbox
Parent = spawn(fun() ->
L = gather(N, length(List), Ref, []),
SuperParent ! {SuperRef, pmap_sort(List, L)}
end),
Pids = [spawn(fun() ->
Parent ! {Ref, {Elem, (catch Fun(Elem))}}
end) || Elem <- List],
Ret = receive
{SuperRef, Ret} -> Ret
end,
% i think we need to cleanup here.
lists:foreach(fun(P) -> exit(P, die) end, Pids),
43. • Receive join notification
• Recalculate partition to node mapping
• Start bootstrap routines
• Stops old local storage servers
• Starts new local storage servers
• Install the new partition table
62. Problems
• New partitions online before they are
ready
• A priori knowledge of what is running
• Possible to dilute a cluster into uselessness
• Migrations are tremendously painful
63. Direction
• Storage servers rally with local membership
server
• Use monitors on local storage
• Alerts for dangerous situations
