Cassandra is a powerful NoSql database based on solid fundamentals of distributed computing and fail-safe design, and it is well-tested by companies such as Facebook, Twitter, and Netflix. Unlike conventional databases and some of the modern databases that use the master-slave pattern, Cassandra uses the all-nodes-the-same pattern; this makes the system free from a single point of failure.
Presentation that I gave as a guest lecture for a summer intensive development course at nod coworking in Dallas, TX. The presentation targets beginning web developers with little, to no experience in databases, SQL, or PostgreSQL. I cover the creation of a database, creating records, reading/querying records, updating records, destroying records, joining tables, and a brief introduction to transactions.
До выхода Feature Complete версии OpenJDK 9 EA остался месяц. Самое время посмотреть, что ждет нас в следующей версии Java. Для начала рассмотрим процесс того, как идеи становятся JEP-ами, а потом становятся частью стандарта языка Java. Потом посмотрим на список из четрех десятков фич, разберем наименее тривилаьные из них на примерах: jshell, jmh, unified jvm logging и, конечно же, модулярность.
Next-gen DevOps engineering with Docker and Kubernetes by Antons KrangaJavaDayUA
Docker is in font of container madness that forces us to rethink our entire architecture and development practices. This session will be focusing around building Java runtimes on Docker containers and running it with Kubernetes. We will focus on different deployment aspects specific to the Docker and Kubernetes and utilise DevOps engineering managed by Jenkins.
Some previous knowledge of docker is not required however advised
Stream-style messaging development with Rabbit, Active, ZeroMQ & Apache Kafka...JavaDayUA
Application performance problems traditionally solving by tuning, but what we tune in most cases? We tune DB, AS or client-side logic, right? But we usually forget about speed of message-sending mechanisms our apps use - what if our bottleneck is exactly there? In message-layer we traditionally use JMS, XML/SOAP and JSON, but is it really fast and channel capacity-safe? In that presentation we will talk about tuning of messaging systems - a modern compact formats, like MsgPack and CBOR as alternative of JSON and XML/SOAP, a modern open-source JMS-alternatives: Rebbit, Active, ZeroMQ and Apache Kafka. I`ll show you how to use it with Java 8 Stream API by real-life example to make your code short, expressive and simple to modification and support!
Presentation that I gave as a guest lecture for a summer intensive development course at nod coworking in Dallas, TX. The presentation targets beginning web developers with little, to no experience in databases, SQL, or PostgreSQL. I cover the creation of a database, creating records, reading/querying records, updating records, destroying records, joining tables, and a brief introduction to transactions.
До выхода Feature Complete версии OpenJDK 9 EA остался месяц. Самое время посмотреть, что ждет нас в следующей версии Java. Для начала рассмотрим процесс того, как идеи становятся JEP-ами, а потом становятся частью стандарта языка Java. Потом посмотрим на список из четрех десятков фич, разберем наименее тривилаьные из них на примерах: jshell, jmh, unified jvm logging и, конечно же, модулярность.
Next-gen DevOps engineering with Docker and Kubernetes by Antons KrangaJavaDayUA
Docker is in font of container madness that forces us to rethink our entire architecture and development practices. This session will be focusing around building Java runtimes on Docker containers and running it with Kubernetes. We will focus on different deployment aspects specific to the Docker and Kubernetes and utilise DevOps engineering managed by Jenkins.
Some previous knowledge of docker is not required however advised
Stream-style messaging development with Rabbit, Active, ZeroMQ & Apache Kafka...JavaDayUA
Application performance problems traditionally solving by tuning, but what we tune in most cases? We tune DB, AS or client-side logic, right? But we usually forget about speed of message-sending mechanisms our apps use - what if our bottleneck is exactly there? In message-layer we traditionally use JMS, XML/SOAP and JSON, but is it really fast and channel capacity-safe? In that presentation we will talk about tuning of messaging systems - a modern compact formats, like MsgPack and CBOR as alternative of JSON and XML/SOAP, a modern open-source JMS-alternatives: Rebbit, Active, ZeroMQ and Apache Kafka. I`ll show you how to use it with Java 8 Stream API by real-life example to make your code short, expressive and simple to modification and support!
Spark-driven audience counting by Boris TrofimovJavaDayUA
The story about Ad world and real-time segments counting. Size of data does not allow doing straightforward calculations so we will dive into the solution step-by step involving some "secret" algorithms from Google.
Writing concurrent code that is also correct is unbelievably hard. Naturally, humanity has developed a number of approaches to handle concurrency in the code, starting from basic threads that follow the hardware way to do concurrency to higher level primitives like fibers and work-stealing solutions. But which approach is the best for you? In this session, we'll take a look at a simple concurrent problem and solve it using different ways to manage concurrency: threads, executors, actors, fibers, monadic code with completable futures. All these approaches are different from the simplicity, readability, configuration and management point of view. Some scenarios are better modelled with threads, while sometimes you're better off with actors. We'll discuss the benefits of each approach and figure out when it's worth pursuing in your project.
Monitoring of developers. The necessity or self-indulgence by Oleksiy DyominJavaDayUA
Мониторингом в первую очередь озабочены администраторы, а разработчики зачастую смотрят на него с усмешкой. Вообще нужен ли он для них?
Так же будет показано почему одни график, лучше 1000 строк лога, особенно в распределенной среде.
Interactive Java Support to your tool -- The JShell API and ArchitectureJavaDayUA
Explore the JShell API. Learn how it can be used to add interactive Java expression/declaration execution to new or existing tools. See how the completion functionality can enhance code editors or analyzers. Get a behind the scenes look at the JShell architecture and its deep integration with the Java platform.
Web-application I have always dreamt of by Victor PolischukJavaDayUA
Through years of work have been trying many of Java frameworks which provides different level of abstractions on both server and client-side. Pure Servlet+JSP, JSF, GWT, Struts, Spring MVC, Vaadin, Play!, DWR, you name it. Sometimes it felt good, sometimes not, and with each year number of “good” applications reduced to the critical minimum. Later I tried to bring all the good points I had ever seen together to create “a perfect being” and after years of struggling I feel that I have reached the goal. Let me share it…
Testing in Legacy: from Rags to Riches by Taras SlipetsJavaDayUA
In this presentation I'd like to share practical experience and techniques that were used for modernization and maintaining 10+ years old legacy system: pitfalls that we've faced during that process and conclusions that we'd made when we've successfully finished updating mission.
Unlocking the Magic of Monads with Java 8JavaDayUA
This code-heavy session demystifies what monads are and outlines reasons why you would even want to introduce them into your code. We’ll take a look at the traditional definition for monads and offer a corresponding type definition in Java. We’ve selected a sample Java 8 implementation of a ‘Promise’ monad, which represents the result of async computation to help us answer practical questions about monads. Also, we'll go over the Laws of Monads and show that you can have a proper monad in Java, if you are brave enough to allow the underlying platform change the rules a bit. PS. You won’t be penalised or ridiculed during this session for your (lack of) Haskell knowledge!
Continuously building, releasing and deploying software: The Revenge of the M...JavaDayUA
We used to release one product, once a year, built by one team. Today we have teams of hundreds of developers creating a multitude of software packages that are released multiple times a day.How did that happen?! In this talk, we’ll give you the answer: As the good old advice of Computer Science goes, “If it hurts, do it more often!”. Suddenly, we realized that what we do during the “Release Month Code Freeze” is actually a lot of repeatable, automatable steps. So, we called in the machines.Now we have Continuous Integration servers controlling an exponential amount of robot developers (agents) that are building and testing our code, all day long. Continuous Deployment tools, dictating their order to robot sysadmin, deploying our software on a rapidly increasing amount of varied platforms, as frequent as we please.The Machines got their revenge, and “we, for ones, welcome our new robotic overlords”!
Java heap memory model has wasteful memory usage. References, object headers, internal collection structure, extra fields such as String.hashCode… This talk shows practical ways to reduce memory usage and fit more data into memory: primitive types, specialized java collections, bit packing, reducing number of pointers, replacing String with char[], semi-serialized objects… As bonus we get lower GC overhead by reducing number of references.
JShell: An Interactive Shell for the Java PlatformJavaDayUA
Read-Execute-Print-Loops (REPLs) have emerged as powerful tools for learning and prototyping. JShell brings this power to Java. Targeted for JDK 9, and tightly integrated with the Java compiler and virtual machine, JShell enhances the programming experience for the Java language. Learn how to use JShell to explore new APIs, prototype code, or learn the Java language. Interactively explore new features of JDK 9. See the features that speed up coding.
API first with Swagger and Scala by Slava SchmidtJavaDayUA
How does one scale the development of a service landscape in a corporate enterprise environment utilizing Typesafe's Play and Akka software stack? How does one achieve API uniformity and coherence accross dozens of development teams, getting them and their subsequently developed subsystems to play together nicely? At Zalando we believe firmly in an API first approach, founded an API guild that ratifies and supports the development of APIs, and define them in a formal manner employing the Swagger API representation language.
The Epic Groovy Puzzlers S02: The Revenge of the ParenthesesJavaDayUA
More strange, more bizarre, more fun! The Groovy Puzzlers hits with its second season in which we implemented the lesson learned from the first one – do more of the same (always as a duet)! Expect even more “NO WAY!”, “WHOA!”, “WTF!”, O_o and prizes flying around, and expect to learn more about Groovy’s darkest secrets! As usual, the traps we fell into here in JFrog and contributions from top-notch Groovy authors and users!
Science, Technology, Engineering and Mathematics, STEM, are vital to the future of our children. The parents and students in our educational systems need to understand and embrace the technology that affects them every day of their lives. Devoxx4Kids is on a global mission to complement the classical schooling system by offering workshops to kids in a fun way. and teaching them computing concepts using Scratch, Greenfoot, Minecraft, Raspberry Pi, Arduino, NAO, Tynker. We will share a path that can be followed by adults to keep kids in their vicinity engaged and build, instead of just play, games. You will learn best practices to organize similar workshops in your local setting and hear tips on opening a local chapter. This talk will be appreciated by anybody who has kids, nephews, nieces, and in general kids around them.
Virtual Private Cloud with container technologies for DevOpsJavaDayUA
DevOps with Containers in Virtual Private Cloud and Hybrid Cloud. A new opportunity for hosting providers to attract Enterprise customers. Containers have changed the mind of IT in DevOps. They enable developers to work with dev, test, stage and production environments identically. Containers provide the right abstraction for Microservices and many cloud platforms have integrated them into deployment pipelines. DevOps and Containers together help companies to achieve their business goals faster and more effectively. At this session we will review the current landscape of DevOps with Containers and the benefits for hosting providers. In addition, we will discuss known issues and solutions for enterprise applications in Containers.
MapDB - taking Java collections to the next levelJavaDayUA
Java collections have several limitations. But imagine library without limits, which could even replace your database. This session talks about drop-in replacement with many new possibilities. MapDB provides Java collections backed by in-memory or on-disk store. It adds extra features to traditional collections (entry expiration, binding, secondary collections…). It is also proper database engine and has transactions, snapshots, incremental backups… And finally it is not affected by GC, so it can take a billion entries without a hiccup.
Gamification in outsourcing company: experience report.Mikalai Alimenkou
Most of us used to hear word gamification only for end user engagement into product usage. Some of us know about usage of similar approaches in product development teams to improve and tune development process. But almost nobody believes that gamification is possible in the context of outsourcing companies and teams. This talk is experience report of gamification usage on very large project with detailed reusable framework demonstration. If you want to bring some fun and really engage your team, then this talk is for you.
Java 8 is being around for a while already and lot of us are already using Java 8 features on our projects. But do we use these great Java 8 features correctly and efficiently? Having done lots of code reviews during last years we’ve seen some common antipatterns of Java 8 features usage. In this talk we want to show you some of the examples where Java 8 features were misused or poorly used and show you how certain things could have been better implemented.
JavaFX 8 everywhere; write once run anywhere by Mohamed TamanJavaDayUA
With tens of millions of clients continuously downloading binaries from our repositories, we decided to offer an OSS client that natively supports these downloads. In this talk, we will share the main challenges in developing a highly-concurrent, resumable, async download library on top of Apache HTTP client. We will cover other libraries we tested and why we decided to reinvent the wheel. We will see important pitfalls we came across when working with HTTP and how using the right combination of techniques can improve performance by an order of magnitude. We will also see why your initial assumptions may completely change when faced with other players on the network. Consider yourself forewarned: lots of HTTP internals, NIO and concurrency ahead!
Why should we know about Spring internals? It works! So use it and enjoy! However, as always, in order to use Spring in most efficient way, you must know, what is under the fork. Only in case you really understand its internals you will be able to use all power of Spring. You will be able to customize this framework according to challenges of your project, to achieve best performance and solve any problem without applying to Spring-support center. ;) Here are several topics about Spring internals, which will be covered during this session (with examples for each one): What is Spring impact on the performance of your application? What are the phases of Spring lifecycle? What is ApplicationContext structure? “You can’t do it with Spring!” – or maybe you can?
Spark-driven audience counting by Boris TrofimovJavaDayUA
The story about Ad world and real-time segments counting. Size of data does not allow doing straightforward calculations so we will dive into the solution step-by step involving some "secret" algorithms from Google.
Writing concurrent code that is also correct is unbelievably hard. Naturally, humanity has developed a number of approaches to handle concurrency in the code, starting from basic threads that follow the hardware way to do concurrency to higher level primitives like fibers and work-stealing solutions. But which approach is the best for you? In this session, we'll take a look at a simple concurrent problem and solve it using different ways to manage concurrency: threads, executors, actors, fibers, monadic code with completable futures. All these approaches are different from the simplicity, readability, configuration and management point of view. Some scenarios are better modelled with threads, while sometimes you're better off with actors. We'll discuss the benefits of each approach and figure out when it's worth pursuing in your project.
Monitoring of developers. The necessity or self-indulgence by Oleksiy DyominJavaDayUA
Мониторингом в первую очередь озабочены администраторы, а разработчики зачастую смотрят на него с усмешкой. Вообще нужен ли он для них?
Так же будет показано почему одни график, лучше 1000 строк лога, особенно в распределенной среде.
Interactive Java Support to your tool -- The JShell API and ArchitectureJavaDayUA
Explore the JShell API. Learn how it can be used to add interactive Java expression/declaration execution to new or existing tools. See how the completion functionality can enhance code editors or analyzers. Get a behind the scenes look at the JShell architecture and its deep integration with the Java platform.
Web-application I have always dreamt of by Victor PolischukJavaDayUA
Through years of work have been trying many of Java frameworks which provides different level of abstractions on both server and client-side. Pure Servlet+JSP, JSF, GWT, Struts, Spring MVC, Vaadin, Play!, DWR, you name it. Sometimes it felt good, sometimes not, and with each year number of “good” applications reduced to the critical minimum. Later I tried to bring all the good points I had ever seen together to create “a perfect being” and after years of struggling I feel that I have reached the goal. Let me share it…
Testing in Legacy: from Rags to Riches by Taras SlipetsJavaDayUA
In this presentation I'd like to share practical experience and techniques that were used for modernization and maintaining 10+ years old legacy system: pitfalls that we've faced during that process and conclusions that we'd made when we've successfully finished updating mission.
Unlocking the Magic of Monads with Java 8JavaDayUA
This code-heavy session demystifies what monads are and outlines reasons why you would even want to introduce them into your code. We’ll take a look at the traditional definition for monads and offer a corresponding type definition in Java. We’ve selected a sample Java 8 implementation of a ‘Promise’ monad, which represents the result of async computation to help us answer practical questions about monads. Also, we'll go over the Laws of Monads and show that you can have a proper monad in Java, if you are brave enough to allow the underlying platform change the rules a bit. PS. You won’t be penalised or ridiculed during this session for your (lack of) Haskell knowledge!
Continuously building, releasing and deploying software: The Revenge of the M...JavaDayUA
We used to release one product, once a year, built by one team. Today we have teams of hundreds of developers creating a multitude of software packages that are released multiple times a day.How did that happen?! In this talk, we’ll give you the answer: As the good old advice of Computer Science goes, “If it hurts, do it more often!”. Suddenly, we realized that what we do during the “Release Month Code Freeze” is actually a lot of repeatable, automatable steps. So, we called in the machines.Now we have Continuous Integration servers controlling an exponential amount of robot developers (agents) that are building and testing our code, all day long. Continuous Deployment tools, dictating their order to robot sysadmin, deploying our software on a rapidly increasing amount of varied platforms, as frequent as we please.The Machines got their revenge, and “we, for ones, welcome our new robotic overlords”!
Java heap memory model has wasteful memory usage. References, object headers, internal collection structure, extra fields such as String.hashCode… This talk shows practical ways to reduce memory usage and fit more data into memory: primitive types, specialized java collections, bit packing, reducing number of pointers, replacing String with char[], semi-serialized objects… As bonus we get lower GC overhead by reducing number of references.
JShell: An Interactive Shell for the Java PlatformJavaDayUA
Read-Execute-Print-Loops (REPLs) have emerged as powerful tools for learning and prototyping. JShell brings this power to Java. Targeted for JDK 9, and tightly integrated with the Java compiler and virtual machine, JShell enhances the programming experience for the Java language. Learn how to use JShell to explore new APIs, prototype code, or learn the Java language. Interactively explore new features of JDK 9. See the features that speed up coding.
API first with Swagger and Scala by Slava SchmidtJavaDayUA
How does one scale the development of a service landscape in a corporate enterprise environment utilizing Typesafe's Play and Akka software stack? How does one achieve API uniformity and coherence accross dozens of development teams, getting them and their subsequently developed subsystems to play together nicely? At Zalando we believe firmly in an API first approach, founded an API guild that ratifies and supports the development of APIs, and define them in a formal manner employing the Swagger API representation language.
The Epic Groovy Puzzlers S02: The Revenge of the ParenthesesJavaDayUA
More strange, more bizarre, more fun! The Groovy Puzzlers hits with its second season in which we implemented the lesson learned from the first one – do more of the same (always as a duet)! Expect even more “NO WAY!”, “WHOA!”, “WTF!”, O_o and prizes flying around, and expect to learn more about Groovy’s darkest secrets! As usual, the traps we fell into here in JFrog and contributions from top-notch Groovy authors and users!
Science, Technology, Engineering and Mathematics, STEM, are vital to the future of our children. The parents and students in our educational systems need to understand and embrace the technology that affects them every day of their lives. Devoxx4Kids is on a global mission to complement the classical schooling system by offering workshops to kids in a fun way. and teaching them computing concepts using Scratch, Greenfoot, Minecraft, Raspberry Pi, Arduino, NAO, Tynker. We will share a path that can be followed by adults to keep kids in their vicinity engaged and build, instead of just play, games. You will learn best practices to organize similar workshops in your local setting and hear tips on opening a local chapter. This talk will be appreciated by anybody who has kids, nephews, nieces, and in general kids around them.
Virtual Private Cloud with container technologies for DevOpsJavaDayUA
DevOps with Containers in Virtual Private Cloud and Hybrid Cloud. A new opportunity for hosting providers to attract Enterprise customers. Containers have changed the mind of IT in DevOps. They enable developers to work with dev, test, stage and production environments identically. Containers provide the right abstraction for Microservices and many cloud platforms have integrated them into deployment pipelines. DevOps and Containers together help companies to achieve their business goals faster and more effectively. At this session we will review the current landscape of DevOps with Containers and the benefits for hosting providers. In addition, we will discuss known issues and solutions for enterprise applications in Containers.
MapDB - taking Java collections to the next levelJavaDayUA
Java collections have several limitations. But imagine library without limits, which could even replace your database. This session talks about drop-in replacement with many new possibilities. MapDB provides Java collections backed by in-memory or on-disk store. It adds extra features to traditional collections (entry expiration, binding, secondary collections…). It is also proper database engine and has transactions, snapshots, incremental backups… And finally it is not affected by GC, so it can take a billion entries without a hiccup.
Gamification in outsourcing company: experience report.Mikalai Alimenkou
Most of us used to hear word gamification only for end user engagement into product usage. Some of us know about usage of similar approaches in product development teams to improve and tune development process. But almost nobody believes that gamification is possible in the context of outsourcing companies and teams. This talk is experience report of gamification usage on very large project with detailed reusable framework demonstration. If you want to bring some fun and really engage your team, then this talk is for you.
Java 8 is being around for a while already and lot of us are already using Java 8 features on our projects. But do we use these great Java 8 features correctly and efficiently? Having done lots of code reviews during last years we’ve seen some common antipatterns of Java 8 features usage. In this talk we want to show you some of the examples where Java 8 features were misused or poorly used and show you how certain things could have been better implemented.
JavaFX 8 everywhere; write once run anywhere by Mohamed TamanJavaDayUA
With tens of millions of clients continuously downloading binaries from our repositories, we decided to offer an OSS client that natively supports these downloads. In this talk, we will share the main challenges in developing a highly-concurrent, resumable, async download library on top of Apache HTTP client. We will cover other libraries we tested and why we decided to reinvent the wheel. We will see important pitfalls we came across when working with HTTP and how using the right combination of techniques can improve performance by an order of magnitude. We will also see why your initial assumptions may completely change when faced with other players on the network. Consider yourself forewarned: lots of HTTP internals, NIO and concurrency ahead!
Why should we know about Spring internals? It works! So use it and enjoy! However, as always, in order to use Spring in most efficient way, you must know, what is under the fork. Only in case you really understand its internals you will be able to use all power of Spring. You will be able to customize this framework according to challenges of your project, to achieve best performance and solve any problem without applying to Spring-support center. ;) Here are several topics about Spring internals, which will be covered during this session (with examples for each one): What is Spring impact on the performance of your application? What are the phases of Spring lifecycle? What is ApplicationContext structure? “You can’t do it with Spring!” – or maybe you can?
A presentation to introduce the Lobos project made at the Bonjure group meeing on 2011/01/21. For more information on Lobos, visit the website: http://budu.github.com/lobos/
Lightning Fast Analytics with Cassandra and SparkTim Vincent
Presentation on the integration of Apache Cassandra with Apache Spark to deliver near real-time analytics against operational data in your Cassandra distributed database
Introduciton to Apache Cassandra for Java Developers (JavaOne)zznate
The database industry has been abuzz over the past year about NoSQL databases. Apache Cassandra, which has quickly emerged as a best-of-breed solution in this space, is used at many companies to achieve unprecedented scale while maintaining streamlined operations.
This presentation goes beyond the hype, buzzwords, and rehashed slides and actually presents the attendees with a hands-on, step-by-step tutorial on how to write a Java application on top of Apache Cassandra. It focuses on concepts such as idempotence, tunable consistency, and shared-nothing clusters to help attendees get started with Apache Cassandra quickly while avoiding common pitfalls.
The presentation has a quick preamble on SQL injection definition, sqlmap and its key features.
I then illustrate into details common and uncommon problems and respective solutions with examples that a penetration tester faces when he wants to take advantage of any kind of web application SQL injection flaw on real world web applications, for instance SQL injection in ORDER BY and LIMIT clauses, single entry UNION query SQL injection, specific web application technologies IDS bypasses and more.
These slides have been presented at the Front Range OWASP Conference in Denver on March 5, 2009.
From Postgres to Cassandra (Rimas Silkaitis, Heroku) | C* Summit 2016DataStax
Most web applications start out with a Postgres database and it serves the application very well for an extended period of time. Based on type of application, the data model of the app will have a table that tracks some kind of state for either objects in the system or the users of the application. Names for this table include logs, messages or events. The growth in the number of rows in this table is not linear as the traffic to the app increases, it's typically exponential.
Over time, the state table will increasingly become the bulk of the data volume in Postgres, think terabytes, and become increasingly hard to query. This use case can be characterized as the one-big-table problem. In this situation, it makes sense to move that table out of Postgres and into Cassandra. This talk will walk through the conceptual differences between the two systems, a bit of data modeling, as well as advice on making the conversion.
About the Speaker
Rimas Silkaitis Product Manager, Heroku
Rimas currently runs Product for Heroku Postgres and Heroku Redis but the common thread throughout his career is data. From data analysis, building data warehouses and ultimately building data products, he's held various positions that have allowed him to see the challenges of working with data at all levels of an organization. This experience spans the smallest of startups to the biggest enterprises.
Big Data Day LA 2015 - Compiling DSLs for Diverse Execution Environments by Z...Data Con LA
Data transformation has traditionally required expertise in specialized data platforms and typically been restricted to the domain of IT. A domain specific language (DSL) separates the user’s intent from a specific implementation, while maintaining expressivity. A user interface can be used to produce these expressions, in the form of suggestions, without requiring the user to manually write code. This higher level interaction, aided by transformation previews and suggestion ranking allows domain experts such as data scientists and business analysts to wrangle data while leveraging the optimal processing framework for the data at hand.
This presentation explain about "Apache Cassandra's concepts and architecture".
My friends and colleagues said
"This presentation should be release on public space to help many peoples work in IT"
so, I upload this file for everyone love "Technology for the people"
This presentation used for educating the employee of KT last year.
These are the slides from my presentation at MySQL Conference and Expo 2007 held in Santa Clara, CA. The talk was focused on scaling InnoDB to meet Fotolog's unique challenges.
Apache Cassandra, part 1 – principles, data modelAndrey Lomakin
Aim of this presentation to provide enough information for enterprise architect to choose whether Cassandra will be project data store. Presentation describes each nuance of Cassandra architecture and ways to design data and work with them.
These are the outline slides that I used for the Pune Clojure Course.
The slides may not be much useful standalone, but I have uploaded them for reference.
This keynote will be a historical trip down memory lane - going through 20 years of Java and JVM implementations. This will be partly from Marcus’s own perspective as one of the architects behind JRockit, with plenty of stories from the trenches, like the benchmarking competitions between BEA/Oracle, Sun and IBM. We will see how Java and the JVM turned into the robust high performance server side platform that it is today, partly through personal observations and partly through a more objective “what a long strange trip this has been”. He will take you back to 1995 in a time machine and slowly bring you to 2014, going over the major Java releases and the runtime innovations made in the JVM side to get us here. Finally, we will do a short trip into the future, even though the future is always fuzzy, to explore what might be coming next. With Java 8, the biggest release in Java history, Java is more vibrant and alive than ever before. This is an evolution that won’t be stopped.
As developers we always look for ways to do things faster, better, and automate as much as possible. We write code in top-notch IDEs that have static code analysis, automatic refactoring and so on, we run unit tests, we use CI servers, and issue trackers, we adopt agile practices to get feedback and deliver as fast as possible. As far as code review practice goes, there’s still a lot to be improved, and in this talk I’m going to tell you how you can perform efficient, transparent and useful code reviews.
The JRockit JVM was originally developed by Appeal Virtual Machines as a from scratch server-side JVM in order to compete with HotSpot from Sun Microsystems. Appeal Virtual Machines was acquired by BEA Systems in 2002, which in turn became part of Oracle in 2010. JRockit is battle proven in the commercial space as a high performance server JVM and has unique monitoring and manageability capabilities for doing zero overhead instrumentation of production systems. This talk covers the design rationales that the JRockit architects did in code generation, memory management, synchronization and serviceability. The JRockit and HotSpot JVMs are currently in the process of being merged into one code base, most of which will be part of the OpenJDK.
Solution Architecture tips & tricks by Roman ShramkovJavaDayUA
In this presentation we will cover:
* What is Solution Architecture and how it differs from other architectures
* What is good and what is bad for SA, tips & tricks from our experience
Reactive programming and Hystrix fault tolerance by Max MyslyvtsevJavaDayUA
Reactive programming is a new paradigm that provides asynchronous event-based flow control. Java implementation is called rxJava and is being developed by Netfix. They have also released Hystrix — a non-functional layer that provides fault tolerance and latency features which also exposes reactive API.
From REST to Hypermedia APIs with Spring by Vladimir TsukurJavaDayUA
Typical way to design and expose HTTP API today is a so called CRUD approach: come up with URL templates for resources, map create-read-update-delete operations to HTTP verbs and serialize domain model as JSON. This approach is nice and easy, but has its severe limitations.
In this talk we'll create an application enhancing its primitive CRUD API all the way to modern, business-centric hypermedia style API using a set of tools from Spring, namely Spring Boot, Spring Data REST, Spring HATEOAS and Spring REST Docs!
Everything you wanted to know about writing async, high-concurrency HTTP apps...JavaDayUA
With tens of millions of clients continuously downloading binaries from our repositories, we decided to offer an OSS client that natively supports these downloads. In this talk, we will share the main challenges in developing a highly-concurrent, resumable, async download library on top of Apache HTTP client. We will cover other libraries we tested and why we decided to reinvent the wheel. We will see important pitfalls we came across when working with HTTP and how using the right combination of techniques can improve performance by an order of magnitude. We will also see why your initial assumptions may completely change when faced with other players on the network. Consider yourself forewarned: lots of HTTP internals, NIO and concurrency ahead!
Micro-services have been getting a lot of attention in the past year, but is it really a viable solution or just a passing fad? In this presentation we'll look deep into Bintray.com 's service architecture and talk about how and why we found ourselves naturally migrating from a central web application to a flock of micro-services.
Paintfree Object-Document Mapping for MongoDB by Philipp KrennJavaDayUA
This talk is based on heated discussions about the syntax of asserts. Do you like the good old `assertNotEquals(id, c.getId())` or do you prefer something fancier like `assertThat(id, is(not(equalTo(c.getId()))))`? We will take a quick look at the differences between asserts in JUnit, TestNG, Hamcrest, fest, AssertJ, and Spock. This topic is at least as important as Vim vs Emacs and tabs vs spaces!
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
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.
Kubernetes & AI - Beauty and the Beast !?! @KCD Istanbul 2024Tobias Schneck
As AI technology is pushing into IT I was wondering myself, as an “infrastructure container kubernetes guy”, how get this fancy AI technology get managed from an infrastructure operational view? Is it possible to apply our lovely cloud native principals as well? What benefit’s both technologies could bring to each other?
Let me take this questions and provide you a short journey through existing deployment models and use cases for AI software. On practical examples, we discuss what cloud/on-premise strategy we may need for applying it to our own infrastructure to get it to work from an enterprise perspective. I want to give an overview about infrastructure requirements and technologies, what could be beneficial or limiting your AI use cases in an enterprise environment. An interactive Demo will give you some insides, what approaches I got already working for real.
Let's dive deeper into the world of ODC! Ricardo Alves (OutSystems) will join us to tell all about the new Data Fabric. After that, Sezen de Bruijn (OutSystems) will get into the details on how to best design a sturdy architecture within ODC.
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.
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
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.
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/
JMeter webinar - integration with InfluxDB and GrafanaRTTS
Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
34. Row cache
Not write-through
Off-heap
Misuse exhausts the JVM heap
35. Partition key cache
Where the partition is located on disk
Decreasing seek times
Enabled by default
36. CQL
ALTER ( keyspace, table, type, user )
CREATE (keyspace, table, trigger, user )
SELECT
INSERT
UPDATE
DELETE
TRUNCATE
DROP ( keyspace, table, trigger, user )
GRANT
REVOKE
37. CREATE TABLE user (
user_id int,
. . .
group text,
PRIMARY KEY(user_id)
);
CREATE INDEX ON user (group) ;
SELECT * FROM user WHERE group = 'specified_group’ ;
Secondary index
39. CREATE TABLE car_owner (
group text ,
owner text,
model text,
. . .
PRIMARY KEY ( group, owner ));
group | owner | model
major | Ben Affleck | Ferrari
major | Vin Diesel | Bugatti
minor | Sebastian Druid | Opel
CREATE INDEX ON car_owner ( model ) ;
SELECT * FROM car_owner where group = 'major' and model= 'Ferrari';
Secondary index
