Research Journal of Recent Sciences ________________________________________________ ISSN 2277-2502
Vol. 1 (ISC-2011), 426-429 (2012)
Res.J.Recent Sci.

Mini Review Paper

Concurrency Issues of Distributed Advance Transaction Process
Sheetlani Jitendra and Gupta V.K.
Department of Computer Science, NIMS University, Jaipur, Rajasthan, INDIA

Available online at: www.isca.in
(Received 11th October 2011, revised 27th February 2012, accepted 29th 2012)

Abstract
The transactional model for distributed system has been around for many years and it is considered a well-established and
mature technology. The traditional transaction model, although suitable for conventional database applications such as
banking and airline reservation systems, does not provide much flexibility and high performance when used for complex
applications such as object oriented systems, long-lived transactions, or distributed systems. Nested transactions have been
proposed to overcome the limitations of flat transaction model. Nested transactions extend the notion that transactions are
flat entities by allowing a transaction to invoke atomic transactions as well as atomic operations. They provide safe
concurrency within transaction, allow potential internal parallelism to be exploited and offer an appropriate control
structure to support their execution. In this paper we describe distributed database system and their transaction process. In
this paper we also describe advance-nested transactions where the transactions from one system interact with the
transactions from another system. Such nested transactions can expect to become more important with the introduction of
network operating systems and heterogeneous distributed database systems. Finally, we will study about concurrency issue
of nested transaction with respect to distributed database.
Keyword: Distributed database, database, distributed processing, transaction, transaction manager, nested transaction, flat
transaction, atomicity, consistency, isolation, durability, subtransaction.

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