Table of Contents
- 1 How do you achieve transactions when dealing with two different databases?
- 2 What is cross database transactions?
- 3 How hibernate handle multiple transactions?
- 4 What is Msdtc service in SQL Server?
- 5 How do you handle transactions in multiple microservices?
- 6 Is it possible to run a 2 phase transaction in sqlServer?
- 7 What are the disadvantages of using a transaction across multiple acid resources?
How do you achieve transactions when dealing with two different databases?
If your data is distributed across multiple databases, you may wish to update one database while reading from one or more other databases. This type of access can be performed within a single unit of work (transaction). This type of database access is called multisite update or two-phase commit.
What is cross database transactions?
A Cross database transaction occurs between 2 or more databases on the same server. It does not require the involvement of a DTC (Distributed Transaction Coordinator) A Distributed database transaction occurs between 2 or more databases hosted on multiple servers.
How do you generate database transactions?
A database transaction, by definition, must be atomic (it must either be complete in its entirety or have no effect whatsoever), consistent (it must conform to existing constraints in the database), isolated (it must not affect other transactions) and durable (it must get written to persistent storage).
What is the best way to perform transaction management when multiple Microservices are involved?
Microservices guidelines strongly recommend you to use the Single Repository Principle(SRP), which means each microservice maintains its own database and no other service should access the other service’s database directly. There is no direct and simple way of maintaining ACID principles across multiple databases.
How hibernate handle multiple transactions?
Therefore, you can run multiple transactions on the same Hibernate Session, but there’s a catch. Once an exception is thrown you can no longer reuse that Session. My advice is to divide-and-conquer. Just split all items, construct a Command object for each of those and send them to an ExecutorService#invokeAll .
What is Msdtc service in SQL Server?
MSDTC (aka Microsoft Distributed Transaction Control) is a piece of software that a lot of people use, but they don’t really know what it does, or how it works. MSDTC is used by SQL Server and other applications when they want to make a distributed transaction between more than one machine.
When multiple transactions are in progress?
When multiple transactions are in progress, one transaction may want to read the same data another transaction has changed but not committed. Until the transaction commits, the changes it has made should be treated as transient state, because the transaction could roll back the change.
How is data warehouse different from a transactional database?
The primary difference between a transactional database and a data warehouse database is that while the former is designed (and optimized) to record, the latter has to be designed (and optimized) to respond to analysis questions that are critical for your business.
How do you handle transactions in multiple microservices?
Maintain data consistency across multiple microservices without tight coupling. Perform better compared to 2PC. Offer no single point of failure. Keep the overall state of the transaction eventually consistent.
Is it possible to run a 2 phase transaction in sqlServer?
Yes. e.g. provided that all databases are configured accordingly, you will be able to conduct a 2 phase transaction across SqlServer, Oracle and an MQSeries queue. When communicating with non-Windows tech stack (e.g. to Oracle hosted on *nix server), you’ll likely need to configure XAon your originating .Net server(s).
What is the best way to run two databases at once?
If, however, you just mean two databases within the same DB server, then vanilla JDBC transactions should work just fine, just perform your operations against both databases within a single transaction. In this case you would need a Transaction Monitor (server supporting XA protocol) and make sure your databases supports XA also. Most (all?)
Which JTA-compliant application servers support distributed transactions?
Any JTA-compliant application server (JBoss, GlassFish etc.) supports it out-of-the-box. The resources participating in a distributed transactions could be, for example, two databases of two different microservices.
What are the disadvantages of using a transaction across multiple acid resources?
Maintaining a transaction across multiple ACID resources will invariably maintain locks on these resources, until the transaction is committed or rolled back. This often doesn’t make for good neighbourliness in a high volume enterprise, so be sure to consider the consequences of the locking.