The document provides an agenda for a class that includes discussing "Our Energy Thoughts", collecting "Scenes" from students at the end of class, and assigning homework to cover a new textbook by Monday.
This document celebrates the birth of a baby girl named Maggie Grace Dennis on October 10, 2010. It also includes photos and references to Maggie's father, Mr. Dennis, from when he was a baby and young child, showing his progression from "Baby Mr. Dennis" to "Little Mr. Dennis" to just "Mr. Dennis." The document expresses how cute Mr. Dennis was as a baby and hints that he may have been a fan of the Villanova Wildcats sports team.
This document provides instructions for a student to print out and complete a biome pamphlet homework assignment. It lists the assignment as a "Biomes Pamphlet" and encourages the student to take advantage of an "EARLY BIRD SPECIAL" by printing and finishing the assignment today. No other group work is mentioned.
This document provides instructions for a student to print a biome pamphlet homework assignment. It lists "Biome Pamphlet" under the agenda and notes an "EARLY BIRD SPECIAL" discount for printing it tomorrow. It also asks if there is any group work required in addition to the individual biome pamphlet assignment.
This document provides homework assignments for students, including finishing a biomes coloring map, researching three biomes using a worksheet, and completing a biomes pamphlet packet. The agenda outlines finishing assignments on biome maps and worksheets as well as working on a pamphlet. No group work is listed as homework.
This document provides an agenda for a class that includes coloring a biomes map and selecting biomes, with materials including a pen/pencil, colored pencils if available, and textbook page 48. Homework assigned is to finish a section on secondary succession.
Students are asked to finish their secondary succession homework from the previous day by completing a worksheet on the topic and drawing diagrams using colored pencils if available. The agenda is to finish work on primary succession and organize and draw diagrams related to secondary succession.
The water cycle describes how water is distributed and circulates between the atmosphere, land, and oceans. Water evaporates from the surface of oceans, lakes, and vegetation and forms water vapor in the atmosphere. Water vapor condenses to form clouds and precipitation, which falls back to Earth as rain or snow and collects in lakes, rivers, and groundwater or soils before returning to the oceans, completing the cycle.
The document instructs the reader to design their own water cycle diagram using words, pictures and arrows. It lists elements that must be included such as pictures of water storage areas and words related to the water cycle like evaporation, precipitation, transpiration, groundwater, runoff, infiltration and condensation. The reader is directed to page 30 for additional help in completing the diagram.
This document celebrates the birth of a baby girl named Maggie Grace Dennis on October 10, 2010. It also includes photos and references to Maggie's father, Mr. Dennis, from when he was a baby and young child, showing his progression from "Baby Mr. Dennis" to "Little Mr. Dennis" to just "Mr. Dennis." The document expresses how cute Mr. Dennis was as a baby and hints that he may have been a fan of the Villanova Wildcats sports team.
This document provides instructions for a student to print out and complete a biome pamphlet homework assignment. It lists the assignment as a "Biomes Pamphlet" and encourages the student to take advantage of an "EARLY BIRD SPECIAL" by printing and finishing the assignment today. No other group work is mentioned.
This document provides instructions for a student to print a biome pamphlet homework assignment. It lists "Biome Pamphlet" under the agenda and notes an "EARLY BIRD SPECIAL" discount for printing it tomorrow. It also asks if there is any group work required in addition to the individual biome pamphlet assignment.
This document provides homework assignments for students, including finishing a biomes coloring map, researching three biomes using a worksheet, and completing a biomes pamphlet packet. The agenda outlines finishing assignments on biome maps and worksheets as well as working on a pamphlet. No group work is listed as homework.
This document provides an agenda for a class that includes coloring a biomes map and selecting biomes, with materials including a pen/pencil, colored pencils if available, and textbook page 48. Homework assigned is to finish a section on secondary succession.
Students are asked to finish their secondary succession homework from the previous day by completing a worksheet on the topic and drawing diagrams using colored pencils if available. The agenda is to finish work on primary succession and organize and draw diagrams related to secondary succession.
The water cycle describes how water is distributed and circulates between the atmosphere, land, and oceans. Water evaporates from the surface of oceans, lakes, and vegetation and forms water vapor in the atmosphere. Water vapor condenses to form clouds and precipitation, which falls back to Earth as rain or snow and collects in lakes, rivers, and groundwater or soils before returning to the oceans, completing the cycle.
The document instructs the reader to design their own water cycle diagram using words, pictures and arrows. It lists elements that must be included such as pictures of water storage areas and words related to the water cycle like evaporation, precipitation, transpiration, groundwater, runoff, infiltration and condensation. The reader is directed to page 30 for additional help in completing the diagram.
The document outlines an agenda for an activity where students will design their own water cycle and various water cycle activities. It also notes that designing their own water cycle is due on Friday and reminds students to bring a snack.
The document provides an agenda for a class that includes learning about the EPA Carbon Cycle from an online resource and notes there is no homework assigned. It also lists some items to take out such as a pen/pencil and offers the option to design a water cycle if finished with weekend homework.
The document lists items students should take out for school including a pen/pencil and assignment book. It also lists an agenda item for Earth Day 2010 on 4/22/2010 and mentions homework. Finally, it offers optional extra credit for students who bring a trashless lunch to class by Monday and specifies which periods should bring it to the teacher during homeroom.
This document provides an agenda for a class that includes watching an animation on the nitrogen cycle, completing a nitrogen cycle passport, diagramming the nitrogen cycle, and lists optional extra credit of bringing a trashless lunch on Monday.
This document provides an agenda for an ecology class that includes reviewing the carbon cycle from a previous worksheet, watching an animation on the nitrogen cycle, completing a nitrogen cycle passport activity, and viewing an online resource about ecology. There is no homework assigned.
The document provides an agenda for a class that includes learning about the nitrogen cycle by moving around the room and finishing a worksheet on plants, with optional extra credit for bringing a trashless lunch by Monday and turning it in during homeroom.
The document is an agenda for a class that includes finishing a reading assignment on symbiosis and answering questions, followed by watching two educational videos about unusual animal behaviors and parasites.
The document appears to be an agenda or schedule for a class that will discuss the water cycle on pages 30 of an assignment book, include designing their own water cycle, and reminds students to bring a snack for the class. The homework is listed as simple and the water cycle is described as clean and easy.
Parasitism describes a symbiotic relationship where one organism, the parasite, benefits while harming the other, the host. Common human parasites include ticks, tapeworms, and roundworms. Cuckoos are avian brood parasites that lay their eggs in the nests of other bird species like reed warblers. The cuckoo chick then evicts the host's eggs and chicks from the nest to monopolize all food from the host parents.
Predators like lions have adaptations for hunting like speed, claws and sharp teeth. Prey animals have camouflage and mimicry to avoid detection from predators. This document discusses the adaptations predators and prey have developed to hunt or avoid being hunted in the wild.
Symbiosis and Cuckoo article discusses symbiotic relationships and cuckoo birds. It encourages readers to annotate what they already know, important information, points of confusion, and anything that contradicts previous knowledge while reading the article. The annotations help readers identify key points and better understand the content.
Mr. Dennis' classes are scheduled to meet in the library today. A note indicates that all of Mr. Dennis' classes will be held in the library on March 31, 2010 rather than their usual classrooms. The brief message effectively communicates to students where to find their classes for that date.
The document appears to be a graph showing population numbers over time. It has two unlabeled axes that are likely time on the x-axis and population in thousands on the y-axis. The graph shows a curve indicating that the population increased steadily over the period of time represented.
The document is a student's agenda for an upcoming class. It lists supplies needed including a pen or pencil and a specific textbook page. The agenda notes the class will continue a discussion on animal relationships and provides the date.
The document discusses a district performance assessment scheduled for Friday. It will include a review of the district performance assessment. No other details are provided about the content or format of the assessment or review.
The document discusses a district performance assessment review scheduled for Friday March 24th, 2010. It will include a review of the district performance assessment. Students are reminded that the district performance assessment is this Friday.
The document discusses energy pyramids and food pyramids. An energy pyramid shows that there is less available energy the higher up in the food chain you go, as organisms use energy. A food pyramid recommends eating more of the foods at the bottom of the pyramid than the top, as those foods provide more "good energy." The document asks if it would be healthy to eat according to an inverted food pyramid or for an ecosystem to have an inverted energy pyramid.
This document defines and provides examples of different types of animal relationships: competition occurs when animals try to use the same resources, predator/prey relationships involve one animal eating another, symbiosis describes long-term interactions that benefit both species, and coevolution is long-term changes in species due to their close relationship.
The document discusses a district performance assessment scheduled for Friday. It lists an agenda to finish a project called WILD CATS and review for the district performance assessment happening on March 23, 2010.
Lee Barnes - Path to Becoming an Effective Test Automation Engineer.pdfleebarnesutopia
So… you want to become a Test Automation Engineer (or hire and develop one)? While there’s quite a bit of information available about important technical and tool skills to master, there’s not enough discussion around the path to becoming an effective Test Automation Engineer that knows how to add VALUE. In my experience this had led to a proliferation of engineers who are proficient with tools and building frameworks but have skill and knowledge gaps, especially in software testing, that reduce the value they deliver with test automation.
In this talk, Lee will share his lessons learned from over 30 years of working with, and mentoring, hundreds of Test Automation Engineers. Whether you’re looking to get started in test automation or just want to improve your trade, this talk will give you a solid foundation and roadmap for ensuring your test automation efforts continuously add value. This talk is equally valuable for both aspiring Test Automation Engineers and those managing them! All attendees will take away a set of key foundational knowledge and a high-level learning path for leveling up test automation skills and ensuring they add value to their organizations.
inQuba Webinar Mastering Customer Journey Management with Dr Graham HillLizaNolte
HERE IS YOUR WEBINAR CONTENT! 'Mastering Customer Journey Management with Dr. Graham Hill'. We hope you find the webinar recording both insightful and enjoyable.
In this webinar, we explored essential aspects of Customer Journey Management and personalization. Here’s a summary of the key insights and topics discussed:
Key Takeaways:
Understanding the Customer Journey: Dr. Hill emphasized the importance of mapping and understanding the complete customer journey to identify touchpoints and opportunities for improvement.
Personalization Strategies: We discussed how to leverage data and insights to create personalized experiences that resonate with customers.
Technology Integration: Insights were shared on how inQuba’s advanced technology can streamline customer interactions and drive operational efficiency.
The document outlines an agenda for an activity where students will design their own water cycle and various water cycle activities. It also notes that designing their own water cycle is due on Friday and reminds students to bring a snack.
The document provides an agenda for a class that includes learning about the EPA Carbon Cycle from an online resource and notes there is no homework assigned. It also lists some items to take out such as a pen/pencil and offers the option to design a water cycle if finished with weekend homework.
The document lists items students should take out for school including a pen/pencil and assignment book. It also lists an agenda item for Earth Day 2010 on 4/22/2010 and mentions homework. Finally, it offers optional extra credit for students who bring a trashless lunch to class by Monday and specifies which periods should bring it to the teacher during homeroom.
This document provides an agenda for a class that includes watching an animation on the nitrogen cycle, completing a nitrogen cycle passport, diagramming the nitrogen cycle, and lists optional extra credit of bringing a trashless lunch on Monday.
This document provides an agenda for an ecology class that includes reviewing the carbon cycle from a previous worksheet, watching an animation on the nitrogen cycle, completing a nitrogen cycle passport activity, and viewing an online resource about ecology. There is no homework assigned.
The document provides an agenda for a class that includes learning about the nitrogen cycle by moving around the room and finishing a worksheet on plants, with optional extra credit for bringing a trashless lunch by Monday and turning it in during homeroom.
The document is an agenda for a class that includes finishing a reading assignment on symbiosis and answering questions, followed by watching two educational videos about unusual animal behaviors and parasites.
The document appears to be an agenda or schedule for a class that will discuss the water cycle on pages 30 of an assignment book, include designing their own water cycle, and reminds students to bring a snack for the class. The homework is listed as simple and the water cycle is described as clean and easy.
Parasitism describes a symbiotic relationship where one organism, the parasite, benefits while harming the other, the host. Common human parasites include ticks, tapeworms, and roundworms. Cuckoos are avian brood parasites that lay their eggs in the nests of other bird species like reed warblers. The cuckoo chick then evicts the host's eggs and chicks from the nest to monopolize all food from the host parents.
Predators like lions have adaptations for hunting like speed, claws and sharp teeth. Prey animals have camouflage and mimicry to avoid detection from predators. This document discusses the adaptations predators and prey have developed to hunt or avoid being hunted in the wild.
Symbiosis and Cuckoo article discusses symbiotic relationships and cuckoo birds. It encourages readers to annotate what they already know, important information, points of confusion, and anything that contradicts previous knowledge while reading the article. The annotations help readers identify key points and better understand the content.
Mr. Dennis' classes are scheduled to meet in the library today. A note indicates that all of Mr. Dennis' classes will be held in the library on March 31, 2010 rather than their usual classrooms. The brief message effectively communicates to students where to find their classes for that date.
The document appears to be a graph showing population numbers over time. It has two unlabeled axes that are likely time on the x-axis and population in thousands on the y-axis. The graph shows a curve indicating that the population increased steadily over the period of time represented.
The document is a student's agenda for an upcoming class. It lists supplies needed including a pen or pencil and a specific textbook page. The agenda notes the class will continue a discussion on animal relationships and provides the date.
The document discusses a district performance assessment scheduled for Friday. It will include a review of the district performance assessment. No other details are provided about the content or format of the assessment or review.
The document discusses a district performance assessment review scheduled for Friday March 24th, 2010. It will include a review of the district performance assessment. Students are reminded that the district performance assessment is this Friday.
The document discusses energy pyramids and food pyramids. An energy pyramid shows that there is less available energy the higher up in the food chain you go, as organisms use energy. A food pyramid recommends eating more of the foods at the bottom of the pyramid than the top, as those foods provide more "good energy." The document asks if it would be healthy to eat according to an inverted food pyramid or for an ecosystem to have an inverted energy pyramid.
This document defines and provides examples of different types of animal relationships: competition occurs when animals try to use the same resources, predator/prey relationships involve one animal eating another, symbiosis describes long-term interactions that benefit both species, and coevolution is long-term changes in species due to their close relationship.
The document discusses a district performance assessment scheduled for Friday. It lists an agenda to finish a project called WILD CATS and review for the district performance assessment happening on March 23, 2010.
Lee Barnes - Path to Becoming an Effective Test Automation Engineer.pdfleebarnesutopia
So… you want to become a Test Automation Engineer (or hire and develop one)? While there’s quite a bit of information available about important technical and tool skills to master, there’s not enough discussion around the path to becoming an effective Test Automation Engineer that knows how to add VALUE. In my experience this had led to a proliferation of engineers who are proficient with tools and building frameworks but have skill and knowledge gaps, especially in software testing, that reduce the value they deliver with test automation.
In this talk, Lee will share his lessons learned from over 30 years of working with, and mentoring, hundreds of Test Automation Engineers. Whether you’re looking to get started in test automation or just want to improve your trade, this talk will give you a solid foundation and roadmap for ensuring your test automation efforts continuously add value. This talk is equally valuable for both aspiring Test Automation Engineers and those managing them! All attendees will take away a set of key foundational knowledge and a high-level learning path for leveling up test automation skills and ensuring they add value to their organizations.
inQuba Webinar Mastering Customer Journey Management with Dr Graham HillLizaNolte
HERE IS YOUR WEBINAR CONTENT! 'Mastering Customer Journey Management with Dr. Graham Hill'. We hope you find the webinar recording both insightful and enjoyable.
In this webinar, we explored essential aspects of Customer Journey Management and personalization. Here’s a summary of the key insights and topics discussed:
Key Takeaways:
Understanding the Customer Journey: Dr. Hill emphasized the importance of mapping and understanding the complete customer journey to identify touchpoints and opportunities for improvement.
Personalization Strategies: We discussed how to leverage data and insights to create personalized experiences that resonate with customers.
Technology Integration: Insights were shared on how inQuba’s advanced technology can streamline customer interactions and drive operational efficiency.
"$10 thousand per minute of downtime: architecture, queues, streaming and fin...Fwdays
Direct losses from downtime in 1 minute = $5-$10 thousand dollars. Reputation is priceless.
As part of the talk, we will consider the architectural strategies necessary for the development of highly loaded fintech solutions. We will focus on using queues and streaming to efficiently work and manage large amounts of data in real-time and to minimize latency.
We will focus special attention on the architectural patterns used in the design of the fintech system, microservices and event-driven architecture, which ensure scalability, fault tolerance, and consistency of the entire system.
AI in the Workplace Reskilling, Upskilling, and Future Work.pptxSunil Jagani
Discover how AI is transforming the workplace and learn strategies for reskilling and upskilling employees to stay ahead. This comprehensive guide covers the impact of AI on jobs, essential skills for the future, and successful case studies from industry leaders. Embrace AI-driven changes, foster continuous learning, and build a future-ready workforce.
Read More - https://bit.ly/3VKly70
What is an RPA CoE? Session 1 – CoE VisionDianaGray10
In the first session, we will review the organization's vision and how this has an impact on the COE Structure.
Topics covered:
• The role of a steering committee
• How do the organization’s priorities determine CoE Structure?
Speaker:
Chris Bolin, Senior Intelligent Automation Architect Anika Systems
Discover the Unseen: Tailored Recommendation of Unwatched ContentScyllaDB
The session shares how JioCinema approaches ""watch discounting."" This capability ensures that if a user watched a certain amount of a show/movie, the platform no longer recommends that particular content to the user. Flawless operation of this feature promotes the discover of new content, improving the overall user experience.
JioCinema is an Indian over-the-top media streaming service owned by Viacom18.
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.
Keywords: AI, Containeres, Kubernetes, Cloud Native
Event Link: https://meine.doag.org/events/cloudland/2024/agenda/#agendaId.4211
The Microsoft 365 Migration Tutorial For Beginner.pptxoperationspcvita
This presentation will help you understand the power of Microsoft 365. However, we have mentioned every productivity app included in Office 365. Additionally, we have suggested the migration situation related to Office 365 and how we can help you.
You can also read: https://www.systoolsgroup.com/updates/office-365-tenant-to-tenant-migration-step-by-step-complete-guide/
LF Energy Webinar: Carbon Data Specifications: Mechanisms to Improve Data Acc...DanBrown980551
This LF Energy webinar took place June 20, 2024. It featured:
-Alex Thornton, LF Energy
-Hallie Cramer, Google
-Daniel Roesler, UtilityAPI
-Henry Richardson, WattTime
In response to the urgency and scale required to effectively address climate change, open source solutions offer significant potential for driving innovation and progress. Currently, there is a growing demand for standardization and interoperability in energy data and modeling. Open source standards and specifications within the energy sector can also alleviate challenges associated with data fragmentation, transparency, and accessibility. At the same time, it is crucial to consider privacy and security concerns throughout the development of open source platforms.
This webinar will delve into the motivations behind establishing LF Energy’s Carbon Data Specification Consortium. It will provide an overview of the draft specifications and the ongoing progress made by the respective working groups.
Three primary specifications will be discussed:
-Discovery and client registration, emphasizing transparent processes and secure and private access
-Customer data, centering around customer tariffs, bills, energy usage, and full consumption disclosure
-Power systems data, focusing on grid data, inclusive of transmission and distribution networks, generation, intergrid power flows, and market settlement data
AppSec PNW: Android and iOS Application Security with MobSFAjin Abraham
Mobile Security Framework - MobSF is a free and open source automated mobile application security testing environment designed to help security engineers, researchers, developers, and penetration testers to identify security vulnerabilities, malicious behaviours and privacy concerns in mobile applications using static and dynamic analysis. It supports all the popular mobile application binaries and source code formats built for Android and iOS devices. In addition to automated security assessment, it also offers an interactive testing environment to build and execute scenario based test/fuzz cases against the application.
This talk covers:
Using MobSF for static analysis of mobile applications.
Interactive dynamic security assessment of Android and iOS applications.
Solving Mobile app CTF challenges.
Reverse engineering and runtime analysis of Mobile malware.
How to shift left and integrate MobSF/mobsfscan SAST and DAST in your build pipeline.
Session 1 - Intro to Robotic Process Automation.pdfUiPathCommunity
👉 Check out our full 'Africa Series - Automation Student Developers (EN)' page to register for the full program:
https://bit.ly/Automation_Student_Kickstart
In this session, we shall introduce you to the world of automation, the UiPath Platform, and guide you on how to install and setup UiPath Studio on your Windows PC.
📕 Detailed agenda:
What is RPA? Benefits of RPA?
RPA Applications
The UiPath End-to-End Automation Platform
UiPath Studio CE Installation and Setup
💻 Extra training through UiPath Academy:
Introduction to Automation
UiPath Business Automation Platform
Explore automation development with UiPath Studio
👉 Register here for our upcoming Session 2 on June 20: Introduction to UiPath Studio Fundamentals: https://community.uipath.com/events/details/uipath-lagos-presents-session-2-introduction-to-uipath-studio-fundamentals/
In the realm of cybersecurity, offensive security practices act as a critical shield. By simulating real-world attacks in a controlled environment, these techniques expose vulnerabilities before malicious actors can exploit them. This proactive approach allows manufacturers to identify and fix weaknesses, significantly enhancing system security.
This presentation delves into the development of a system designed to mimic Galileo's Open Service signal using software-defined radio (SDR) technology. We'll begin with a foundational overview of both Global Navigation Satellite Systems (GNSS) and the intricacies of digital signal processing.
The presentation culminates in a live demonstration. We'll showcase the manipulation of Galileo's Open Service pilot signal, simulating an attack on various software and hardware systems. This practical demonstration serves to highlight the potential consequences of unaddressed vulnerabilities, emphasizing the importance of offensive security practices in safeguarding critical infrastructure.
Introducing BoxLang : A new JVM language for productivity and modularity!Ortus Solutions, Corp
Just like life, our code must adapt to the ever changing world we live in. From one day coding for the web, to the next for our tablets or APIs or for running serverless applications. Multi-runtime development is the future of coding, the future is to be dynamic. Let us introduce you to BoxLang.
Dynamic. Modular. Productive.
BoxLang redefines development with its dynamic nature, empowering developers to craft expressive and functional code effortlessly. Its modular architecture prioritizes flexibility, allowing for seamless integration into existing ecosystems.
Interoperability at its Core
With 100% interoperability with Java, BoxLang seamlessly bridges the gap between traditional and modern development paradigms, unlocking new possibilities for innovation and collaboration.
Multi-Runtime
From the tiny 2m operating system binary to running on our pure Java web server, CommandBox, Jakarta EE, AWS Lambda, Microsoft Functions, Web Assembly, Android and more. BoxLang has been designed to enhance and adapt according to it's runnable runtime.
The Fusion of Modernity and Tradition
Experience the fusion of modern features inspired by CFML, Node, Ruby, Kotlin, Java, and Clojure, combined with the familiarity of Java bytecode compilation, making BoxLang a language of choice for forward-thinking developers.
Empowering Transition with Transpiler Support
Transitioning from CFML to BoxLang is seamless with our JIT transpiler, facilitating smooth migration and preserving existing code investments.
Unlocking Creativity with IDE Tools
Unleash your creativity with powerful IDE tools tailored for BoxLang, providing an intuitive development experience and streamlining your workflow. Join us as we embark on a journey to redefine JVM development. Welcome to the era of BoxLang.
"Frontline Battles with DDoS: Best practices and Lessons Learned", Igor IvaniukFwdays
At this talk we will discuss DDoS protection tools and best practices, discuss network architectures and what AWS has to offer. Also, we will look into one of the largest DDoS attacks on Ukrainian infrastructure that happened in February 2022. We'll see, what techniques helped to keep the web resources available for Ukrainians and how AWS improved DDoS protection for all customers based on Ukraine experience
What is an RPA CoE? Session 2 – CoE RolesDianaGray10
In this session, we will review the players involved in the CoE and how each role impacts opportunities.
Topics covered:
• What roles are essential?
• What place in the automation journey does each role play?
Speaker:
Chris Bolin, Senior Intelligent Automation Architect Anika Systems
"What does it really mean for your system to be available, or how to define w...Fwdays
We will talk about system monitoring from a few different angles. We will start by covering the basics, then discuss SLOs, how to define them, and why understanding the business well is crucial for success in this exercise.
Dandelion Hashtable: beyond billion requests per second on a commodity serverAntonios Katsarakis
This slide deck presents DLHT, a concurrent in-memory hashtable. Despite efforts to optimize hashtables, that go as far as sacrificing core functionality, state-of-the-art designs still incur multiple memory accesses per request and block request processing in three cases. First, most hashtables block while waiting for data to be retrieved from memory. Second, open-addressing designs, which represent the current state-of-the-art, either cannot free index slots on deletes or must block all requests to do so. Third, index resizes block every request until all objects are copied to the new index. Defying folklore wisdom, DLHT forgoes open-addressing and adopts a fully-featured and memory-aware closed-addressing design based on bounded cache-line-chaining. This design offers lock-free index operations and deletes that free slots instantly, (2) completes most requests with a single memory access, (3) utilizes software prefetching to hide memory latencies, and (4) employs a novel non-blocking and parallel resizing. In a commodity server and a memory-resident workload, DLHT surpasses 1.6B requests per second and provides 3.5x (12x) the throughput of the state-of-the-art closed-addressing (open-addressing) resizable hashtable on Gets (Deletes).