IBM Informix Dynamic Server explained
Informix Dynamic Server, also known as IDS, is an extensible Relational Database Management System originally developed by Informix Software Inc. (originally Relational Database Systems, Inc). IDS is now part of the IBM Software Group database portfolio.
Current version is 11.50 released in May 2008, code named 'Cheetah 2'.
IBM produces Informix Dynamic Server in several editions . The following information applies to V10 and V11 of the database engine  :
- Informix Dynamic Server Enterprise Edition: Fully featured and the only edition to feature Enterprise Replication (ER) and the new Remote Secondary Server (RSS) feature available from IDS V11 onwards.
- Informix Dynamic Server Workgroup Edition: Lacking Enterprise Replication (ER) and requiring High-availability Replication (HDR) and the parallel performance feature to be purchased as options, this edition is restricted to 4 CPUs and 8Gb memory.
- Informix Dynamic Server Express Edition: Available only for 32-bit Intel systems running Windows or Linux, lacking High-availability Data Replication (HDR) and Enterprise Replication (ER), features to facilitate parallel operations, datablades and restricted to 2 CPUs and 4Gb RAM, this edition is aimed at small and medium sized companies.
Each edition above is subject to pricing based on a choice of IBM's processor value unit scheme, the number of authorised users or concurrent sessions (not an option with Express edition).
In addition there is a Developer Edition that can be trialled for an unlimited period  .
Informix Dynamic Server
Notes and References
- Web site: Informix Dynamic Server Product Overview. 2008-05-06.
- Web site: Compare the Informix Dynamic Server Version 11 editions. 2008-05-06.
- Web site: Informix Dynamic Server Enterprise and Developer Edition V11.1. 2008-05-06.