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.
Appendixes
SMI Table Reference
The system-monitoring interface (SMI) tables in the sysmaster database provide information about the state of the database server. Enterprise Replication uses the following SMI tables.
The syscdrqueued Table
The syscdrqueued table contains data-queued information.

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.
  - 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
    - The cdr utility
      You use the cdr utility to configure and control from the command line on your UNIX™ or Windows™ operating system.
    - configuration parameter and environment variable reference
      You can use configuration parameters and environment variables to configure the behavior of .
    - Grid routines
      Grid routines are used to create and maintain the grid and to administer servers in the grid by propagating commands from a source server to all other servers in the grid.
    - Enterprise Replication routines
      Enterprise Replication routines used to control if a replicated transaction is recaptured.
    - onstat -g commands for Enterprise Replication
      You can monitor and debug Enterprise Replication activity using onstat -g commands.
    - syscdr Tables
      These tables in the syscdr database contain progress information about consistency checking and synchronization operations.
    - SMI Table Reference
      The system-monitoring interface (SMI) tables in the sysmaster database provide information about the state of the database server. Enterprise Replication uses the following SMI tables.
      - The syscdr_ats Table
        The syscdr_ats table contains the first ten lines of the transaction header for each ATS file.
      - The syscdr_atsdir Table
        The syscdr_atsdir table contains information about the contents of the ATS directory.
      - The syscdr_ddr Table
        The syscdr_ddr table contains information about the status of log capture and the proximity or status of transaction blocking (DDRBLOCK) or transaction spooling.
      - The syscdr_nif Table
        The syscdr_nif table contains information about network connections and the flow of data between servers.
      - The syscdr_rcv Table
        The syscdr_rcv table contains information about transactions being applied on target servers and acknowledgments being sent from target servers.
      - The syscdr_ris Table
        The syscdr_ris table contains the first ten lines of the transaction header for each RIS file.
      - The syscdr_risdir Table
        The syscdr_risdir table contains information about the contents of the RIS directory.
      - The syscdr_rqm Table
        The syscdr_rqm table contains statistics and contents of the low-level queues (send queue, receive queue, ack send queue, sync send queue, and control send queue) managed by the Reliable Queue Manager (RQM).
      - The syscdr_rqmhandle Table
        The syscdr_rqmhandle table contains information about which transaction is being processed in each queue. The handle marks the position of the thread in the queue.
      - The syscdr_rqmstamp Table
        The syscdr_rqmstamp table contains information about which transaction is being added to each queue.
      - The syscdr_state Table
        The syscdr_state table contains status on Enterprise Replication, data capture, data apply, and the network between the servers.
      - The syscdrack_buf Table
        The syscdrack_buf table contains information about the buffers that form the acknowledgment queue.
      - The syscdrack_txn Table
        The syscdrack_txn table contains information about the acknowledgment queue.
      - The syscdrctrl_buf Table
        The syscdrctrl_buf table contains buffers that provide information about the control queue. The control queue is a stable queue that contains control messages for the replication system.
      - The syscdrctrl_txn Table
        The syscdrctrl_txn table contains information about the control queue. The control queue is a stable queue that contains control messages for the replication system.
      - The syscdrerror Table
        The syscdrerror table contains information about errors that Enterprise Replication has encountered.
      - The syscdrlatency Table
        The syscdrlatency table contains statistics about Enterprise Replication latency (the time it takes to replicate transactions).
      - The syscdrpart Table
        The syscdrpart table contains participant information.
      - The syscdrprog Table
        The syscdrprog table lists the contents of the Enterprise Replication progress tables.
      - The syscdrq Table
        The syscdrq table contains information about Enterprise Replication queues.
      - The syscdrqueued Table
        The syscdrqueued table contains data-queued information.
      - The syscdrrecv_buf Table
        The syscdrrecv_buf table contains buffers that provide information about the data-receive queue.
      - The syscdrrecv_stats Table
        The syscdrrecv_stats table contains statistics about the receive manager. The receive manager is a set of service routines between the receive queues and data sync.
      - The syscdrrecv_txn Table
        The syscdrrecv_txn table contains information about the data receive queue. The receive queue resides in memory.
      - The syscdrrepl Table
        The syscdrrepl table contains replicate information.
      - The syscdrreplset Table
        The syscdrreplset table contains replicate set information.
      - The syscdrs Table
        The syscdrs table contains information about database servers in an Enterprise Replication domain.
      - The syscdrsend_buf Table
        The syscdrsend_buf table contains buffers that give information about the send queue.
      - The syscdrsend_txn Table
        The syscdrsend_txn table contains information about the send queue.
      - The syscdrserver Table
        The syscdrserver table contains information about database servers declared to .
      - The syscdrsync_buf Table
        The syscdrsync_buf table contains buffers that give information about the synchronization queue. Enterprise Replication uses this queue only when defining a replication server and synchronizing its global catalog with another replication server.
      - The syscdrsync_txn Table
        The syscdrsync_txn table contains information about the synchronization queue. This queue is currently used only when defining a replication server and synchronizing its global catalog with another replication server. The synchronization queue is an in-memory-only queue.
      - The syscdrtsapply table
        The syscdrtsapply table lists statistics about the time series elements that are applied on target servers.
      - The syscdrtx Table
        The syscdrtx table contains information about transactions.
      - Enterprise Replication Queues
    - Replication Examples
      This appendix contains simple examples of replication using the command-line utility (CLU).
    - Data sync warning and error messages
      Data sync warning and error messages describe problems with replicated transactions.
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.

The syscdrqueued Table

The syscdrqueued table contains data-queued information.


Column	Type	Description
servername	char(128)	Sending to database server name
name	char(128)	Replicate name
bytesqueued	decimal(32,0)	Number of bytes queued for the server `servername`