Library Version 12.1.6.0

Preface
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## Preface

This document describes how to use transactions with your Berkeley DB applications. It is intended to describe how to transaction protect your application's data. The APIs used to perform this task are described here, as are the environment infrastructure and administrative tasks required by a transactional application. This book also describes multi-threaded and multi-process DB applications and the requirements they have for deadlock detection.

This book describes Berkeley DB 12c Release 1, which provides library version 12.1.6.0.

This book is aimed at the software engineer responsible for writing a transactional DB application.

This book assumes that you have already read and understood the concepts contained in the Getting Started with Berkeley DB guide.

## Conventions Used in this Book

The following typographical conventions are used within in this manual:

Structure names are represented in `monospaced font`, as are `method names`. For example: "`DB->open()` is a method on a `DB` handle."

Variable or non-literal text is presented in italics. For example: "Go to your DB_INSTALL directory."

Program examples are displayed in a `monospaced font` on a shaded background. For example:

    /* File: gettingstarted_common.h */
    typedef struct stock_dbs {
        DB *inventory_dbp; /* Database containing inventory information */
        DB *vendor_dbp;    /* Database containing vendor information */

        char *db_home_dir;       /* Directory containing the database files */
        char *inventory_db_name; /* Name of the inventory database */
        char *vendor_db_name;    /* Name of the vendor database */
    } STOCK_DBS;

In some situations, programming examples are updated from one chapter to the next. When this occurs, the new code is presented in `monospaced bold` font. For example:

    typedef struct stock_dbs {
        DB *inventory_dbp; /* Database containing inventory information */
        DB *vendor_dbp;    /* Database containing vendor information */
        DB *itemname_sdbp; /* Index based on the item name index */
        char *db_home_dir;       /* Directory containing the database files */
        char *itemname_db_name;  /* Itemname secondary database */
        char *inventory_db_name; /* Name of the inventory database */
        char *vendor_db_name;    /* Name of the vendor database */
    } STOCK_DBS;

### Note

Finally, notes of special interest are represented using a note block such as this.

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