Configuring Host Parameters
TCP/IP throughput is greatly affected by the BLOCKTIMEOUT parameter on the host. Typically, the default is 100, which is acceptable for character-oriented communications (for example, Telnet VT™ 100 emulation), but not good for record and block‑oriented communications, as with DATABridge or FTP (file transfer protocol). For DATABridge communications, you can increase throughput by reducing the BLOCKTIMEOUT parameter to a value of 2.
If the DATABridge Client system is on a different subnet from the mainframe, put it on the same subnet so that Ethernet packets can be larger. If you cannot put the DATABridge Client on the same subnet as the mainframe, however, you can improve throughput by adjusting BLOCKSIZE on the host and TCP/IP Window Size on the Windows Server PC.