Global transactions refer to coordinated operations across multiple distributed systems or databases that must be treated as a single unit of work. In a distributed environment, where transactions can span multiple nodes or databases, ensuring the atomicity, consistency, isolation, and durability (ACID properties) of transactions becomes challenging. Global transactions involve multiple local transactions that must be executed together in a coordinated manner to maintain data integrity and consistency across the distributed system. Techniques such as two-phase commit (2PC) and three-phase commit (3PC) protocols are commonly used to coordinate global transactions, ensuring that either all participating nodes commit the transaction or none do, to prevent data inconsistencies. Global transactions are essential for maintaining data consistency and integrity in distributed systems, enabling applications to perform complex operations across multiple nodes or databases as a single logical transaction. s://en.wikipedia.org/wiki/Global_transaction