venky

• Sep 12th, 2005

 

If your EJB container talks with Multiple databases(EIS) in single trasaction that is been called as distributed transacation.

Mannu Kumar Pandey

• Nov 3rd, 2005

 

Distributed transaction are executed in a distributed manner (may on more than one machine) while flat are not having this feature.

sudarshan

• Apr 5th, 2013

 

A nested transaction is a transaction that is logically decomposed into the hierarchy of sub transaction.

A distributed transaction that is logically flat, indivisible transaction that operates on distributed data

ManishaKaushik

 Profile Answers by ManishaKaushik 

• Jan 14th, 2016

 

In a flat transaction, each transaction is decoupled from and independent of other transactions in the system. You cannot start another transaction in the same thread until the current transaction ends.

While distributed transactions that span multiple resources (such as databases) and supports the two-phase commit protocol for CMP EJBs.

Or may be we can say, distributed is type of Flat transaction where transaction is distributed among different resources.

Ahmed EL-Ghonimy

• Mar 17th, 2016

 

This question is tricky and wrong because comparing a Transaction Model with a transaction type is not correct. Flat transactions could be local (standard) or global (distributed). If it were straight forward, it would compare between flat and nested transactions.

imran

• Jan 3rd, 2017

 

Flat transaction send out requests to different servers and each request is completed before client goes to the next one. Nested transaction allows sub-transactions at the same level to execute concurrently