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Chapter 15. Distributed Transactions
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## Chapter 15. Distributed Transactions

## Introduction

An application must use distributed transactions whenever it wants transactional semantics either across operations in multiple Berkeley DB environments (even if they are on the same machine) or across operations in Berkeley DB and some other database systems (for example, Oracle server). Berkeley DB provides support for distributed transactions using a two-phase commit protocol. In order to use the two-phase commit feature of Berkeley DB, an application must either implement its own global transaction manager or use an XA-compliant transaction manager such as Oracle Tuxedo (as Berkeley DB can act as an XA-compliant resource manager).

This chapter explains Berkeley DB's XA-compliant resource manager, which can be used in any X/Open distributed transaction processing system, and explains how to configure Oracle Tuxedo to use the Berkeley DB resource manager.

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