Follow Techotopia on Twitter

On-line Guides
All Guides
eBook Store
iOS / Android
Linux for Beginners
Office Productivity
Linux Installation
Linux Security
Linux Utilities
Linux Virtualization
Linux Kernel
System/Network Admin
Programming
Scripting Languages
Development Tools
Web Development
GUI Toolkits/Desktop
Databases
Mail Systems
openSolaris
Eclipse Documentation
Techotopia.com
Virtuatopia.com
Answertopia.com

How To Guides
Virtualization
General System Admin
Linux Security
Linux Filesystems
Web Servers
Graphics & Desktop
PC Hardware
Windows
Problem Solutions
Privacy Policy

  




 

 

Postfix Documentation
Previous Page Home Next Page

Postfix CDB Howto


Introduction

CDB (Constant DataBase) is an indexed file format designed by Daniel Bernstein. CDB is optimized exclusively for read access and guarantees that each record will be read in at most two disk accesses. This is achieved by forgoing support for incremental updates: no single-record inserts or deletes are supported. CDB databases can be modified only by rebuilding them completely from scratch, hence the "constant" qualifier in the name.

Postfix CDB databases are specified as "cdb:name", where name specifies the CDB file name without the ".cdb" suffix (another suffix, ".tmp", is used temporarily while a CDB file is under construction). CDB databases are maintained with the postmap(1) or postalias(1) command. The DATABASE_README document has general information about Postfix databases.

CDB support is available with Postfix 2.2 and later releases. This document describes how to build Postfix with CDB support.

Postfix Documentation
Previous Page Home Next Page