Welcome
Administering
In addition to administering the database server, you can tune performance, replicate data, and archive data.
Enterprise Replication
These topics describe 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. Enterprise Replication 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.
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.

HCL Informix® V15.0 documentation
Welcome to the documentation for HCL Informix® 15.0 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 DataBlade® 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
  These topics describe how to use the HCL® Informix® ON-Bar 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
  These topics describe 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. Enterprise Replication 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 Enterprise Replication terminology.
      - Asynchronous Data Replication
      - Log-Based Data Capture
      - High Performance
      - High Availability
      - Consistent Information Delivery
      - Repair and Initial Data Synchronization
        Enterprise Replication provides initial data synchronization and multiple methods to repair replicated data.
      - Flexible Architecture
        Enterprise Replication 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 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 DataBlade® 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.

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.

You can use the Secure Sockets Layer (SSL) protocol, a communication protocol that ensures privacy and integrity of data transmitted over the network, for connections between Enterprise Replication servers. For information on using the SSL protocol, see Secure sockets layer protocol.

You can use encryption configuration parameters to provide data encryption with a standard cryptography library. A message authentication code (MAC) is transmitted as part of the encrypted data transmission to ensure data integrity. This is the same type of encryption provided by the ENCCSM communications support module for non-replication communication. Enterprise Replication shares the same ENCRYPT_CIPHERS, ENCRYPT_MAC, ENCRYPT_MACFILE, and ENCRYPT_SWITCH configuration parameters with high availability clusters. Enterprise Replication encryption configuration parameters are documented in Enterprise Replication configuration parameter and environment variable reference.

Enterprise Replication cannot accept a connection that is configured with a communications support module. To combine client/server network encryption with Enterprise Replication encryption, configure two network connections for each database server, one with CSM and one without. For more information, see Configuring network encryption for replication servers.

Note: Support for Communication Support Module (CSM) is removed starting Informix Server 14.10.xC9 . You should use Transport Layer Security (TLS)/Secure Sockets Layer (SSL) instead.