Die Welt in der wir leben und damit auch die Art wie wir Software schreiben wird immer dynamischer. Wir agieren in immer ungewisseren Kontexten, die Welt ändert sich deutlich schneller und die Systeme werden immer komplexer – so komplex dass ein einzelner Mensch oder eine kleine Gruppe nicht mehr in der Lage ist das gesamte System in Gänze zu verstehen. Dadurch sind wir heutzutage immer mehr darauf angewiesen unsere Softwaresysteme skalierbar zu schreiben, sie schnell austauschbar zu halten, robust gegenüber Fehlern zu gestalten und mehrere Versionen simultan zu unterstützen. Die große Frage die sich uns allen dabei stellt, ist es wie wir dies bewerkstelligen können? EventSourcing und CQRS sind zwei Architekturmuster, die uns dabei unterstützen können. Wir beginnen mit einem Impulsvortrag und freuen uns dann auf spannende Diskussionen rund ums Thema.
Why And When Should We Consider Stream Processing In Our Solutions Teqnation ...Soroosh Khodami
Session Recording on Youtube
https://www.youtube.com/watch?v=uWPZQ_HMy10
- Session Description
Do you find yourself bombarded with buzzwords and overwhelmed by the rapid emergence of new technologies? "Stream Processing" is a tech buzzword that has been around for some time but is still unfamiliar to many. Join this session to discover its potential in software systems. I will share insights from Apache Flink, Apache Beam, Google Dataflow, and my experiences at Bol.com (the biggest e-commerce platform in the Netherlands) as we cover:
- Stream Processing overview: main concepts and features
- Apache Beam vs. Spring Boot comparison
- Key Considerations for Using Stream Processing
- Learning strategies to navigate this evolving landscape.
Portfolio alignement with business intentionsLuis Becerra
The document discusses aligning an IT portfolio with business intentions through governance. It describes a case study of a copper alloy company that wants to align its IT investments and initiatives with its business goals of growth, integration, market share and R&D. Over 50 IT requests were submitted totaling $8 million, but only $3 million is allocated for new projects. The presentation proposes evaluating and prioritizing the requests based on strategic dimensions to create an aligned IT portfolio that supports the company's business intentions.
Abilitics-Microsoft Days 11-Case Ctudy: Where SharePoint, Silverlight & BI me...Veselin Georgiev
This document outlines a solution that brings together SharePoint, Silverlight, and business intelligence (BI) technologies to enable sales pipeline management and project management automation. It describes how Excel data can be imported into SharePoint lists, a custom Silverlight application can be used for data management, and documents can be generated from templates. The solution architecture diagram shows how data from multiple sources is organized into multidimensional cubes for reporting in Excel, Excel Services and PerformancePoint Services.
Opportunities and Pitfalls of Event-Driven UtopiaC4Media
Video and slides synchronized, mp3 and slide download available at URL http://bit.ly/2B24UoY.
Bernd Rücker goes over the concepts, the advantages, and the pitfalls of event-driven utopia. He shares real-life stories or points to source code examples. Filmed at qconnewyork.com.
Bernd Rücker is co-founder and developer advocate at Camunda. Previously, he has helped automating highly scalable core workflows at global companies including T-Mobile, Lufthansa, Zalando. He is currently focused on new workflow automation paradigms that fit into modern architectures around distributed systems, microservices, domain-driven design, event-driven architecture and reactive systems.
So you’ve inherited a SharePoint environment and need it secure, ASAP. The talk explains how to do this in a methodical way, to address all the levels of SharePoint security. This is ideal for the SharePoint administrator who needs to address the server security realm and the security officer who needs to understand SharePoint security.
The webinar discussed automating the purchasing process using Abila MIP's integrated purchasing system. It covered why organizations should automate to reduce paper, expedite approvals, and provide integrated reporting. The webinar demonstrated the requisitions, purchase orders, and encumbrances modules that allow a paperless approval workflow and interface with accounting functions. It concluded with next steps organizations can take to learn more or implement additional document management or payment solutions that integrate with Abila MIP.
The document summarizes the accounts receivable process for Outeraction Inc., a video production company. Key details include:
1) Outeraction produces short video blogs for clients and bills based on hours spent filming. Invoices are sent electronically and payment is due within 30 days.
2) The process involves clients ordering videos, scripts being developed, videos being filmed, and billing information and accounts receivable being updated.
3) As part of their analysis, the students identified strengths like electronic billing, as well as weaknesses like relying on meetings at coffee shops. They recommended Outeraction lease office space to improve professionalism and attract more clients.
Why And When Should We Consider Stream Processing In Our Solutions Teqnation ...Soroosh Khodami
Session Recording on Youtube
https://www.youtube.com/watch?v=uWPZQ_HMy10
- Session Description
Do you find yourself bombarded with buzzwords and overwhelmed by the rapid emergence of new technologies? "Stream Processing" is a tech buzzword that has been around for some time but is still unfamiliar to many. Join this session to discover its potential in software systems. I will share insights from Apache Flink, Apache Beam, Google Dataflow, and my experiences at Bol.com (the biggest e-commerce platform in the Netherlands) as we cover:
- Stream Processing overview: main concepts and features
- Apache Beam vs. Spring Boot comparison
- Key Considerations for Using Stream Processing
- Learning strategies to navigate this evolving landscape.
Portfolio alignement with business intentionsLuis Becerra
The document discusses aligning an IT portfolio with business intentions through governance. It describes a case study of a copper alloy company that wants to align its IT investments and initiatives with its business goals of growth, integration, market share and R&D. Over 50 IT requests were submitted totaling $8 million, but only $3 million is allocated for new projects. The presentation proposes evaluating and prioritizing the requests based on strategic dimensions to create an aligned IT portfolio that supports the company's business intentions.
Abilitics-Microsoft Days 11-Case Ctudy: Where SharePoint, Silverlight & BI me...Veselin Georgiev
This document outlines a solution that brings together SharePoint, Silverlight, and business intelligence (BI) technologies to enable sales pipeline management and project management automation. It describes how Excel data can be imported into SharePoint lists, a custom Silverlight application can be used for data management, and documents can be generated from templates. The solution architecture diagram shows how data from multiple sources is organized into multidimensional cubes for reporting in Excel, Excel Services and PerformancePoint Services.
Opportunities and Pitfalls of Event-Driven UtopiaC4Media
Video and slides synchronized, mp3 and slide download available at URL http://bit.ly/2B24UoY.
Bernd Rücker goes over the concepts, the advantages, and the pitfalls of event-driven utopia. He shares real-life stories or points to source code examples. Filmed at qconnewyork.com.
Bernd Rücker is co-founder and developer advocate at Camunda. Previously, he has helped automating highly scalable core workflows at global companies including T-Mobile, Lufthansa, Zalando. He is currently focused on new workflow automation paradigms that fit into modern architectures around distributed systems, microservices, domain-driven design, event-driven architecture and reactive systems.
So you’ve inherited a SharePoint environment and need it secure, ASAP. The talk explains how to do this in a methodical way, to address all the levels of SharePoint security. This is ideal for the SharePoint administrator who needs to address the server security realm and the security officer who needs to understand SharePoint security.
The webinar discussed automating the purchasing process using Abila MIP's integrated purchasing system. It covered why organizations should automate to reduce paper, expedite approvals, and provide integrated reporting. The webinar demonstrated the requisitions, purchase orders, and encumbrances modules that allow a paperless approval workflow and interface with accounting functions. It concluded with next steps organizations can take to learn more or implement additional document management or payment solutions that integrate with Abila MIP.
The document summarizes the accounts receivable process for Outeraction Inc., a video production company. Key details include:
1) Outeraction produces short video blogs for clients and bills based on hours spent filming. Invoices are sent electronically and payment is due within 30 days.
2) The process involves clients ordering videos, scripts being developed, videos being filmed, and billing information and accounts receivable being updated.
3) As part of their analysis, the students identified strengths like electronic billing, as well as weaknesses like relying on meetings at coffee shops. They recommended Outeraction lease office space to improve professionalism and attract more clients.
This portfolio contains samples of SQL Server development skills from hands-on experience in the SETFOCUS Masters Program. It includes 3 projects: 1) Piggy Bank simulated banking processes using views, stored procedures and triggers. 2) Mini Adventure Works loaded CSV data into SQL Server using SSIS and built reports in SSRS. 3) BlockFlix designed a movie rental database with stored procedures and SSRS reports for checkout, inventory, and top renters.
Office 365 and share point online ramp up in 60 minutes for on-premises share...Nik Patel
The document provides information about a SharePoint Saturday event speaker including their contact details and areas of expertise. It then discusses several benefits of using SharePoint Online including cost savings from not having to manage on-premises infrastructure, quick ramp-up time without lengthy deployments, and allowing IT to focus on business productivity rather than infrastructure maintenance. The document also provides an overview of the Office 365 platform and its global infrastructure and availability. It discusses SharePoint Online plans, licensing, and storage calculations. Finally, it proposes some best practices for administrating a SharePoint Online tenant.
Building a real-time analytics solution has never been faster or more cost-efficient. Most organizations are trying to find a way to improve customer experience and respond to business events in real time. Importantly, to do this quickly and at a fraction of the price of traditional approaches. In this session we will look at how to use the AWS services to best meet your real-time analytics needs.
A brief history of Blinkist backend time. I gave this talk at the Adidas Developer conference in Erlangen. The Adidas developer community is awesome! Go check out their Github repositories for all the project they've contributed https://github.com/adidas
برنامج موارد بشرية شامل و متكامل عربي و انجليزيى متوافق مع قانون العمل السعود...ERP - Eye Bright
Construction Business
Project Manamgnet
Accounting and Finance
Assets Management
Analytic Accounting (Cost Center Accounting)
HR and Payroll
Sales Management and CRM
Warehouse Management
Purchase Management
Email and Social Networking
Dashboards & Reporting
==========
Localization of HR ( Arabic)
GOSI
Overtime
Sales Commission
Employee Bonus
Employee Expenses
Employee Loans
End of Service Benefits
Additional Employee Info
Hijra Calendar
This document provides instructions for configuring electronic bank statements in SAP ECC 6.0. It discusses creating a house bank, making global settings for electronic bank statements including creating account symbols and assigning accounts, defining posting rules, creating transaction types, and assigning external transaction codes to posting rules. The document also covers importing the electronic bank statement, viewing cleared documents, and checking the bank statement.
Overcoming the Top 7 Intercompany Accounting Challenges in SAP ERP FinancialsSAPinsider Events
View this session from Financials 2015 in Las Vegas. Coming to Europe! www.Financials2015.com
Overcoming the Top 7 Intercompany Accounting Challenges in SAP ERP Financials by David Cohen, EY
This session will outline and provide resolutions for the seven most common intercompany accounting challenges that companies face within the areas of sale of products, charge of services, AP/AR reconciliation, profit elimination, assets transactions, and month-end closings. By attending you will receive:
- Practical examples on the most effective ways to use standard functionality of SAP ERP, SAP BusinessObjects BI, and SAP HANA to alleviate these issues
- Examples of overcoming difficulties in implementing asset transactions across borders, such as purchase and leasing
- Alternatives to performing inter-company profit elimination
- Lessons for configuring and running your month-end close
What's New in Deltek Vision 7.1, Invoice Approvals, Overhead Allocation and 5...BCS ProSoft
These slides are from BCS Prosoft's 2013 third quarter Deltek Vision User Group Meetings held in San Antonio, Houston, Denver and Honolulu. To register for your local UGM please visit http://www.bcsprosoft.com/deltekugm
Get an overview, learn the fundamental components and see a demo of both the Power BI desktop and the web-based application. View the video recording and download this deck at: https://www.senturus.com/resources/getting-started-power-bi-essentials/.
Senturus, a business analytics consulting firm, has a resource library with hundreds of free live and recorded webinars, blog posts, demos and unbiased product reviews available on our website at: http://www.senturus.com/senturus-resources/.
D365UG London March 2019 - Auditing and Security in the Dynamics platformRamon Tebar
This presentation is about the Security and Auditing in Dynamics 365 Customer Engagement and the Power Platform. Would you like to know who has done what in your Dynamics deployment? Then you will probably find this useful.
These slides were part of an entertaining presentation that we delivered for a Dynamics User Group event in the London Business School. During the session, we explained, with real examples, how the Microsoft Dynamics auditing capabilities have improved considerably since the first version of Microsoft Dynamics CRM until today, where we can already integrate Dynamics 365 with the Office 365 Security and Compliance center.
ROI and Economic Value of Data VirtualizationDenodo
Watch full webinar here: https://bit.ly/3oaKSzu
Gartner has predicted that organizations using Data Virtualization will spend 40% less on data integration than those using traditional technologies. Denodo customers have experienced time-to-deliver improvements of up to 90% within their data provisioning processes and cost savings of 50% or more. Join us for this webinar to discover how Data Virtualization can help accelerate your time-to-value from data while reducing the costs at the same time. As Rod Tidwell (Cuba Gooding Jr.) said in the movie 'Jerry Maguire', "Show me the money!"
Register to attend and learn how Data Virtualization can:
- Accelerate the delivery of data to users
- Drive digital transformation initiatives
- Reduce project costs and timelines
- Quickly deliver value to your organization
Pineapple Productions is a company started by 6 individuals including Alice McCutcheon, Dean Kenny, Christina Conlon, Luke Bolger, Daniel Rooney, and Aideen Leacy. The company is developing a product called the Q-Note, an augmented touch screen tablet, and has created a company structure, registered intellectual property, partnered with technology companies, and developed a technology roadmap. A financial analysis shows projected sales, cash flow, profits, and funding requirements for the startup of the business.
Eugene Kilpatrick completed an intensive SQL Server training program to enhance his skills as a database administrator. This portfolio contains details of three projects from the program: a library database using stored procedures, a bank database using triggers, views and stored procedures, and a movie rental database with SSRS reports. The portfolio demonstrates his skills in database design, XML processing, and using SQL Server tools like SSMS and SSRS.
Webinar: Microsoft ignite 2020 Key TakeawaysWithum
This webinar provided key takeaways from Microsoft Ignite 2020, including major announcements for Microsoft Teams, SharePoint, security, and Azure. Key updates included new Teams features like breakout rooms and together mode; SharePoint Syntex for AI-powered content management; Project Cortex components; and expanded low-code capabilities in Teams through Project Oakdale. The webinar also discussed updates for security, compliance, identity management and Azure services. Attendees were invited to book follow up meetings with experts and subscribe to a weekly newsletter.
Assessing the Sales Margins in New business modelsJos Feyaerts
Some theoretical concepts
- What make accounting difficult: or the difference between cash and profit
- The accounting canvas, the roadmap of our Fin. Plan
- The estimation of your Margin: it’s all about the margin
- Some Metrics for defining and controlling Margin with focus on SAAS
- Wrap up on margin
New business models and the impact on working capital
- Typology of cash-models
- Impact from License model to SAAS model on Cash
- Impact of the SAAS on investments and cash
- Platformization in BtoB market is at least as important as in BtoC and P2P.
- Some general advises for Starters
The document discusses how robotic process automation (RPA) can automate tasks to make jobs easier. It provides examples of how an RPA bot could automatically generate a company's monthly newsletter by scraping content from multiple sources and formatting it. Another example describes how a bot could access timesheet information on Trello, check it for errors, and send it to payroll. The document argues that RPA can save significant time on repetitive tasks like processing delivery notes or updating large BIM models.
This document summarizes the key challenges and solutions related to building a real-time data analytics platform at Netflix. Some of the main challenges addressed include: not having monitoring metrics today, making sense of billions of events, not all logs being worth processing, enabling real-time ingestion, tedious JSON payloads, system monitoring and resilience, and managing dependencies. The solutions implemented involve building a cloud real-time query service using technologies like Druid, ElasticSearch, Kafka, and curator to enable real-time exploration, insights, and guided debugging of big data at Netflix.
Spiritsofts is the best Training Institutes for Workday Integration to expand your skills and knowledge. We Provides the best learning Environment. Obtain all the training by our expert professional which is having working experience from Top IT companies. The Training in is every thing we explained based on real time scenarios, it works which we do in companies.
Hbb 2852 gain insights into your business operations with bpm and kibanaAllen Chan
At IBM InterConnect 2017, we discussed the ability for IBM BPM to send business events into analytics + visualization framework such as Elasticsearch + Kibana.
Got SIEM? Now what? Getting SIEM Work For YouAnton Chuvakin
Got SIEM? Now what? Making SIEM work for you!
Dr Anton Chuvakin
SANS 2010
Security Information and Event Management (SIEM) as well as log management tools have become more common across large organizations in recent years. SIEM and log management have also been a topic of hot debates. In fact, you organization might have purchased these tools already. However, many who acquired SIEM tools have realized that they are not ready to use many of the advanced correlation features, despite promises that "they are easy to use." So, what should you do to achieve success with SIEM? What logs should you collect? Correlate? Review? How do you use log management as a step before SIEM? What process absolutely must be built before SIEM purchase becomes successful. Attend this session to learn from the experience of those who did not have the benefit of learning from other's mistakes. Also, learn a few tips on how to "operationalize" that SIEM purchase you've made.
The document discusses GraphQL and REST APIs. It begins by providing background on GraphQL, including its features like queries, mutations, and subscriptions. It then outlines some pros and cons of GraphQL compared to REST. Specifically, it notes that GraphQL provides a flexible query language for APIs but lacks support for content negotiation and caching that REST provides. The document then demonstrates building a sample GraphQL API for whisky data using .NET Core and the graphql-dotnet library. It shows how to define the schema and resolve queries using types. Finally, it discusses alternatives to GraphQL like REST with OData and notes some tradeoffs between the different approaches.
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This portfolio contains samples of SQL Server development skills from hands-on experience in the SETFOCUS Masters Program. It includes 3 projects: 1) Piggy Bank simulated banking processes using views, stored procedures and triggers. 2) Mini Adventure Works loaded CSV data into SQL Server using SSIS and built reports in SSRS. 3) BlockFlix designed a movie rental database with stored procedures and SSRS reports for checkout, inventory, and top renters.
Office 365 and share point online ramp up in 60 minutes for on-premises share...Nik Patel
The document provides information about a SharePoint Saturday event speaker including their contact details and areas of expertise. It then discusses several benefits of using SharePoint Online including cost savings from not having to manage on-premises infrastructure, quick ramp-up time without lengthy deployments, and allowing IT to focus on business productivity rather than infrastructure maintenance. The document also provides an overview of the Office 365 platform and its global infrastructure and availability. It discusses SharePoint Online plans, licensing, and storage calculations. Finally, it proposes some best practices for administrating a SharePoint Online tenant.
Building a real-time analytics solution has never been faster or more cost-efficient. Most organizations are trying to find a way to improve customer experience and respond to business events in real time. Importantly, to do this quickly and at a fraction of the price of traditional approaches. In this session we will look at how to use the AWS services to best meet your real-time analytics needs.
A brief history of Blinkist backend time. I gave this talk at the Adidas Developer conference in Erlangen. The Adidas developer community is awesome! Go check out their Github repositories for all the project they've contributed https://github.com/adidas
برنامج موارد بشرية شامل و متكامل عربي و انجليزيى متوافق مع قانون العمل السعود...ERP - Eye Bright
Construction Business
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Accounting and Finance
Assets Management
Analytic Accounting (Cost Center Accounting)
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Sales Management and CRM
Warehouse Management
Purchase Management
Email and Social Networking
Dashboards & Reporting
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GOSI
Overtime
Sales Commission
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Employee Expenses
Employee Loans
End of Service Benefits
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Hijra Calendar
This document provides instructions for configuring electronic bank statements in SAP ECC 6.0. It discusses creating a house bank, making global settings for electronic bank statements including creating account symbols and assigning accounts, defining posting rules, creating transaction types, and assigning external transaction codes to posting rules. The document also covers importing the electronic bank statement, viewing cleared documents, and checking the bank statement.
Overcoming the Top 7 Intercompany Accounting Challenges in SAP ERP FinancialsSAPinsider Events
View this session from Financials 2015 in Las Vegas. Coming to Europe! www.Financials2015.com
Overcoming the Top 7 Intercompany Accounting Challenges in SAP ERP Financials by David Cohen, EY
This session will outline and provide resolutions for the seven most common intercompany accounting challenges that companies face within the areas of sale of products, charge of services, AP/AR reconciliation, profit elimination, assets transactions, and month-end closings. By attending you will receive:
- Practical examples on the most effective ways to use standard functionality of SAP ERP, SAP BusinessObjects BI, and SAP HANA to alleviate these issues
- Examples of overcoming difficulties in implementing asset transactions across borders, such as purchase and leasing
- Alternatives to performing inter-company profit elimination
- Lessons for configuring and running your month-end close
What's New in Deltek Vision 7.1, Invoice Approvals, Overhead Allocation and 5...BCS ProSoft
These slides are from BCS Prosoft's 2013 third quarter Deltek Vision User Group Meetings held in San Antonio, Houston, Denver and Honolulu. To register for your local UGM please visit http://www.bcsprosoft.com/deltekugm
Get an overview, learn the fundamental components and see a demo of both the Power BI desktop and the web-based application. View the video recording and download this deck at: https://www.senturus.com/resources/getting-started-power-bi-essentials/.
Senturus, a business analytics consulting firm, has a resource library with hundreds of free live and recorded webinars, blog posts, demos and unbiased product reviews available on our website at: http://www.senturus.com/senturus-resources/.
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This presentation is about the Security and Auditing in Dynamics 365 Customer Engagement and the Power Platform. Would you like to know who has done what in your Dynamics deployment? Then you will probably find this useful.
These slides were part of an entertaining presentation that we delivered for a Dynamics User Group event in the London Business School. During the session, we explained, with real examples, how the Microsoft Dynamics auditing capabilities have improved considerably since the first version of Microsoft Dynamics CRM until today, where we can already integrate Dynamics 365 with the Office 365 Security and Compliance center.
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Watch full webinar here: https://bit.ly/3oaKSzu
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Register to attend and learn how Data Virtualization can:
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- Drive digital transformation initiatives
- Reduce project costs and timelines
- Quickly deliver value to your organization
Pineapple Productions is a company started by 6 individuals including Alice McCutcheon, Dean Kenny, Christina Conlon, Luke Bolger, Daniel Rooney, and Aideen Leacy. The company is developing a product called the Q-Note, an augmented touch screen tablet, and has created a company structure, registered intellectual property, partnered with technology companies, and developed a technology roadmap. A financial analysis shows projected sales, cash flow, profits, and funding requirements for the startup of the business.
Eugene Kilpatrick completed an intensive SQL Server training program to enhance his skills as a database administrator. This portfolio contains details of three projects from the program: a library database using stored procedures, a bank database using triggers, views and stored procedures, and a movie rental database with SSRS reports. The portfolio demonstrates his skills in database design, XML processing, and using SQL Server tools like SSMS and SSRS.
Webinar: Microsoft ignite 2020 Key TakeawaysWithum
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Some theoretical concepts
- What make accounting difficult: or the difference between cash and profit
- The accounting canvas, the roadmap of our Fin. Plan
- The estimation of your Margin: it’s all about the margin
- Some Metrics for defining and controlling Margin with focus on SAAS
- Wrap up on margin
New business models and the impact on working capital
- Typology of cash-models
- Impact from License model to SAAS model on Cash
- Impact of the SAAS on investments and cash
- Platformization in BtoB market is at least as important as in BtoC and P2P.
- Some general advises for Starters
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Spiritsofts is the best Training Institutes for Workday Integration to expand your skills and knowledge. We Provides the best learning Environment. Obtain all the training by our expert professional which is having working experience from Top IT companies. The Training in is every thing we explained based on real time scenarios, it works which we do in companies.
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Got SIEM? Now what? Making SIEM work for you!
Dr Anton Chuvakin
SANS 2010
Security Information and Event Management (SIEM) as well as log management tools have become more common across large organizations in recent years. SIEM and log management have also been a topic of hot debates. In fact, you organization might have purchased these tools already. However, many who acquired SIEM tools have realized that they are not ready to use many of the advanced correlation features, despite promises that "they are easy to use." So, what should you do to achieve success with SIEM? What logs should you collect? Correlate? Review? How do you use log management as a step before SIEM? What process absolutely must be built before SIEM purchase becomes successful. Attend this session to learn from the experience of those who did not have the benefit of learning from other's mistakes. Also, learn a few tips on how to "operationalize" that SIEM purchase you've made.
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2. Experiments
are not
feasible!
• Risk to change a running system is too high!
• Huge effort to host several alternatives!
• Experiments produce insights on which we can‘t react
fast enough!
• Our technology stack doesn‘t support your idea!
• Running experiments cost too much (e. g.
implementation, seperate logging, assign experiments
to users)!
• Experiments aren‘t mature and crash the whole system!
• We can support only one version of the API at once!
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft4
4. DevOps and
Experiments
- Optimal
combo?
DevOps Goals
• Achieve accelerated and more frequent deployment of
changes to Production
• Feedback from real users as early and frequently as
possible
Continuous Delivery
• Quick deployment of components
• Automatic rollback (triggered manually / automatic)
Microservices (Philosophy)
• Non-Deployment Monoliths
• Small components (3 months / small team)
• Technology independent
• Allows different versions at runtime
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft6
5. Microservice
+
Continuous
Delivery
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft7
https://www.nginx.com/blog/introduction-to-
microservices/
http://blog.crisp.se/2013/02/05/yassalsundman/continuous-delivery-vs-continuous-deployment
6. Bounded
Context
Allow
• easier change of requirements
Need
• parallel models -> needs synchronisation16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft8
https://www.martinfowler.com/bliki/BoundedContext.html
7. Event
Sourcing
and CQRS
help
Event Sourcing
• Creation and synchronisation of parallel models
• Resilience
• Change Log
CQRS
• Separate write side from read side
• Supports parallel models (e. g. allowing only one serivce to
write data, but other services to reuse them in a way they
need)
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft9
10. Active
Record
Example: Bank Account
Domain Model
ORM
Layer
RDBMS
Load
AccountBalance
Aggregate for Account 501
0.00
ID Account Owner Balance
… … …
501 Björn Senft 0.00
502 Simon Oberthür 300.00
AccountBalance
Aggregate for Account 502
0.00
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft12
11. Active
Record
Example: Bank Account
Domain Model
ORM
Layer
RDBMS
Load
AccountBalance
Aggregate for Account 501
0.00
ID Account Owner Balance
… … …
501 Björn Senft 0.00
502 Simon Oberthür 300.00
Query results
AccountBalance
Aggregate for Account 502
300.00
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft13
12. Active
Record
Example: Bank Account
Domain Model
ORM
Layer
RDBMS
AccountBalance
Aggregate for Account 501
0.00
ID Account Owner Balance
… … …
501 Björn Senft 0.00
502 Simon Oberthür 300.00
Command:
Transfer 100€ from
Simon Oberthür to Björn Senft
AccountBalance
Aggregate for Account 502
300.00
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft14
13. Active
Record
Example: Bank Account
Domain Model
ORM
Layer
RDBMS
AccountBalance
Aggregate for Account 501
0.00
ID Account Owner Balance
… … …
501 Björn Senft 0.00
502 Simon Oberthür 300.00
Command Handler
Command:
Transfer 100€ from
Simon Oberthür to Björn Senft
AccountBalance
Aggregate for Account 502
300.00
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft15
14. Active
Record
Example: Bank Account
Domain Model
ORM
Layer
RDBMS
AccountBalance
Aggregate for Account 501
100.00
ID Account Owner Balance
… … …
501 Björn Senft 0.00
502 Simon Oberthür 300.00
Command Handler
Command:
Transfer 100€ from
Simon Oberthür to Björn Senft
AccountBalance
Aggregate for Account 502
200.00
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft16
15. Active
Record
Example: Bank Account
Domain Model
ORM
Layer
RDBMS
Save
AccountBalance
Aggregate for Account 501
100.00
ID Account Owner Balance
… … …
501 Björn Senft 0.00
502 Simon Oberthür 300.00
Command Handler
Command:
Transfer 100€ from
Simon Oberthür to Björn Senft
AccountBalance
Aggregate for Account 502
200.00
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft17
16. Active
Record
Example: Bank Account
Domain Model
ORM
Layer
RDBMS
AccountBalance
Aggregate for Account 501
100.00
ID Account Owner Balance
… … …
501 Björn Senft 100.00
502 Simon Oberthür 200.00
Update statement
Command Handler
Command:
Transfer 100€ from
Simon Oberthür to Björn Senft
AccountBalance
Aggregate for Account 502
200.00
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft18
17. Active
Record
Example: Bank Account
Domain Model
ORM
Layer
RDBMS
AccountBalance
Aggregate for Account 501
2550.00
ID Account Owner Balance
… … …
501 Björn Senft 2550.00
502 Simon Oberthür -15,300.00
AccountBalance
Aggregate for Account 502
-15,300.00
Simon Björn
What
happened?
What
happened?
Disadvantage: No history of changes!
Here: No reasoning about transactions in the past
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft20
18. Object-
relational
impedance
mismatch
• 143 pages on mapping
objects to tables
• Recommends using ORM-
Tools only for CRUD-heavy
applications
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft22
20. Event
Sourcing
Example: Bank Account
Domain Model
AccountBalance
Aggregate for Account 501
0.00
AccountBalance
Aggregate for Account 502
0.00
Event Store
Debit100€
Credit200€
…
Credit50€
Debit500€
Events
belonging to
Account 501
Query
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft24
21. Event
Sourcing
Example: Bank Account
Domain Model
AccountBalance
Aggregate for Account 501
0.00
AccountBalance
Aggregate for Account 502
300.00
Event Store
Debit100€
Credit200€
…
Credit50€
Debit500€
Events
belonging to
Account 501
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft25
22. Event
Sourcing
Example: Bank Account
Domain Model
AccountBalance
Aggregate for Account 501
0.00
AccountBalance
Aggregate for Account 502
300.00
Command:
Transfer 100€ from
Simon Oberthür to Björn Senft
Event Store
Debit100€
Credit200€
…
Credit50€
Debit500€
Events
belonging to
Account 501
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft26
23. Event
Sourcing
Example: Bank Account
Domain Model
AccountBalance
Aggregate for Account 501
0.00
AccountBalance
Aggregate for Account 502
300.00
Command Handler
Command:
Transfer 100€ from
Simon Oberthür to Björn Senft
Event Store
Debit100€
Credit200€
…
Credit50€
Debit500€
Events
belonging to
Account 501
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft27
24. Event
Sourcing
Example: Bank Account
Domain Model
AccountBalance
Aggregate for Account 501
0.00
AccountBalance
Aggregate for Account 502
300.00
Command Handler
Command:
Transfer 100€ from
Simon Oberthür to Björn Senft
Event Store
Debit100€
Credit200€
…
Credit50€
Debit500€
Events
belonging to
Account 501
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft28
25. Event
Sourcing
Example: Bank Account
Domain Model
AccountBalance
Aggregate for Account 501
0.00
AccountBalance
Aggregate for Account 502
300.00
Command Handler
Command:
Event Store
Received100€from
Acc502
Debit100€
Credit200€
…
Credit50€
Debit500€
Events
belonging to
Account 501
Append Transfer 100€ from
Simon Oberthür to Björn Senft
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft29
26. Event
Sourcing
Example: Bank Account
Domain Model
AccountBalance
Aggregate for Account 501
100.00
AccountBalance
Aggregate for Account 502
200.00
Command Handler
Command:
Event Store
Received100€from
Acc502
Debit100€
Credit200€
…
Credit50€
Debit500€
Events
belonging to
Account 501
Query
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft30
27. Saving and
Restoring
Saving
• Create an event for every state
change of the object
• Persist this stream of events,
preserving event order
BankAccountCreated
Id: 501
Owner: Björn Senft
DepositPerformed
AccountId: 501
Amount: 20€
OwnerChanged
AccountId: 501
NewOwner: Simon Oberthür
WithdrawalPerformed
AccountId: 501
Amount: 10€16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft33
28. Saving and
Restoring
Saving Restoring
• Create an event for every state
change of the object
• Persist this stream of events,
preserving event order
• Subsequently apply the events
from the respective EventStream
to a "blank" object instance
BankAccountCreated
Id: 501
Owner: Björn Senft
DepositPerformed
AccountId: 501
Amount: 20€
OwnerChanged
AccountId: 501
NewOwner: Simon Oberthür
WithdrawalPerformed
AccountId: 501
Amount: 10€
BankAccount
Empty
apply to
BankAccount
Id: 501
Owner: Björn Senft
Balance: 0€
produces
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft34
29. Saving and
Restoring
Saving Restoring
• Create an event for every state
change of the object
• Persist this stream of events,
preserving event order
• Subsequently apply the events
from the respective EventStream
to a "blank" object instance
BankAccountCreated
Id: 501
Owner: Björn Senft
DepositPerformed
AccountId: 501
Amount: 20€
OwnerChanged
AccountId: 501
NewOwner: Simon Oberthür
WithdrawalPerformed
AccountId: 501
Amount: 10€
BankAccount
Id: 501
Owner: Björn Senft
Balance: 0€
BankAccount
Id: 501
Owner: Björn Senft
Balance: 20€
BankAccount
Empty
apply to
apply to
produces
produces
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft35
30. Saving and
Restoring
Saving Restoring
• Create an event for every state
change of the object
• Persist this stream of events,
preserving event order
• Subsequently apply the events
from the respective EventStream
to a "blank" object instance
BankAccountCreated
Id: 501
Owner: Björn Senft
DepositPerformed
AccountId: 501
Amount: 20€
OwnerChanged
AccountId: 501
NewOwner: Simon Oberthür
WithdrawalPerformed
AccountId: 501
Amount: 10€
BankAccount
Id: 501
Owner: Björn Senft
Balance: 0€
BankAccount
Id: 501
Owner: Björn Senft
Balance: 20€
BankAccount
Id: 501
Owner: Simon Oberthür
Balance: 20€
BankAccount
Empty
apply to
apply to
apply to
produces
produces
produces
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft36
31. Saving and
Restoring
Saving Restoring
• Create an event for every state
change of the object
• Persist this stream of events,
preserving event order
• Subsequently apply the events
from the respective EventStream
to a "blank" object instance
BankAccountCreated
Id: 501
Owner: Björn Senft
DepositPerformed
AccountId: 501
Amount: 20€
OwnerChanged
AccountId: 501
NewOwner: Simon Oberthür
WithdrawalPerformed
AccountId: 501
Amount: 10€
BankAccount
Id: 501
Owner: Björn Senft
Balance: 0€
BankAccount
Id: 501
Owner: Björn Senft
Balance: 20€
BankAccount
Id: 501
Owner: Simon Oberthür
Balance: 20€
BankAccount
Id: 501
Owner: Simon Oberthür
Balance: 10€
BankAccount
Empty
apply to
apply to
apply to
apply to
produces
produces
produces
produces
Deleting?
Retroactive Event! An event undoing something that happened in the past.
BankAccountClosed
reason
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft37
32. Pros and
Cons
General Advantages
• High Scalability
• Transparency as every change is recorded
• Deterministic error search
General Disadvantages
• High software development effort
• “Packaging up every change to an application as an
event is an interface style that not everyone is
comfortable with, and many find to be awkward” ?
• „Querying on a lot of events“
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft39
34. CQRS
Service
Interfaces
Read Side
Write Side
Event Store
Publishes Events after
they have been saved
Denormalized Read Store
Subscribes to Events
on the Write Side
Query
Append
events
Events
Query response
User views data
in the UI
User makes a
change in the UI
Command
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft41
35. Pros and
Cons
General Advantages
• High Scalability
• Optimal for SOA / Cloud Computing
• Read and Write access can scale indepently
• Split up development for teams
General Disadvantages
• High software development effort
• Needs a fitting infrastructure
• Transactions are challenging
• You can query before a command was executed
(Eventual Consistency)
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft42
38. ES + CQRS
for
experiments
Different versions at runtime
• Bounded contexts
• Parallel models
• Separation of read and write side
Logging
• ES stores every state change by default
• User interactions can directly be logged into ES
Microservices
• Lower complexity
• Easier change of requirements
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft45
39. Experiments
are not
feasible!
• Risk to change a running system is too high!
• Huge effort to host several alternatives!
• Experiments produce insights on which we can‘t react
fast enough!
• Our technology stack doesn‘t support your idea!
• Running experiments cost too much (e. g.
implementation, seperate logging, assign experiments
to users)!
• Experiments aren‘t mature and crash the whole system!
• We can support only one version of the API at once!
16.01.2018 Event Sourcing und CQRS für Experimentieren - Björn Senft46