Release notes for HCL OneDB for Windows Operating Systems

The Release notes provide a list of useful topics and links for when you install HCL OneDB™ database product or fix pack.


What is HCL OneDB

HCL OneDB is a high-performance, multi-modal, enterprise-class database server designed to run in the Linux, AIX and Windows operating systems.

HCL OneDB is a derivative of the Informix database server, and so it shares a high degree of functionality with the Informix products. HCL OneDB is compatible with all current Informix versions at the SQL and application levels, and so the Informix documentation that describes database administration, high availability, archives, connectivity, application development, and many other features will be referenced. The description within the referenced HCL OneDB documentation will be fully accurate and compatible with OneDB.

You can find out about HCL OneDB capabilities, administration and operational details in the online documentation at this link: HCL OneDB Documentation. We recommend that new users should start with the Getting Started section of the portal. HCL OneDB is available on multiple platforms. We recommend users read and understand the Machine Notes for their platform, before installing or upgrading the product. Machine Notes are available with your product and on the documentation portal.

System Requirements

Although HCL OneDB is an enterprise-class database server that can service thousands of users simultaneously, it is also extremely efficient in the usage of resources. The minimal requirements listed below assume you will have only a few users and a moderate workload.

Minimum disk space and memory requirements:

  • 750 MB of disk space and 256 MB of memory

Many applications require substantially larger systems. Your HCL sales team can help optimize the hardware required for your application.

Refer to the machine notes for more detailed information on system requirements.

Installing HCL OneDB

The HCL OneDB Installation Guide is available on the OneDB documentation site ( ).

If you are migrating from a version of HCL OneDB, make sure that you understand all migration requirements and restrictions before you install the product. For migration information, contact HCL sales team.

Known problems

At time of publication, the following problems were known:

  • Windows firewall exception is needed before installation

    Before you install HCL OneDB on Windows operating systems, make a Windows firewall exception for the TCP listening port that is used by HCL OneDB. By default, the HCL OneDB port is 9088; however, you can specify a different port number during installation.

  • Removing users when you uninstall the database server

    If there are multiple installations of the product on the computer, and you are uninstalling one of the products, be careful when you use the Remove users and groups option. Do not remove users or groups that are required by the other installations of the product. If you remove users or groups that are required by the other products, the other products will not start or they will be inoperable.

  • Starting HCL OneDB instances

    To start an HCL OneDB instance, use the instance shortcut that is in the HCL OneDB program group.

Related Information

More information about other products and services from HCL Technologies can be found at