This document compares the caching technologies Memcached and Redis. It provides an overview of how caching works and the problems that can occur with caching like cache misses, stale data, and warm-up times. It details the features of Memcached and Redis, including their data structures and operations. Benchmarks are presented comparing the performance of Memcached and Redis for set and get operations with varying numbers of servers and clients. Redis performance degrades under heavy load due to its single-threaded architecture while Memcached scales better. The document concludes more benchmarks are needed to fully evaluate Redis.
Background Tasks in Node - Evan Tahler, TaskRabbitRedis Labs
The talk gives an overview of some of the many ways you can preform
background taks in node, which include: Foreground (in-line) Parallel (threaded-ish) Local Messages (fork-ish) Remote
Messages Remote Queues (Resque-ish) Event Bus (Kafka-ish) For every section, we show an example, and more interestingly,
note how node makes every step better/faster/stronger... even the bad ideas! The idea for the talk came from a twitter
converstaion with @dshaw, host of NodeUP about how easy it was to have multiple node workers in Node-Resque... Check
out the presentation to learn how!
Introduction to memcached, a caching service designed for optimizing performance and scaling in the web stack, seen from perspective of MySQL/PHP users. Given for 2nd year students of professional bachelor in ICT at Kaho St. Lieven, Gent.
Postgres & Redis Sitting in a Tree- Rimas Silkaitis, HerokuRedis Labs
Postgres and Redis Sitting in a Tree | In today’s world of polyglot persistence, it’s likely that companies will be using multiple data stores for storing and working with data based on the use case. Typically a company will
start with a relational database like Postgres and then add Redis for more high velocity use-cases. What if you could tie the two systems together to enable so much more?
Redis Introduction and customized framework base on StackExchange.Redis but update to using singleton pattern and JSON
Configuration Mapping with Redis Instance Group and Name concept.
Redis is a NoSQL technology that rides a fine line between database and in-memory cache. Redis also offers "remote data structures", which gives it a significant advantage over other in-memory databases. This session will cover several PHP clients for Redis, and how to use them for caching, data modeling and generally improving application throughput.
Background Tasks in Node - Evan Tahler, TaskRabbitRedis Labs
The talk gives an overview of some of the many ways you can preform
background taks in node, which include: Foreground (in-line) Parallel (threaded-ish) Local Messages (fork-ish) Remote
Messages Remote Queues (Resque-ish) Event Bus (Kafka-ish) For every section, we show an example, and more interestingly,
note how node makes every step better/faster/stronger... even the bad ideas! The idea for the talk came from a twitter
converstaion with @dshaw, host of NodeUP about how easy it was to have multiple node workers in Node-Resque... Check
out the presentation to learn how!
Introduction to memcached, a caching service designed for optimizing performance and scaling in the web stack, seen from perspective of MySQL/PHP users. Given for 2nd year students of professional bachelor in ICT at Kaho St. Lieven, Gent.
Postgres & Redis Sitting in a Tree- Rimas Silkaitis, HerokuRedis Labs
Postgres and Redis Sitting in a Tree | In today’s world of polyglot persistence, it’s likely that companies will be using multiple data stores for storing and working with data based on the use case. Typically a company will
start with a relational database like Postgres and then add Redis for more high velocity use-cases. What if you could tie the two systems together to enable so much more?
Redis Introduction and customized framework base on StackExchange.Redis but update to using singleton pattern and JSON
Configuration Mapping with Redis Instance Group and Name concept.
Redis is a NoSQL technology that rides a fine line between database and in-memory cache. Redis also offers "remote data structures", which gives it a significant advantage over other in-memory databases. This session will cover several PHP clients for Redis, and how to use them for caching, data modeling and generally improving application throughput.
Implementing High Availability Caching with MemcachedGear6
Typical Memcached deployments do not comprehensively address web site requirements for high availability. Depending on your web architecture, a single failure can disable your web caches. This presentation offers real world solutions to solving <a>high availability</a> challenges common to large, dynamic websites with Memcached, specifically:
* Options and benefits for deploying high availability services within Memcached
* How companies are approaching high availability
* Considerations on building and deploying high availability
o Recommendations for a typical Memcached environment
o Open source tools available
o High level costs for deployment
- Understanding Time Series
- What's the Fundamental Problem
- Prometheus Solution (v1.x)
- New Design of Prometheus (v2.x)
- Data Compression Algorithm
Building better Node.js applications on MariaDBMariaDB plc
In this session, Diego Dupin teaches tips and tricks for using the new Node.js connector for MariaDB. Recent driver updates include exciting new features such as a promise-based API, pipelining and insert streaming. Targeted at beginner to intermediate Node.js developers, this session includes basics for getting started with Node.js before focusing on best practices and more advanced topics. The session finishes with an overview of integration with well-known Node.js frameworks, including the popular objection/relational mapping (ORM) frameworks.
The Google Chubby lock service for loosely-coupled distributed systemsRomain Jacotin
The Google Chubby lock service presented in 2006 is the inspiration for Apache ZooKeeper: let's take a deep dive into Chubby to better understand ZooKeeper and distributed consensus.
Using advanced options in MariaDB Connector/JMariaDB plc
MariaDB Connector/J is our widely used Type 4 JDBC driver for Java. This session covers the basics of getting started with Java and MariaDB, and moves quickly to more advanced topics, including connection pooling, automatic failover and debugging. Diego Dupin also includes an overview of popular object/relational mapping (ORM) and programming frameworks for Java. Even if you have been using the MariaDB Connector/J for years, come to this session to learn about the latest release, see where the connector is going and discover the latest tips and tricks.
Hadoop has proven to be an invaluable tool for many companies over the past few years. Yet it has it's ways and knowing them up front can safe valuable time. This session is a run down of the ever recurring lessons learned from running various Hadoop clusters in production since version 0.15.
What to expect from Hadoop - and what not? How to integrate Hadoop into existing infrastructure? Which data formats to use? What compression? Small files vs big files? Append or not? Essential configuration and operations tips. What about querying all the data? The project, the community and pointers to interesting projects that complement the Hadoop experience.
At Salesforce, we have deployed many thousands of HBase/HDFS servers, and learned a lot about tuning during this process. This talk will walk you through the many relevant HBase, HDFS, Apache ZooKeeper, Java/GC, and Operating System configuration options and provides guidelines about which options to use in what situation, and how they relate to each other.
Implementing High Availability Caching with MemcachedGear6
Typical Memcached deployments do not comprehensively address web site requirements for high availability. Depending on your web architecture, a single failure can disable your web caches. This presentation offers real world solutions to solving <a>high availability</a> challenges common to large, dynamic websites with Memcached, specifically:
* Options and benefits for deploying high availability services within Memcached
* How companies are approaching high availability
* Considerations on building and deploying high availability
o Recommendations for a typical Memcached environment
o Open source tools available
o High level costs for deployment
- Understanding Time Series
- What's the Fundamental Problem
- Prometheus Solution (v1.x)
- New Design of Prometheus (v2.x)
- Data Compression Algorithm
Building better Node.js applications on MariaDBMariaDB plc
In this session, Diego Dupin teaches tips and tricks for using the new Node.js connector for MariaDB. Recent driver updates include exciting new features such as a promise-based API, pipelining and insert streaming. Targeted at beginner to intermediate Node.js developers, this session includes basics for getting started with Node.js before focusing on best practices and more advanced topics. The session finishes with an overview of integration with well-known Node.js frameworks, including the popular objection/relational mapping (ORM) frameworks.
The Google Chubby lock service for loosely-coupled distributed systemsRomain Jacotin
The Google Chubby lock service presented in 2006 is the inspiration for Apache ZooKeeper: let's take a deep dive into Chubby to better understand ZooKeeper and distributed consensus.
Using advanced options in MariaDB Connector/JMariaDB plc
MariaDB Connector/J is our widely used Type 4 JDBC driver for Java. This session covers the basics of getting started with Java and MariaDB, and moves quickly to more advanced topics, including connection pooling, automatic failover and debugging. Diego Dupin also includes an overview of popular object/relational mapping (ORM) and programming frameworks for Java. Even if you have been using the MariaDB Connector/J for years, come to this session to learn about the latest release, see where the connector is going and discover the latest tips and tricks.
Hadoop has proven to be an invaluable tool for many companies over the past few years. Yet it has it's ways and knowing them up front can safe valuable time. This session is a run down of the ever recurring lessons learned from running various Hadoop clusters in production since version 0.15.
What to expect from Hadoop - and what not? How to integrate Hadoop into existing infrastructure? Which data formats to use? What compression? Small files vs big files? Append or not? Essential configuration and operations tips. What about querying all the data? The project, the community and pointers to interesting projects that complement the Hadoop experience.
At Salesforce, we have deployed many thousands of HBase/HDFS servers, and learned a lot about tuning during this process. This talk will walk you through the many relevant HBase, HDFS, Apache ZooKeeper, Java/GC, and Operating System configuration options and provides guidelines about which options to use in what situation, and how they relate to each other.
What's new with enterprise Redis - Leena Joshi, Redis LabsRedis Labs
Redis Labs manages over 160k+ HA databases, 10k clustered databases, without data loss in spite of one node failure a day and one data center outage per month. Using Enterprise
Redis(RLEC), Redis Labs delivers seamless zero downtime scaling, true high availability with persistence, cross-rack/zone/
datacenter replication and instant automatic failover. Learn how. Join this session for a deep dive into how enterprise Redis makes for no-hassle Redis deployments and the roadmap for new Redis capabilities. Discover new cost savings with Redis on Flash for cost-effective high performance operations and analytics
In KDD2011, Vijay Narayanan (Yahoo!) and Milind Bhandarkar (Greenplum Labs, EMC) conducted a tutorial on "Modeling with Hadoop". This is the first half of the tutorial.
Technical overview of three of the most representative KeyValue Stores: Cassandra, Redis and CouchDB. Focused on Ruby and Ruby on Rails developement, this talk shows how to solve common problems, the most popular libraries, benchmarking and the best use case for each one of them.
This talk was part of the Conferencia Rails 2009, Madrid, Spain.
http://app.conferenciarails.org/talks/43-key-value-stores-conviertete-en-un-jedi-master
10 Ways to Scale with Redis - LA Redis Meetup 2019Dave Nielsen
Redis has 10 different data structures (String, Hash, List, Set, Sorted Set, Bit Array, Bit Field, Hyperloglog, Geospatial Index, Streams) plus Pub/Sub and many Redis Modules. In this talk, Dave will give 10 examples of how to use these data structures to scale your website. I will start with the basics, such as a cache and User session management. Then I demonstrate user generated tags, leaderboards and counting things with hyberloglog. I will with a demo of Redis Pub/Sub vs Redis Streams which can be used to scale your Microservices-based architecture.
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.
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.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
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
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.
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/
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
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
Encryption in Microsoft 365 - ExpertsLive Netherlands 2024Albert Hoitingh
In this session I delve into the encryption technology used in Microsoft 365 and Microsoft Purview. Including the concepts of Customer Key and Double Key Encryption.
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!
2. Databases
WE LOVE THEM
...
Except when we don’t
2
3. When Databases Rule
• Many access patterns on the same set of
data
• Transactions (both monetary and isolated
units of work)
• Don’t know what the end state access
patterns will be
• Always :)
3
4. When Databases Suck
• Lots of concurrent users
• ORMs
• Big Data Sets
• Small Pockets of VERY hot data
4
5. How Caching Works
• External vs. built-in caching
• MySQL Query Cache
• InnoDB Buffer Pool
• Rails SOMETHING
5
14. Stale Data
• Must maintain consistency between the
database and the cache from within the
application
• Extremely difficult to validate correctness
14
15. Cache Warm-Up
• All attempts to read from the cache are
CACHE MISSES, which require three
operations.
• This can result in a significant degradation
of response time.
• Usually accompanied by a Thundering Herd
15
16. Use Cases
• Sessions • Tag Clouds
• Popular Items • Auto-suggest lists
• Full Page Cache • Relationships
• Profile • User Information
Information
• Online Users
• User Preferences • Statistics
16
17. Memcached
Memcached is an in-memory key-
value store for small chunks of
arbitrary data (strings, objects) from
results of database calls, API calls,
or page rendering.
17
18. Redis
Redis is an open source, advanced
key-value store. It is often referred
to as a “data structure server” since
keys can contain strings, hashes,
lists, sets and sorted sets.
18
20. Consistent Hashing
• Each Key deterministically goes to a
particular server. Think (KEY % SERVERS)
20
21. Memcached
• Dead Simple & Battle Tested
• Fast
• Non-Blocking get()/set()
• Multi-Threaded
• Consistent Hashing
21
22. Memcached Example
employee_id = 1234
employee_json = {
name => ‘Ryan Lowe’,
title => ‘Production Engineer’ }
set(employee_id, employee_json)
get(employee_id) [Returns employee_json]
22
23. But I don’t want all the
data
• What if I just want the name?
• 64 Bytes for the object vs. 10 for just the
name :-(
• 6x network traffic
• More work for the application
• Fatter applications
23
24. Redis
• Advanced Data Types
• Replication
• Persistence
• Usually Fast
• Very Cool Atomic Operations
24
25. Redis: The Bad
• Single-Threaded
• Limited client support for consistent
hashing
• Significant overhead for persistence (do be
discussed later)
• Not widely deployed (compared to
Memcached)
25
34. Instrumentation
• Redis: info
• Memcached: stats
• Both give system information, connections,
hits, misses, etc.
• Graphite most of the metrics!!!
34
