Welcome
Administering
In addition to administering the database server, you can tune performance, replicate data, and archive data.
Enterprise Replication
The describes the concepts of data replication using HCL Informix® Enterprise Replication, including how to design your replication system, as well as administer and manage data replication throughout your enterprise.
About Enterprise Replication
HCL Informix® Enterprise Replication generates and manages multiple copies of data at one or more sites, which allows an enterprise to share corporate data throughout its organization.
HCL Informix® Enterprise Replication technical overview
HCL Informix® Enterprise Replication is an asynchronous, log-based tool for replicating data between HCL Informix database servers. on the source server captures transactions to be replicated by reading the logical log, storing the transactions, and reliably transmitting each transaction as replication data to the target servers.
Flexible Architecture
allows replications based on specific business and application requirements and does not impose model or methodology restrictions on the enterprise.

HCL Informix® V15.0.0 documentation
Welcome to the documentation for HCL Informix® 15.0.0 and related client tools and products.
Product overview
HCL Informix® is a fast and scalable database server that manages traditional relational, object-relational, and dimensional databases. Its small footprint and self-managing capabilities are suited to embedded data-management solutions.
Installing
These topics describe how to install HCL Informix® database servers, client products, and modules.
Administering
In addition to administering the database server, you can tune performance, replicate data, and archive data.
- System administration
  These topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL Informix® database servers.
- Backup and Restore Guide
  The HCL® Informix® Backup and Restore Guide describes how to use the HCL Informix and ontape utilities to back up and restore database server data. These utilities enable you to recover your databases after data is lost or becomes corrupted due to hardware or software failure or accident.
- Enterprise Replication
  The describes the concepts of data replication using HCL Informix® Enterprise Replication, including how to design your replication system, as well as administer and manage data replication throughout your enterprise.
  - About Enterprise Replication
    HCL Informix® Enterprise Replication generates and manages multiple copies of data at one or more sites, which allows an enterprise to share corporate data throughout its organization.
    - HCL Informix® Enterprise Replication technical overview
      HCL Informix® Enterprise Replication is an asynchronous, log-based tool for replicating data between HCL Informix database servers. on the source server captures transactions to be replicated by reading the logical log, storing the transactions, and reliably transmitting each transaction as replication data to the target servers.
      - Enterprise Replication Terminology
        You must understand terminology.
      - Asynchronous Data Replication
      - Log-Based Data Capture
      - High Performance
      - High Availability
      - Consistent Information Delivery
      - Repair and Initial Data Synchronization
        provides initial data synchronization and multiple methods to repair replicated data.
      - Flexible Architecture
        allows replications based on specific business and application requirements and does not impose model or methodology restrictions on the enterprise.
      - Centralized Administration
      - Ease of Implementation
      - Network Encryption
        Enterprise Replication supports the same network encryption options that you can use with communications between server and clients to provide complete data encryption.
    - How Enterprise Replication Replicates Data
  - Planning and designing for Enterprise Replication
    Before you set up your replication system, plan how to include Enterprise Replication into your database server environment, design your database schema by following Enterprise Replication requirements, and then design your replication system between database servers.
  - Setting up and managing Enterprise Replication
    After you design your replication system, you define it and start replication.
  - Push data feature
  - Loopback replication
  - Appendixes
Migrating and upgrading
You can upgrade to the 15.0.0 release of HCL Informix® or migrate from other database servers to Informix. Upgrading is an in-place migration method that uses your existing hardware and operating system software. Some changes to the Informix database server can affect upgrading from a previous release.
Client APIs and tools
You can use the HCL Informix® implementation of client APIs to develop applications for Informix database servers.
Embedding Informix®
When you embed HCL Informix®, you can use enterprise-class high-availability and high performance with embeddability features such as easy programmability, a small disk and memory footprint, and silent deployment.
Extending Informix®
Beyond standard relational database objects, HCL Informix® can be extended to handle specialized data types, access methods, routines, and other objects. Informix includes many built-in extensions that are fully integrated in the database server. Informix also provides modules, which are packages of extended database objects for a particular purpose and that are installed separately from the database server. Alternatively, you can create your own user-defined objects for Informix.
Data warehousing
In addition to designing and implementing Informix® dimensional databases, you can use tools to create data warehouse applications and optimize your data warehouse queries.
Designing databases
The first step in creating a relational database is to construct a data model, which is a precise, complete definition of the data you want to store. After you prepare your data model, you must implement it as a database and tables. To implement your data model, you first select a data type for each column and then you create a database and tables and populate the tables with data. You can also implement fragmentation strategies and control access to your data.
JSON compatibility
You can use the popular JSON-oriented query language created by MongoDB to interact with data stored in HCL Informix®.
Security
You can secure your Informix® database server and the data that is stored in your Informix databases. You can encrypt data, secure connections, control user privileges and access, and audit data security.
SQL programming
You can use the HCL Informix® implementation of the SQL language to develop applications for Informix database servers.
Troubleshooting HCL Informix®
Several troubleshooting techniques, tools, and resources are available for resolving problems that you encounter in your HCL Informix® database server environment.

Flexible Architecture

allows replications based on specific business and application requirements and does not impose model or methodology restrictions on the enterprise.

supports both primary-target and update-anywhere replication models.

supports the following network topologies:

Fully connected
Continuous connectivity between all participating database servers.
Hierarchical tree
A parent-child configuration that supports continuous and intermittent connectivity.
Forest of trees
Multiple hierarchical trees that connect at the root database servers.

You can add High-Availability Data Replication to any of these topologies.

Enterprise Replication supports all built-in HCL® Informix® data types, as well as extended and user-defined data types.

operates in LAN, WAN, and combined LAN/WAN configurations across a range of network transport protocols.

supports the Global Language Support () feature, which allows HCL® Informix® products to handle different languages, regional conventions, and code sets.