A distributed transaction is a database transaction in which two or more network hosts are involved. Usually, hosts provide transactional resources, while the transaction manager is responsible for creating and managing a global transaction that encompasses all operations against such resources. Distributed transactions, as any other transactions, must have all four ACID (atomicity, consistency, isolation, durability) properties, where atomicity guarantees all-or-nothing outcomes for the unit of work (operations bundle). Open Group, a vendor consortium, proposed the X/Open Distributed Transaction Processing (DTP) Model (X/Open XA), which became a de facto standard for behavior of transaction model components. Databases are common transactional resources and, often, transactions span a couple of such databases. In this case, a distributed transaction can be seen as a database transaction that must be synchronized (or provide ACID properties) among multiple participating databases which are distributed among different physical locations. The isolation property (the I of ACID) poses a special challenge for multi database transactions, since the (global) serializability property could be violated, even if each database provides it (see also global serializability). In practice most commercial database systems use strong strict two phase locking (SS2PL) for concurrency control, which ensures global serializability, if all the participating databases employ it. (see also commitment ordering for multidatabases.) A common algorithm for ensuring correct completion of a distributed transaction is the two-phase commit (2PC). This algorithm is usually applied for updates able to commit in a short period of time, ranging from couple of milliseconds to couple of minutes. There are also long-lived distributed transactions, for example a transaction to book a trip, which consists of booking a flight, a rental car and a hotel. Since booking the flight might take up to a day to get a confirmation, two-phase commit is not applicable here, it will lock the resources for this long. In this case more sophisticated techniques that involve multiple undo levels are used. The way you can undo the hotel booking by calling a desk and cancelling the reservation, a system can be designed to undo certain operations (unless they are irreversibly finished). In practice, long-lived distributed transactions are implemented in systems based on Web Services. Usually these transactions utilize principles of compensating transactions, Optimism and Isolation Without Locking. X/Open standard does not cover long-lived DTP. Several technologies, including Enterprise Java Beans (EJBs) and Microsoft Transaction Server (MTS) fully support distributed transaction standards. (Wikipedia).
What are Dividend Swaps, commodity swaps, equity swaps?
In todays video we will learn about Dividend Swaps, Commodity Swaps and Equity Swaps. These classes are all based on the book Trading and Pricing Financial Derivatives, available on Amazon at this link. https://amzn.to/2WIoAL0 Check out our website http://www.onfinance.org/ Follow Patri
From playlist Swaps
What is a Put Spread? | Options Trading Strategies | Option Combinations
What is a Put Spread? - Options Trading Strategies These classes are all based on the book Trading and Pricing Financial Derivatives, available on Amazon at this link. https://amzn.to/2WIoAL0 Check out our website http://www.onfinance.org/ Follow Patrick on twitter here: https://twitte
From playlist Class 2: An Introduction to Options
Key Distribution - Applied Cryptography
This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
From playlist Applied Cryptography
Understanding Transaction and Trade
Did you ever trade baseball cards as a kid? Or maybe you didn't like your lunch, and traded it with someone else. We all understand trade in this context, exchanging one thing for something else. But any sale is also considered a trade. When we exchange money for goods or services, we are
From playlist Economics
Continuous Probability Distributions - Basic Introduction
This statistics video tutorial provides a basic introduction into continuous probability distributions. It discusses the normal distribution, uniform distribution, and the exponential distribution. The probability is equal to the area under the curve and the total area under the curve is
From playlist Statistics
Stack Data Structure - Algorithm
This is an explanation of the dynamic data structure known as a stack. It includes an explanation of how a stack works, along with pseudocode for implementing the push and pop operations with a static array variable.
From playlist Data Structures
In this video, you’ll learn more about the sharing economy. Visit https://www.gcflearnfree.org/using-the-web-to-get-stuff-done/what-is-the-sharing-economy/1/ for our text-based lesson. This video includes information on: • An explanation of the sharing economy • Examples of the sharing ec
From playlist The Sharing Economy
Blockchain Full Course - 4 Hours | Blockchain Tutorial |Blockchain Technology Explained |Simplilearn
🔥Professional Certificate Program In Blockchain: https://www.simplilearn.com/blockchain-certification-training-cours?utm_campaign=Blockchain-SyVMma1IkXM&utm_medium=DescriptionFirstFold&utm_source=youtube This Blockchain Tutorial Full Course will help you understand all the basic concepts
From playlist Blockchain Tutorial Videos 🔥[2022 Updated] | Simplilearn
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From playlist Blockchain Tutorial Videos 🔥[2022 Updated] | Simplilearn
Blockchain Technology Explained | What Is Blockchain Technology? | Blockchain Training | Edureka
(** Blockchain Training: https://www.edureka.co/blockchain-training **) This Edureka video on Blockchain technology will explain the crux behind blockchain technology and simplify its working. The following topics will be discussed in this tutorial 1. Blockchain Definition 2. Centralized
From playlist Blockchain Tutorial Videos | Edureka
Blockchain Technology Explained (2 Hour Course)
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🔥Free Blockchain Developer Course with Completion Certificate: https://www.simplilearn.com/learn-blockchain-basics-skillup?utm_campaign=BlockchainDeveloperTutorialforBeginners&utm_medium=Description&utm_source=youtube ✅Subscribe to our Channel to learn more about the top Technologies
From playlist Blockchain Tutorial Videos 🔥[2022 Updated] | Simplilearn
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🔥 Enroll for FREE Blockchain Course & Get your Completion Certificate: https://www.simplilearn.com/learn-blockchain-basics-skillup?utm_campaign=BlockchainDevFC17Jul22&utm_medium=Description&utm_source=youtube This video by simplilearn is based on the Blockchain developer course for 2022.
From playlist Simplilearn Live
Blockchain Interview Questions And Answers | Blockchain Technology Interview Questions | Simplilearn
This video on "Blockchain Interview Questions And Answers" will help you prepare for Blockchain engineer interviews. This video is ideal for both beginners as well as professionals who are appearing for Blockchain interviews. Once you’ve lined up a job interview with a potential employer,
From playlist Interview Questions And Answers | Simplilearn🔥[2022 Updated]
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From playlist Blockchain Tutorial Videos 🔥[2022 Updated] | Simplilearn
How do we multiply polynomials
👉 Learn how to multiply polynomials. To multiply polynomials, we use the distributive property. The distributive property is essential for multiplying polynomials. The distributive property is the use of each term of one of the polynomials to multiply all the terms of the other polynomial.
From playlist How to Multiply Polynomials
Lecture 12: Distributed Transactions
Lecture 12: Distributed Transactions MIT 6.824: Distributed Systems (Spring 2020) https://pdos.csail.mit.edu/6.824/
From playlist MIT 6.824 Distributed Systems (Spring 2020)