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AdministeringIn addition to administering the database server, you can tune performance, replicate data, and archive data.
System administrationThese topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL Informix® database servers.
Administrator's GuideThe Informix® Administrator's Guide provides the information required to administer HCL Informix®.
The database server
Client/server communicationThese topics explain the concepts and terms that you must understand in order to configure client/server communication.
Connectivity filesThe connectivity files contain the information that enables client/server communication and enable a database server to communicate with another database server.
Network-configuration filesThese topics identify and explain the use of network-configuration files on TCP/IP networks.
TCP/IP connectivity filesWhen you configure the database server to use the TCP/IP network protocol, you use information from the hosts and services files to prepare the sqlhosts information.
Client and server actions when a TCP/IP connection is openedWhen a TCP/IP connection is opened, information is read on both the client side and server side.

Client and server actions when a TCP/IP connection is opened

When a TCP/IP connection is opened, information is read on both the client side and server side.

The following information is read on the client side:

The INFORMIXSERVER environment variable.
The hosts file information (INFORMIXSQLHOSTS environment variable, $INFORMIXDIR/etc/sqlhosts file and services file information
Other environment variables
Resource files

The following information is read on the server side:

The DBSERVERNAME configuration parameter
The DBSERVERALIASES configuration parameter
Server environment variables and configuration parameters, including any NETTYPE configuration parameter setting that manages TCP/IP connections.

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