Chapter 4.  Access Method Wrapup

Table of Contents

Data alignment
Retrieving and updating records in bulk
Bulk retrieval
Bulk updates
Bulk deletes
Partial record storage and retrieval
Storing C/C++ structures/objects
Retrieved key/data permanence for C/C++
Error support
Cursor stability
Database limits
Disk space requirements
Specifying a Berkeley DB schema using SQL DDL
Access method tuning
Access method FAQ

Data alignment

The Berkeley DB access methods provide no guarantees about byte alignment for returned key/data pairs, or callback functions which take DBT references as arguments, and applications are responsible for arranging any necessary alignment. The DB_DBT_MALLOC, DB_DBT_REALLOC, and DB_DBT_USERMEM flags may be used to store returned items in memory of arbitrary alignment.