# Using IBM DB2 for z/OS as a source

This section describes how to set up and use an IBM DB2 for z/OS database as the source endpoint in a replication task.

In this section:

* [Prerequisites](https://help.qlik.com/en-US/replicate/May2025/Content/Global_Common/Content/SharedReplicateHDD/IBM4DB2-zos/prereq_db2.htm#ar_ibm_db2_456845099_1404460)
* [Limitations and considerations](https://help.qlik.com/en-US/replicate/May2025/Content/Global_Common/Content/SharedReplicateHDD/IBM4DB2-zos/zos_limitation.htm)
* [Handling actions resulting in subtype 83](https://help.qlik.com/en-US/replicate/May2025/Content/Global_Common/Content/SharedReplicateHDD/IBM4DB2-zos/handling_sub83_utilities.htm)
* [Supported data types](https://help.qlik.com/en-US/replicate/May2025/Content/Replicate/Main/IBM%20DB2%20for%20zOS/db2_db_data_types_source.htm#ar_ibm_db2_456845099_1403728)
* [Setting general connection properties](https://help.qlik.com/en-US/replicate/May2025/Content/Replicate/Main/IBM%20DB2%20for%20zOS/set_up_ibm_db2_for_luw_db_as_source.htm)
* [Setting advanced connection properties](https://help.qlik.com/en-US/replicate/May2025/Content/Replicate/Main/IBM%20DB2%20for%20zOS/advanced_prop_db2_source.htm)
* [Sample XMIT files “Receive” job](https://help.qlik.com/en-US/replicate/May2025/Content/Global_Common/Content/SharedReplicateHDD/IBM4DB2-zos/sample_job.htm)
* [Installing and configuring R4Z](https://help.qlik.com/en-US/replicate/May2025/Content/Global_Common/Content/SharedReplicateHDD/R4Z_Install_Config/concept-design.htm)