OpenStack is an open source cloud computing platform that includes modules for compute (Nova), object storage (Swift), image service (Glance), identity (Keystone), and a dashboard web UI. It uses an open governance model with community-elected boards and technical leads. The projects are modular and pluggable, allowing them to scale horizontally. Upcoming features in the Diablo release include distributed scheduling, integration with Keystone authentication, and support for migration, volumes, and networking. OpenStack aims to be open in terms of source code, design, development, and community involvement.
These are the accompanying slides to a tech talk given at airbnb.
Video here: http://www.youtube.com/watch?v=GGzmST5nNSM
Other tech talks here: https://www.airbnb.com/tech_talks
These are the accompanying slides to a tech talk given at airbnb.
Video here: http://www.youtube.com/watch?v=GGzmST5nNSM
Other tech talks here: https://www.airbnb.com/tech_talks
Infrastructure-as-a-Service compute clouds provide a flexible hardware platform on which customers host applications as a set of appliances, e.g., web servers or databases. Each appliance is a VM image containing an OS kernel and userspace processes, within which applications access resources via traditional APIs such as POSIX. However, the flexibility provided by the hypervisor comes at a cost: the addition of another layer in the already complex software stack which impacts runtime performance, and increases the size of the trusted computing base.
Given that modern software is generally written in high-level languages that abstract the underlying OS, we revisit how these appliances are constructed with our Mirage operating system. Mirage supports the progressive specialisation of source code, and gradually replaces traditional OS components with customisable libraries, ultimately resulting in "unikernel" VMs: sealed, fixed-purpose VMs that run directly on the hypervisor.
Developers no longer need to become sysadmins, expert in the configuration of all manner of system components, to use cloud resources. At the same time, they can develop their code using their usual tools, only making the final push to the cloud once they are satisfied their code works. As they explicitly link in components that would normally be provided by the host OS, the resulting unikernels are also highly compact: facilities that are not used are simply not included in the resulting microkernel binary.
This talk will describe the architecture of Mirage, and show a quick demonstration of how to build a web-server that runs as a unikernel on a standard Xen installation.
International Journal of Computational Engineering Research(IJCER)ijceronline
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity
From the March 1, 2013, Economic Freedom of the World Index co-author, James Gwartney explains how he, Milton Friedman and other leading economists developed this index and how that measure is now widely used in scholarly research to address topics ranging from economic growth and development to the determinants of peaceful relations among nations.
Zen and-the-art-of-build-script-maintenance-skillsmatterSkills Matter
Build scripts are an essential art in any software project. And yet they are so often fragile, brittle and unportable things, hard to understand and harder to maintain. In this talk, we cover what constitutes a good build script, and look at a few of the essential rules in writing one.
John Smart, creator of the Java Power Tools Bootcamp, will look at general techniques that are applicable to any build scripting technology, as well as some technology-specific tips for Ant and Maven.
This slide set corresponds to the MaterialsConcepts YouTube video "Muddiest Point- Phase Diagrams II: Eutectic Microstructures". Here is the link:
http://www.youtube.com/watch?v=AbXIiN8iAeU
To study the vocab used in this video, visit this site:
http://quizlet.com/20699445/52-eutectic-pb-sn-phase-diagram-and-microstructures-flash-cards/
This work was supported by NSF Grants #0836041 and #1226325.
Infrastructure-as-a-Service compute clouds provide a flexible hardware platform on which customers host applications as a set of appliances, e.g., web servers or databases. Each appliance is a VM image containing an OS kernel and userspace processes, within which applications access resources via traditional APIs such as POSIX. However, the flexibility provided by the hypervisor comes at a cost: the addition of another layer in the already complex software stack which impacts runtime performance, and increases the size of the trusted computing base.
Given that modern software is generally written in high-level languages that abstract the underlying OS, we revisit how these appliances are constructed with our Mirage operating system. Mirage supports the progressive specialisation of source code, and gradually replaces traditional OS components with customisable libraries, ultimately resulting in "unikernel" VMs: sealed, fixed-purpose VMs that run directly on the hypervisor.
Developers no longer need to become sysadmins, expert in the configuration of all manner of system components, to use cloud resources. At the same time, they can develop their code using their usual tools, only making the final push to the cloud once they are satisfied their code works. As they explicitly link in components that would normally be provided by the host OS, the resulting unikernels are also highly compact: facilities that are not used are simply not included in the resulting microkernel binary.
This talk will describe the architecture of Mirage, and show a quick demonstration of how to build a web-server that runs as a unikernel on a standard Xen installation.
International Journal of Computational Engineering Research(IJCER)ijceronline
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity
From the March 1, 2013, Economic Freedom of the World Index co-author, James Gwartney explains how he, Milton Friedman and other leading economists developed this index and how that measure is now widely used in scholarly research to address topics ranging from economic growth and development to the determinants of peaceful relations among nations.
Zen and-the-art-of-build-script-maintenance-skillsmatterSkills Matter
Build scripts are an essential art in any software project. And yet they are so often fragile, brittle and unportable things, hard to understand and harder to maintain. In this talk, we cover what constitutes a good build script, and look at a few of the essential rules in writing one.
John Smart, creator of the Java Power Tools Bootcamp, will look at general techniques that are applicable to any build scripting technology, as well as some technology-specific tips for Ant and Maven.
This slide set corresponds to the MaterialsConcepts YouTube video "Muddiest Point- Phase Diagrams II: Eutectic Microstructures". Here is the link:
http://www.youtube.com/watch?v=AbXIiN8iAeU
To study the vocab used in this video, visit this site:
http://quizlet.com/20699445/52-eutectic-pb-sn-phase-diagram-and-microstructures-flash-cards/
This work was supported by NSF Grants #0836041 and #1226325.
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.
Le nuove frontiere dell'AI nell'RPA con UiPath Autopilot™UiPathCommunity
In questo evento online gratuito, organizzato dalla Community Italiana di UiPath, potrai esplorare le nuove funzionalità di Autopilot, il tool che integra l'Intelligenza Artificiale nei processi di sviluppo e utilizzo delle Automazioni.
📕 Vedremo insieme alcuni esempi dell'utilizzo di Autopilot in diversi tool della Suite UiPath:
Autopilot per Studio Web
Autopilot per Studio
Autopilot per Apps
Clipboard AI
GenAI applicata alla Document Understanding
👨🏫👨💻 Speakers:
Stefano Negro, UiPath MVPx3, RPA Tech Lead @ BSP Consultant
Flavio Martinelli, UiPath MVP 2023, Technical Account Manager @UiPath
Andrei Tasca, RPA Solutions Team Lead @NTT Data
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
Generative AI Deep Dive: Advancing from Proof of Concept to ProductionAggregage
Join Maher Hanafi, VP of Engineering at Betterworks, in this new session where he'll share a practical framework to transform Gen AI prototypes into impactful products! He'll delve into the complexities of data collection and management, model selection and optimization, and ensuring security, scalability, and responsible use.
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.
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.
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!
Welocme to ViralQR, your best QR code generator.ViralQR
Welcome to ViralQR, your best QR code generator available on the market!
At ViralQR, we design static and dynamic QR codes. Our mission is to make business operations easier and customer engagement more powerful through the use of QR technology. Be it a small-scale business or a huge enterprise, our easy-to-use platform provides multiple choices that can be tailored according to your company's branding and marketing strategies.
Our Vision
We are here to make the process of creating QR codes easy and smooth, thus enhancing customer interaction and making business more fluid. We very strongly believe in the ability of QR codes to change the world for businesses in their interaction with customers and are set on making that technology accessible and usable far and wide.
Our Achievements
Ever since its inception, we have successfully served many clients by offering QR codes in their marketing, service delivery, and collection of feedback across various industries. Our platform has been recognized for its ease of use and amazing features, which helped a business to make QR codes.
Our Services
At ViralQR, here is a comprehensive suite of services that caters to your very needs:
Static QR Codes: Create free static QR codes. These QR codes are able to store significant information such as URLs, vCards, plain text, emails and SMS, Wi-Fi credentials, and Bitcoin addresses.
Dynamic QR codes: These also have all the advanced features but are subscription-based. They can directly link to PDF files, images, micro-landing pages, social accounts, review forms, business pages, and applications. In addition, they can be branded with CTAs, frames, patterns, colors, and logos to enhance your branding.
Pricing and Packages
Additionally, there is a 14-day free offer to ViralQR, which is an exceptional opportunity for new users to take a feel of this platform. One can easily subscribe from there and experience the full dynamic of using QR codes. The subscription plans are not only meant for business; they are priced very flexibly so that literally every business could afford to benefit from our service.
Why choose us?
ViralQR will provide services for marketing, advertising, catering, retail, and the like. The QR codes can be posted on fliers, packaging, merchandise, and banners, as well as to substitute for cash and cards in a restaurant or coffee shop. With QR codes integrated into your business, improve customer engagement and streamline operations.
Comprehensive Analytics
Subscribers of ViralQR receive detailed analytics and tracking tools in light of having a view of the core values of QR code performance. Our analytics dashboard shows aggregate views and unique views, as well as detailed information about each impression, including time, device, browser, and estimated location by city and country.
So, thank you for choosing ViralQR; we have an offer of nothing but the best in terms of QR code services to meet business diversity!
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
9. Governance Project Policy Board (PPB)
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12. Development cycle
Design, blueprint creation
Design Summit, 3 days to discuss and brainstorm
PTLs define cycle targets
6 months
Feature milestones every 4 weeks
Last feature milestone, no more features allowed
Release branch is cut, next cycle starts
Final release
13. Journey of a feature
Write Code Pre-merge Postmerge Milestone Final
Design tests Release
code review tests Release
feature branch
trunk
14. OpenStack projects
Nova (compute)
Glance (image service)
Core Swift (storage)
Keystone (common authentication)
« Dashboard » (web UI)
Incubation
Quantum (virtual network service)
Related
15. Swift (OpenStack Object Storage)
Object storage
RESTful interface
Objects in containers in accounts
No object size limit
3+ replication factor in separate « zones »
Stable and deployed in production
16. Swift main components
Object server
Proxy server
Swift API Container server
Account server
17. Swift: scales horizontally
No central index, independent API servers
Object location is derived from its name
Uses commodity hardware
18. Coming up in Diablo...
Container synchronization across clusters
Integration with Keystone authentication
Node load balancing on HEAD/GET
« X-Newest: true » to get newest version
19. Glance (OpenStack Image service)
Disk images and associated metadata
Discover, register and retrieve
Multiple disk formats :
raw, VHD, vmdk, vdi, qcow2, aki, ari, ami
Multiple container formats :
ovf, bare, aki, ari, ami
20. Glance architecture
Swift
glance
CLI tool S3
glance-api
glance.client Glance API HTTP
Python library
Local FS
Images
... ...
Registry API
glance-registry ...
SQL
Metadata
21. Glance: is very pluggable
Swift
glance
CLI tool S3
glance-api
glance.client Glance API HTTP
Python library
Local FS
Images
... ...
Registry API
glance-registry ...
SQL
Metadata
22. Coming up in Diablo...
Limiting, paging, filtering, ordering results
Local filesystem LRU cache
Delayed deletion of images
Integration with Keystone authentication
Sharing images between tenants
Notification system
New ISO disk format
23. Nova (OpenStack Compute)
« VMs one API call away »
Highly-modular framework
Still quickly evolving
Already deployed in private clouds (NASA)
In alpha at Rackspace and HP public clouds
24. Nova components
Scheduler node
Compute node
API node
RabbitMQ
Network node
Network node
Volume node
Object server
Datastore
25. Nova: is highly modular
WSGI middleware
API node Network node
Flat, FlatDHCP, Vlan
EC2/OpenStack API
IPv4 / IPv6
Keystone/standalone auth
Pluggable
QEMU, KVM, UML, LXC
Scheduler node Compute node Xen and XenServer
Chance
Zone-aware
Hyper-V
VMware vSphere
AMQP
Local LVM volume groups
Volume node iSCSI
Sheepdog
Sqlite
HP/Lefthand SANs
Datastore MySQL
Postgres Object server
26. Coming up in Diablo...
Distributed scheduling across zones
Snapshot, clone and boot from volumes
Integration with Keystone authentication
OpenStack API 1.1
Configuration drive
KVM Pause/Suspend support
Instance migration
Notification system
Instance types and capabilities-based scheduling
Multiple NICs
KVM Block migration support
HA mode for FlatDHCP network model
Support for Virtual Storage Arrays
Global firewall rules
Support for multiple volume types
Quantum NaaS integration points
Floating IPs in OpenStack API
27. Keystone (OpenStack Identity)
Unified tenants / accounts for all services
Swift
Glance keystone-manage
Session API Keystone Admin API
Nova
API servers
...
SQL LDAP